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Prof. Dr. V.A. Bogdanovskaya
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow, Russia

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0 Fuel cell
0 oxygen reduction reaction
0 carbon materials
0 Bioelectrocatalysis
0 Corrosion testing

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Short communication
Published: 16 August 2021 in Chemical Engineering Science
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Developed architecture for a lithium-oxygen battery (LOB) positive electrode based on carbon nanotubes with large-volume pores and a Li-Nafion solid polymer electrolyte (SPE) is engineered. At a Li-Nafion/C ratio of 0.2, a discharge capacity of up to 27000 mA h g−1 achieved. SPE-LOB sustains 182 cycles as compared to 121 cycles for LOB with liquid electrolyte. The high characteristics of the SPE-LOB can be explained in terms of the prevention of the flooding of gas pores, decrease in the ohmic resistance of the system and formation of independent transfer channels of O2 and Li+.

ACS Style

Oleg V. Кorchagin; Viktor V. Emets; Vera A. Bogdanovskaya; Oleg V. Tripachev; Sergey V. Dolgopolov; Vladimir N. Andreev. Large pore volume CNT-based Li-O2 battery with Li-Nafion solid polymer electrolyte. Chemical Engineering Science 2021, 246, 117019 .

AMA Style

Oleg V. Кorchagin, Viktor V. Emets, Vera A. Bogdanovskaya, Oleg V. Tripachev, Sergey V. Dolgopolov, Vladimir N. Andreev. Large pore volume CNT-based Li-O2 battery with Li-Nafion solid polymer electrolyte. Chemical Engineering Science. 2021; 246 ():117019.

Chicago/Turabian Style

Oleg V. Кorchagin; Viktor V. Emets; Vera A. Bogdanovskaya; Oleg V. Tripachev; Sergey V. Dolgopolov; Vladimir N. Andreev. 2021. "Large pore volume CNT-based Li-O2 battery with Li-Nafion solid polymer electrolyte." Chemical Engineering Science 246, no. : 117019.

Journal article
Published: 12 August 2021 in Electrochimica Acta
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Characteristics of LiClO4/TTG and LiClO4/DMF electrolytes at different salt concentrations have been experimentally determined by conductometry, 7Li, 1H, 13C NMR. It has been demonstrated that the influence of these parameters on the oxygen reaction is due to solvation and electrical conductivity, which, determine the transport characteristics of the reaction participants. In DMF the formation of Li2O2 proceeds predominantly through the solution bulk. In TTG the reaction proceeds predominantly on the electrode surface and does not depend on LiClO4 concentration, which is likely due to the formation of Li2O2 on the electrode surface without passing into the solution bulk with a weak concentration dependence of LiClO4 dissociation in TTG. It cannot be ruled out that the LiClO4 concentration in TTG has an effect on the oxygen reduction mechanism at higher concentrations (> 2 M) because of the complex formation. At any LiClO4 concentration in TTG, the amount of electricity in the cathodic process is lower and the reaction reversibility is higher than in DMF solutions. The key factor responsible for the change in the characteristics of the oxygen reaction in TTG is the decrease in the electrical conductivity and diffusion coefficients of O2 and Li+ with increasing concentration, due to the viscosity of the solution and low dielectric constant.

ACS Style

N.V. Panchenko; V.A. Bogdanovskaya; T.L. Kulova; G.A. Kirakosyan; I.A. Zamilatskov; A.S. Pavlov; V.N. Andreev; V.T. Novikov. The effect of lithium salt concentration in an aprotic solvent on the oxygen reaction. Electrochimica Acta 2021, 393, 139073 .

AMA Style

N.V. Panchenko, V.A. Bogdanovskaya, T.L. Kulova, G.A. Kirakosyan, I.A. Zamilatskov, A.S. Pavlov, V.N. Andreev, V.T. Novikov. The effect of lithium salt concentration in an aprotic solvent on the oxygen reaction. Electrochimica Acta. 2021; 393 ():139073.

Chicago/Turabian Style

N.V. Panchenko; V.A. Bogdanovskaya; T.L. Kulova; G.A. Kirakosyan; I.A. Zamilatskov; A.S. Pavlov; V.N. Andreev; V.T. Novikov. 2021. "The effect of lithium salt concentration in an aprotic solvent on the oxygen reaction." Electrochimica Acta 393, no. : 139073.

Journal article
Published: 30 July 2021 in Journal of Electroanalytical Chemistry
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A Pt/MoS2/CNT composite catalytic system for the positive electrode of a lithium-oxygen battery (LOB) was synthesized by the polyol method. It was established that the modification of MoS2 with platinum leads to an increase in electron density in the conduction band and an increase in electrical conductivity as compared to the characteristics of unmodified MoS2. The introduction of a mesoporous carbon material (carbon nanotubes, CNTs) provides a surface available for lithium peroxide accumulation. In this case, the Pt/MoS2/CNT system exhibits bifunctional catalytic properties, reducing the charge voltage and increasing the discharge capacity of a LOB as compared to the MoS2/CNT catalyst. In addition, the Pt/MoS2/CNT composite demonstrates a higher activity and reversibility in the oxygen reduction reaction than Pt/CNT, probably due to an increased corrosion resistance of MoS2. According to the results of cyclic tests, LOBs with the Pt/MoS2/CNT system can withstand at least 120 consecutive cycles versus 80 cycles for the MoS2/CNT catalyst.

ACS Style

O.V. Tripachev; N.V. Panchenko; O.V. Кorchagin; M.V. Radina; S.V. Dolgopolov; O.Yu. Grafov; V.A. Bogdanovskaya. A novel Pt/MoS2/CNT composite catalyst for the positive electrode of a Li-O2 battery. Journal of Electroanalytical Chemistry 2021, 115554 .

AMA Style

O.V. Tripachev, N.V. Panchenko, O.V. Кorchagin, M.V. Radina, S.V. Dolgopolov, O.Yu. Grafov, V.A. Bogdanovskaya. A novel Pt/MoS2/CNT composite catalyst for the positive electrode of a Li-O2 battery. Journal of Electroanalytical Chemistry. 2021; ():115554.

Chicago/Turabian Style

O.V. Tripachev; N.V. Panchenko; O.V. Кorchagin; M.V. Radina; S.V. Dolgopolov; O.Yu. Grafov; V.A. Bogdanovskaya. 2021. "A novel Pt/MoS2/CNT composite catalyst for the positive electrode of a Li-O2 battery." Journal of Electroanalytical Chemistry , no. : 115554.

Journal article
Published: 05 March 2021 in Catalysts
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Platinum deposited on dispersed materials has so far been the most demanded catalyst for creating cathodes for a wide range of electrochemical power sources. This paper sets out to investigate the effect of carbon nanotube (CNT) modification by O, N, and P atoms on the structural, electrocatalytic, and corrosion properties of the as-synthesized monoplatinum catalysts. The investigated Pt/CNTmod catalysts showed an increased electrochemically active platinum surface area and electrical conductivity, as well as an increased catalytic activity in the oxygen reduction reaction (ORR) in alkaline electrolytes. The improved characteristics of Pt/CNT catalysts are explained by alterations in the composition and number of groups, which are formed on the CNT surface, and their electronic structure. By the sum of the main characteristics, Pt/CNTHNO3+N and Pt/CNTHNO3+NP are the most promising catalysts for use as cathode materials in alkaline media.

ACS Style

Vera Bogdanovskaya; Inna Vernigor; Marina Radina; Vladimir Andreev; Oleg Korchagin. Nanocomposite Cathode Catalysts Containing Platinum Deposited on Carbon Nanotubes Modified by O, N, and P Atoms. Catalysts 2021, 11, 335 .

AMA Style

Vera Bogdanovskaya, Inna Vernigor, Marina Radina, Vladimir Andreev, Oleg Korchagin. Nanocomposite Cathode Catalysts Containing Platinum Deposited on Carbon Nanotubes Modified by O, N, and P Atoms. Catalysts. 2021; 11 (3):335.

Chicago/Turabian Style

Vera Bogdanovskaya; Inna Vernigor; Marina Radina; Vladimir Andreev; Oleg Korchagin. 2021. "Nanocomposite Cathode Catalysts Containing Platinum Deposited on Carbon Nanotubes Modified by O, N, and P Atoms." Catalysts 11, no. 3: 335.

Journal article
Published: 28 October 2020 in Energies
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The demand for alternative sources of clean, sustainable, and renewable energy has been a focus of research around the world for the past few decades. Microbial/enzymatic biofuel cells are one of the popular technologies for generating electricity from organic substrates. Currently, one of the promising fuel options is based on glucose due to its multiple advantages: high energy intensity, environmental friendliness, low cost, etc. The effectiveness of biofuel cells is largely determined by the activity of biocatalytic systems applied to accelerate electrode reactions. For this work with aerobic granular sludge as a basis, a nitrogen-fixing community of microorganisms has been selected. The microorganisms were immobilized on a carbon material (graphite foam, carbon nanotubes). The bioanode was developed from a selected biological material. A membraneless biofuel cell glucose/oxygen, with abiotic metal catalysts and biocatalysts based on a microorganism community and enzymes, has been developed. Using methods of laboratory electrochemical studies and mathematical modeling, the physicochemical phenomena and processes occurring in the cell has been studied. The mathematical model includes equations for the kinetics of electrochemical reactions and the growth of microbiological population, the material balance of the components, and charge balance. The results of calculations of the distribution of component concentrations over the thickness of the active layer and over time are presented. The data obtained from the model calculations correspond to the experimental ones. Optimization for fuel concentration has been carried out.

ACS Style

Violetta Vasilenko; Irina Arkadeva; Vera Bogdanovskaya; George Sudarev; Sergei Kalenov; Marco Vocciante; Eleonora Koltsova. Glucose-Oxygen Biofuel Cell with Biotic and Abiotic Catalysts: Experimental Research and Mathematical Modeling. Energies 2020, 13, 5630 .

AMA Style

Violetta Vasilenko, Irina Arkadeva, Vera Bogdanovskaya, George Sudarev, Sergei Kalenov, Marco Vocciante, Eleonora Koltsova. Glucose-Oxygen Biofuel Cell with Biotic and Abiotic Catalysts: Experimental Research and Mathematical Modeling. Energies. 2020; 13 (21):5630.

Chicago/Turabian Style

Violetta Vasilenko; Irina Arkadeva; Vera Bogdanovskaya; George Sudarev; Sergei Kalenov; Marco Vocciante; Eleonora Koltsova. 2020. "Glucose-Oxygen Biofuel Cell with Biotic and Abiotic Catalysts: Experimental Research and Mathematical Modeling." Energies 13, no. 21: 5630.

Journal article
Published: 07 August 2020 in Catalysts
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The influence of the types and amounts of oxygen (O), nitrogen (N), and/or phosphorus (P) heteroatoms on the surface of carbon nanotubes (CNTs) on stability and catalytic activity in the oxygen reduction reaction (ORR) was investigated in alkaline media. It is shown that functionalization of CNTs leads to growth of the electrochemically active surface and to an increase in activity in the ORR. At the same time, a decrease in stability is observed after functionalization of CNTs under accelerated corrosion testing in alkaline media. These results are most significant on CNTs after functionalization in HNO3, due to the formation of a large number of structural defects. However, subsequent doping with N and/or P atoms provides a further activity increase and enhances the corrosion stability of CNTs. Thus, as shown by the studies of characteristic parameters (electrochemical active surface values (SEAS); E1/2; corrosion stability), CNTs doped with N and NP are promising catalytic systems that can be recommended for use as fuel cell cathodes. An important condition for effective doping is the synthesis of carboxyl and carbonyl oxygen-containing groups on the surface of CNTs.

ACS Style

Vera Bogdanovskaya; Inna Vernigor; Marina Radina; Vladimir Andreev; Oleg Korchagin; Vasilii Novikov. Carbon Nanotube Modified by (O, N, P) Atoms as Effective Catalysts for Electroreduction of Oxygen in Alkaline Media. Catalysts 2020, 10, 892 .

AMA Style

Vera Bogdanovskaya, Inna Vernigor, Marina Radina, Vladimir Andreev, Oleg Korchagin, Vasilii Novikov. Carbon Nanotube Modified by (O, N, P) Atoms as Effective Catalysts for Electroreduction of Oxygen in Alkaline Media. Catalysts. 2020; 10 (8):892.

Chicago/Turabian Style

Vera Bogdanovskaya; Inna Vernigor; Marina Radina; Vladimir Andreev; Oleg Korchagin; Vasilii Novikov. 2020. "Carbon Nanotube Modified by (O, N, P) Atoms as Effective Catalysts for Electroreduction of Oxygen in Alkaline Media." Catalysts 10, no. 8: 892.

Preprint
Published: 14 July 2020
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The influence of the type and amount of oxygen (O), nitrogen (N), and/or phosphorus (P) heteroatoms on the surface of carbon nanotube (CNT) on stability and catalytic activity in the oxygen reduction reaction (ORR) was investigated in alkaline media. It is shown that the functionalization of CNT leads to the growth of the electrochemically active surface and to an increase in the activity in ORR. At the same time, a decrease in stability is observed after the functionalization of CNT under accelerated corrosion testing in an alkaline media. These results are most significant on CNT after functionalization in HNO3 due to the formation of a large number of structural defects. However, the subsequent doping by N and / or P atoms provides a further activity increase and enhances the corrosion stability of CNT. Thus, as shown by the studies of characteristic parameters (SEAS, E1/2, corrosion stability), CNT doped with N and NP are a promising catalytic system that can be recommended for use as fuel cell cathodes. An important condition for effective doping is the synthesis of carboxyl and carbonyl oxygen containing group on the surface of CNT.

ACS Style

Vera Bogdanovskaya; Inna Vernigor; Marina Radina; Vladimir Andreev; Oleg Korchagin; Vasilii Novikov. Carbon Nanotube Modified by (O, N, P) Atoms as Effective Catalysts for Electroreduction of Oxygen in Alkaline Media. 2020, 1 .

AMA Style

Vera Bogdanovskaya, Inna Vernigor, Marina Radina, Vladimir Andreev, Oleg Korchagin, Vasilii Novikov. Carbon Nanotube Modified by (O, N, P) Atoms as Effective Catalysts for Electroreduction of Oxygen in Alkaline Media. . 2020; ():1.

Chicago/Turabian Style

Vera Bogdanovskaya; Inna Vernigor; Marina Radina; Vladimir Andreev; Oleg Korchagin; Vasilii Novikov. 2020. "Carbon Nanotube Modified by (O, N, P) Atoms as Effective Catalysts for Electroreduction of Oxygen in Alkaline Media." , no. : 1.

Short communication
Published: 26 June 2020 in Journal of Electroanalytical Chemistry
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The effect of discharge depth on the life of lithium–oxygen batteries (LOBs) is studied under cycling in TEGDME and DMSO media. It is shown that in LOBs based on alkali–treated carbon nanotubes (CNTOH and PtCo/CNTOH) combining high outer surface area, volume, and average diameter of pores, cycling reversibility increases at a transition from the maximum coverage of the positive electrode by lithium peroxide to the monolayer coverage. For LOBs with XC-72, reversibility does not depend on the discharge depth owing to the close values of the Li2O2 monolayer thickness and average pore size. For each of the materials, replacement of DMSO by TEGDME allows enhancing the LOB life in the studied cycling modes. For CNTOH and PtCo/CNTOH, coefficients are determined that characterize variation of LOB parameters at a transition from the monolayer coverage to the maximum coverage of the positive electrode. The calculated coefficients allow predicting the LOB characteristics at a change in the discharge mode or solvent type.

ACS Style

Oleg V. Korchagin; Vera A. Bogdanovskaya; Marina V. Radina; Oleg V. Tripachev; Viktor V. Emets. Lifetime of lithium–oxygen battery in “limited depth discharge” and “deep depth discharge” cycling modes. Journal of Electroanalytical Chemistry 2020, 873, 114393 .

AMA Style

Oleg V. Korchagin, Vera A. Bogdanovskaya, Marina V. Radina, Oleg V. Tripachev, Viktor V. Emets. Lifetime of lithium–oxygen battery in “limited depth discharge” and “deep depth discharge” cycling modes. Journal of Electroanalytical Chemistry. 2020; 873 ():114393.

Chicago/Turabian Style

Oleg V. Korchagin; Vera A. Bogdanovskaya; Marina V. Radina; Oleg V. Tripachev; Viktor V. Emets. 2020. "Lifetime of lithium–oxygen battery in “limited depth discharge” and “deep depth discharge” cycling modes." Journal of Electroanalytical Chemistry 873, no. : 114393.

Journal article
Published: 01 June 2020 in Materials Science Forum
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Microbial fuel cell (MFC) is a new technology that uses microorganisms to extract energy from complex organic mixtures. On the basis of aerobic granular sludge we have selected a nitrogen-fixing community of microorganisms that was immobilized on a carbon material (graphite foam, carbon nanotubes). The MFC anode has been developed on the basis of selected biological material. A membraneless glucose / oxygen MFC with bioanode and cathode based on non-platinum group metals or laccase enzyme has been developed. A mathematical model describing the processes in the MFC has been developed, on its base the calculations have been carried out.

ACS Style

Eleonora Koltsova; Vera Bogdanovskaya; Violetta Vasilenko; Sergei Kalenov; Oleg Korchagin; Evgeniia Fokina. Development of a Bioanod, Experimental Studies and Mathematical Modelling of Membraneless Microbial Fuel Cell. Materials Science Forum 2020, 995, 77 -83.

AMA Style

Eleonora Koltsova, Vera Bogdanovskaya, Violetta Vasilenko, Sergei Kalenov, Oleg Korchagin, Evgeniia Fokina. Development of a Bioanod, Experimental Studies and Mathematical Modelling of Membraneless Microbial Fuel Cell. Materials Science Forum. 2020; 995 ():77-83.

Chicago/Turabian Style

Eleonora Koltsova; Vera Bogdanovskaya; Violetta Vasilenko; Sergei Kalenov; Oleg Korchagin; Evgeniia Fokina. 2020. "Development of a Bioanod, Experimental Studies and Mathematical Modelling of Membraneless Microbial Fuel Cell." Materials Science Forum 995, no. : 77-83.

Originalpaper
Published: 01 March 2020 in Russian Journal of Electrochemistry
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Currently, the development of lithium–oxygen (air) battery became a hot topic. It is recognised that its specific energy will exceed that of traditional lithium-ion batteries by order of magnitude. The principal element of the lithium–oxygen battery, that is, the active layer of the cathode constitutes a layer of material with a complicated pore structure. During discharge, some electrochemical and chemical processes therein result in the accumulation of lithium peroxide that eventually has been used in the lithium–oxygen battery charging. This power source still suffers from disadvantages, indeed. In this work, computer simulation is used in the elucidating of the effects of the cathode active layer structure on the lithium–oxygen battery overall characteristics during its charging and discharging. A set of obstacles on the way to improvement of the lithium–oxygen battery overall characteristics has been revealed. The obstacles are shown being crucial, they cannot be overcome in terms of current practice of the designing of the lithium–oxygen battery cathode. Therefore, new approaches to the manufacturing of lithium–oxygen battery cathode have to be sought for.

ACS Style

Yu. G. Chirkov; V. I. Rostokin; V. N. Andreev; V. A. Bogdanovskaya. Computer Simulation of the Structure and Operation Mechanisms for the Active Layer of Lithium–Oxygen Battery Cathode. Russian Journal of Electrochemistry 2020, 56, 230 -238.

AMA Style

Yu. G. Chirkov, V. I. Rostokin, V. N. Andreev, V. A. Bogdanovskaya. Computer Simulation of the Structure and Operation Mechanisms for the Active Layer of Lithium–Oxygen Battery Cathode. Russian Journal of Electrochemistry. 2020; 56 (3):230-238.

Chicago/Turabian Style

Yu. G. Chirkov; V. I. Rostokin; V. N. Andreev; V. A. Bogdanovskaya. 2020. "Computer Simulation of the Structure and Operation Mechanisms for the Active Layer of Lithium–Oxygen Battery Cathode." Russian Journal of Electrochemistry 56, no. 3: 230-238.

Journal article
Published: 01 September 2019 in Russian Journal of Electrochemistry
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The necessity of the studying of carbonaceous materials differing in their surface area and structure is called for by the fact that these materials are used until now in the designing of positive electrodes for lithium-oxygen current sources. Under the model conditions, the effect of some factors on the effectiveness of oxygen reduction reaction at the positive electrode is studied. Among them are: properties of the dimethylsulfoxide- and acetonitrile-based electrolytes, the carbonaceous material (ХС 72, Super P, and carbon nanotubes) structure and its relevant transport processes depending on the electrode active layer mass (thickness) and the polarization current density, which determines the oxygen reaction effectiveness at the carbonaceous material. The electrochemically active surface area is shown to increase with the specific surface area, which is determined by the carbonaceous material porous structure, its mass at the electrode, the solvent properties, and the reaction rate. The active layer thickness and current density must be chosen for each carbonaceous material individually, depending upon its structure. At that, the active layer entire surface must be electrochemically accessible; it must make possible the lithium peroxide formation and subsequent decomposition. In the dimethylsulfoxide-based electrolyte (high donor number), the oxygen reduction reaction is highly reversible; the lithium peroxide formation here occurs via disproportionation in the solution bulk and results in the formation of Li2O2 particles with disordered (in all probability, toroidal) structure. This facilitates the back reaction (Li2O2 anodic decomposition), in good agreement with literature data [1]. In acetonitrile-based electrolyte (low donor number), the oxygen reduction reaction occurs in adsorbed state, producing LiО2 that disproportionates at the electrode surface forming a lithium peroxide insulating film whose oxidation needs high overvoltage. On the strength of all the parameters, carbon nanotubes are most effective in the oxygen reduction reaction in the dimethylsulfoxide-based electrolyte, because the carbon nanotubes have large volume of mesopores for the reactant transport, high electrochemically active surface area for the Li2O2 accumulation, and thus provide high characteristics per electrode.

ACS Style

V. A. Bogdanovskaya; N. V. Panchenko; M. V. Radina; V. N. Andreev; Oleg Korchagin; O. V. Tripachev; V. T. Novikov. Oxygen Reaction at Carbonaceous Materials with Different Structure in Electrolytes Based on Lithium Perchlorate and Aprotic Solvents. Russian Journal of Electrochemistry 2019, 55, 878 -888.

AMA Style

V. A. Bogdanovskaya, N. V. Panchenko, M. V. Radina, V. N. Andreev, Oleg Korchagin, O. V. Tripachev, V. T. Novikov. Oxygen Reaction at Carbonaceous Materials with Different Structure in Electrolytes Based on Lithium Perchlorate and Aprotic Solvents. Russian Journal of Electrochemistry. 2019; 55 (9):878-888.

Chicago/Turabian Style

V. A. Bogdanovskaya; N. V. Panchenko; M. V. Radina; V. N. Andreev; Oleg Korchagin; O. V. Tripachev; V. T. Novikov. 2019. "Oxygen Reaction at Carbonaceous Materials with Different Structure in Electrolytes Based on Lithium Perchlorate and Aprotic Solvents." Russian Journal of Electrochemistry 55, no. 9: 878-888.

Journal article
Published: 01 September 2019 in Russian Journal of Electrochemistry
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To perform the oxygen reduction reaction effectively, the active layer of the lithium–oxygen battery positive electrode must have developed surface possessing a complicated pore structure. During discharge (the oxygen reaction cathodic component), the electrode accumulates lithium peroxide, a final product of electrochemical and chemical reactions (resulting in the conjunction of lithium ions, oxygen molecules. and electrons); the latter undergoes oxidation (the oxygen reaction anodic component) during the lithium–oxygen battery charging. The lithium peroxide is a water-insoluble compound that has no electronic conduction; when depositing on the electrode surface it seals openings of narrow pores and prevents oxygen penetration therein. To obtain more lithium peroxide via oxygen reduction in the presence of lithium ions, a cluster of large pores, practically unsealed with the lithium peroxide, is produced in the active layer; the pores supply oxygen deep into the active layer. The Li2O2 accumulation occurs in a cluster of lesser pores with developed surface. In the creating of the lithium–oxygen battery positive electrode active layer optimal structure, the difficulty is that some key quantities are unknown in advance. They are the large-scale and lesser pore average size and their volume fractions in the active layer. To solve the problem, the regular biporous model of the pore structure can be used. In the model, the pore radii are strictly fixed. This opens a relatively easy way for the interconnecting, by calculations, of parameters and the lithium–oxygen battery dimensioning specifications during its discharge. This work aimed at the proposing of the positive electrode active layer regular biporous model and developing of a procedure for the calculating of the lithium–oxygen battery dimensioning specifications during the discharge. it is shown, in a specific context, how the varying of the positive electrode active layer structure and the oxygen consumption constant k can control the Li2O2 accumulation.

ACS Style

Yu. G. Chirkov; V. N. Andreev; V. I. Rostokin; V. A. Bogdanovskaya. Regular Biporous Model of Active Layer of the Lithium–Oxygen Battery Positive Electrode. Russian Journal of Electrochemistry 2019, 55, 860 -870.

AMA Style

Yu. G. Chirkov, V. N. Andreev, V. I. Rostokin, V. A. Bogdanovskaya. Regular Biporous Model of Active Layer of the Lithium–Oxygen Battery Positive Electrode. Russian Journal of Electrochemistry. 2019; 55 (9):860-870.

Chicago/Turabian Style

Yu. G. Chirkov; V. N. Andreev; V. I. Rostokin; V. A. Bogdanovskaya. 2019. "Regular Biporous Model of Active Layer of the Lithium–Oxygen Battery Positive Electrode." Russian Journal of Electrochemistry 55, no. 9: 860-870.

Short communication
Published: 22 August 2019 in Chemical Engineering Science
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Oxygen reduction/evolution reactions (ORR/OER) engineering is the crucial problem of lithium-oxygen battery (LOB) R&D. This work shows that the influence of the pore structure of an active material exceeds the influence of its catalytic properties in ORR/OER in terms of LOB capacity. An original approach to the LOB scaling-up is suggested that is partially based on the principles of the cathode operation in hydrogen-oxygen fuel cell. The discharge capacity of the scaled-up LOB reaches 0.375 A h at the positive electrode surface area of 25 cm2, which is at the level of the best results for LOBs with an aprotic electrolyte described earlier.

ACS Style

Oleg V. Korchagin; Vera A. Bogdanovskaya; Oleg V. Tripachev; Marina V. Radina; Vladimir N. Andreev. Oxygen reduction/evolution reactions engineering for lithium-oxygen battery scaling-up. Chemical Engineering Science 2019, 209, 115164 .

AMA Style

Oleg V. Korchagin, Vera A. Bogdanovskaya, Oleg V. Tripachev, Marina V. Radina, Vladimir N. Andreev. Oxygen reduction/evolution reactions engineering for lithium-oxygen battery scaling-up. Chemical Engineering Science. 2019; 209 ():115164.

Chicago/Turabian Style

Oleg V. Korchagin; Vera A. Bogdanovskaya; Oleg V. Tripachev; Marina V. Radina; Vladimir N. Andreev. 2019. "Oxygen reduction/evolution reactions engineering for lithium-oxygen battery scaling-up." Chemical Engineering Science 209, no. : 115164.

Journal article
Published: 01 November 2018 in Protection of Metals and Physical Chemistry of Surfaces
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The results of computerized simulation of the process of formation of lithium peroxide attending the discharge of lithium–oxygen power source, in individual pore of constant radius are presented. It is found that, in the model of porous cathode (pores are tortuous, noncrossing, and of the same radius), variation of specific surface of the pores (decrease of pore radius) does not enable a possibility to increase notably the value of specific capacity of the cathode. A necessity of presence of both macropores, and micro- and mesopores in the structure of the active material was discussed. The effect of porous structure of the cathode on the discharge characteristics of LOPS was experimentally demonstrated by the example of some cathode materials (carbon blacks and carbon nanotubes). The highest discharge capacity was achieved with use of the sample of CNT-TNaOH combining pores of various sizes, which corresponds to the formulated hypotheses about an optimal structure of the active cathode material.

ACS Style

V. A. Bogdanovskaya; Yu. G. Chirkov; V. I. Rostokin; V. V. Yemetz; O. V. Korchagin; V. N. Andreev; O. V. Tripachev. The Effect of the Structure of a Positive Electrode on the Process of Discharge of a Lithium–Oxygen Power Source. The Monoporous Cathode Theory. Protection of Metals and Physical Chemistry of Surfaces 2018, 54, 1015 -1025.

AMA Style

V. A. Bogdanovskaya, Yu. G. Chirkov, V. I. Rostokin, V. V. Yemetz, O. V. Korchagin, V. N. Andreev, O. V. Tripachev. The Effect of the Structure of a Positive Electrode on the Process of Discharge of a Lithium–Oxygen Power Source. The Monoporous Cathode Theory. Protection of Metals and Physical Chemistry of Surfaces. 2018; 54 (6):1015-1025.

Chicago/Turabian Style

V. A. Bogdanovskaya; Yu. G. Chirkov; V. I. Rostokin; V. V. Yemetz; O. V. Korchagin; V. N. Andreev; O. V. Tripachev. 2018. "The Effect of the Structure of a Positive Electrode on the Process of Discharge of a Lithium–Oxygen Power Source. The Monoporous Cathode Theory." Protection of Metals and Physical Chemistry of Surfaces 54, no. 6: 1015-1025.

Journal article
Published: 23 April 2018 in Alternative Energy and Ecology (ISJAEE)
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Анализируется характерная особенность процесса разряда литий-кислородного источника тока (ЛКИТ) с электролитом на основе апротонного растворителя, которая заключается в закупорке пор положительного электрода не растворимым в электролите и неэлектропроводным продуктом реакции – пероксидом лития, Li2O2. Данный продукт образуется в результате многостадийной реакции, происходящей в процессе восстановления кислорода в присутствии ионов лития. При обратном (анодном) процессе – заряде ЛКИТ – происходит разложение накопленного при разряде пероксида лития на ионы лития, молекулы кислорода и электроны. При проведении разряда ЛКИТ желательно получить по возможности большое количество Li2O2, однако Li2O2 «закрывает» поры катода, препятствует поступлению в них кислорода, что затрудняет его дальнейшую наработку. Как показывают расчеты, катодный процесс разряда удается осуществить в основном в сравнительно тонком пористом слое, граничащем с газовой фазой. Поэтому, если не применять специальных мер, емкость, рассчитанная на квадратный сантиметр внешней поверхности катода, оказывается небольшой. Обычно при исследовании функционирования активного слоя катода выбирают для главной константы процесса заряда ЛКИТ – расход кислорода, который характеризуется параметром k, – одно определенное значение и работают с ним. В данной статье средствами компьютерного моделирования проводится варьирование параметра k в широких пределах. Показано, как при этом изменяются габаритные характеристики катода ЛКИТ. Объяснены причины происходящих в порах катода изменений. В результате проведенного исследования установлено, что с уменьшением константы k(что вело к снижению расхода кислорода, предназначенного для получения пероксида лития) и увеличением радиуса пор (при переходе от микропор к мезопорам) удельная емкость катода и количество накопленного Li2O2 уже не убывало, а возрастало.

ACS Style

Y. G. Chirkov; V. N. Andreev; V. I. Rostokin; V. A. Bogdanovskaya. DISCHARGE OF LITHIUM-OXYGEN POWER SOURCE: MONOPOROUS CATHODE THEORY AND ROLE OF CONSTANT OF OXYGEN CONSUMPTION PROCESS. Alternative Energy and Ecology (ISJAEE) 2018, 95-107 .

AMA Style

Y. G. Chirkov, V. N. Andreev, V. I. Rostokin, V. A. Bogdanovskaya. DISCHARGE OF LITHIUM-OXYGEN POWER SOURCE: MONOPOROUS CATHODE THEORY AND ROLE OF CONSTANT OF OXYGEN CONSUMPTION PROCESS. Alternative Energy and Ecology (ISJAEE). 2018; (4-6):95-107.

Chicago/Turabian Style

Y. G. Chirkov; V. N. Andreev; V. I. Rostokin; V. A. Bogdanovskaya. 2018. "DISCHARGE OF LITHIUM-OXYGEN POWER SOURCE: MONOPOROUS CATHODE THEORY AND ROLE OF CONSTANT OF OXYGEN CONSUMPTION PROCESS." Alternative Energy and Ecology (ISJAEE) , no. 4-6: 95-107.

Journal article
Published: 01 December 2017 in Russian Journal of Electrochemistry
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Laccase is an enzyme that is used for fabricating cathodes of biofuel cells. Many studies have been aimed at searching the ways for enhancing specific electrochemical characteristics of cathode with the laccase- based catalyst. The electroreduction of oxygen on the electrode with immobilized laccase proceeds under the conditions of direct electron transfer between the electrode and active enzyme center. In this work, the effect of oxygen partial pressure on the electrocatalytic activity of laccase is studied. It is shown that, at the concentrations of oxygen dissolved in the electrolyte higher than 0.28 mM, the process is controlled by the kinetics of the formation of laccase–oxygen complex, whereas at lower concentrations and a polarization higher than 0.3 V, the process is limited by the oxygen diffusion. A wide range of carbon materials are studied as the carriers for laccase immobilization: carbon black and nanotubes with various BET specific surface areas. The conditions, which provide the highest surface coverage of carbon material with enzyme in the course of spontaneous adsorptive immobilization and the highest specific characteristics when using a “floating” electrode simulating a gas-diffusion electrode, are determined: 0.2 M phosphate-acetate buffer solution; oxygen atmosphere; the carrier material (nanotubes with a BET surface area of 210 m2/g and a mesopore volume of 3.8 cm3/g); and the composition of active mass on the electrode (50 wt % of carbon material + 50 wt % of hydrophobized carbon black).

ACS Style

V. A. Bogdanovskaya; I. N. Arkad’Eva; M. A. Osina. Bioelectrocatalytic Oxygen Reduction by Laccase Immobilized on Various Carbon Carriers. Russian Journal of Electrochemistry 2017, 53, 1323 -1333.

AMA Style

V. A. Bogdanovskaya, I. N. Arkad’Eva, M. A. Osina. Bioelectrocatalytic Oxygen Reduction by Laccase Immobilized on Various Carbon Carriers. Russian Journal of Electrochemistry. 2017; 53 (12):1323-1333.

Chicago/Turabian Style

V. A. Bogdanovskaya; I. N. Arkad’Eva; M. A. Osina. 2017. "Bioelectrocatalytic Oxygen Reduction by Laccase Immobilized on Various Carbon Carriers." Russian Journal of Electrochemistry 53, no. 12: 1323-1333.

Journal article
Published: 20 August 2016 in Russian Journal of Electrochemistry
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ACS Style

V. A. Bogdanovskaya; E. M. Kol’Tsova; M. R. Tarasevich; M. V. Radina; G. V. Zhutaeva; A. V. Kuzov; N. N. Gavrilova. Highly active and stable catalysts based on nanotubes and modified platinum for fuel cells. Russian Journal of Electrochemistry 2016, 52, 723 -734.

AMA Style

V. A. Bogdanovskaya, E. M. Kol’Tsova, M. R. Tarasevich, M. V. Radina, G. V. Zhutaeva, A. V. Kuzov, N. N. Gavrilova. Highly active and stable catalysts based on nanotubes and modified platinum for fuel cells. Russian Journal of Electrochemistry. 2016; 52 (8):723-734.

Chicago/Turabian Style

V. A. Bogdanovskaya; E. M. Kol’Tsova; M. R. Tarasevich; M. V. Radina; G. V. Zhutaeva; A. V. Kuzov; N. N. Gavrilova. 2016. "Highly active and stable catalysts based on nanotubes and modified platinum for fuel cells." Russian Journal of Electrochemistry 52, no. 8: 723-734.

Journal article
Published: 29 July 2016 in Protection of Metals and Physical Chemistry of Surfaces
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ACS Style

O. V. Korchagin; M. R. Tarasevich; O. V. Tripachev; V. A. Bogdanovskaya. Catalysis of oxygen reaction on positive electrode of a lithium–oxygen cell in the presence of metallic nanosystems. Protection of Metals and Physical Chemistry of Surfaces 2016, 52, 581 -589.

AMA Style

O. V. Korchagin, M. R. Tarasevich, O. V. Tripachev, V. A. Bogdanovskaya. Catalysis of oxygen reaction on positive electrode of a lithium–oxygen cell in the presence of metallic nanosystems. Protection of Metals and Physical Chemistry of Surfaces. 2016; 52 (4):581-589.

Chicago/Turabian Style

O. V. Korchagin; M. R. Tarasevich; O. V. Tripachev; V. A. Bogdanovskaya. 2016. "Catalysis of oxygen reaction on positive electrode of a lithium–oxygen cell in the presence of metallic nanosystems." Protection of Metals and Physical Chemistry of Surfaces 52, no. 4: 581-589.

Journal article
Published: 08 April 2016 in Kataliz v promyshlennosti
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Методом пиролиза азотсодержащих комплексов железа и кобальта на поверхности высокодисперсных углеродных материалов синтезированы катодные катализаторы для водородо-кислородного топливного элемента (ТЭ) с протонпроводящим (кислым) и анионпроводящим (щелочным) электролитами. Катализаторы охарактеризованы методом РФЭС, испытаны в модельных условиях на тонкослойном дисковом электроде и в составе МЭБ водородо-кислородных ТЭ. Впервые описаны свойства системы CoFe/С, сформированной путем пиролиза макрогетероциклических соединений кобальта и железа на углеродных материалах (саже ХС-72 и многослойных нанотрубках (МНТ)). По данным РФЭС, поверхность каталитических систем CoFe/С обогащена углеродом (95,5 ат.%), содержит азот (2 ат.%), кислород (2 ат.%) и металлы (0,5 ат.%). Согласно результатам электрохимических измерений в модельных условиях, каталитические системы состава CoFe/МНТ приближаются к коммерческому платиновому катализатору 60% Pt/C (HiSPEC9100) по активности в реакции восстановления кислорода в щелочной среде (0,5 М КОН). Значения потенциала полуволны составляют 0,85 и 0,88 В для катализаторов CoFe/МНТ и 60% Pt/C (HiSPEC9100) соответственно. Максимальная удельная мощность водородо-кислородного ТЭ с анионпроводящим электролитом составила 210 мВт/см2 (катод на основе 60% Pt/C (HiSPEC9100)) и 180 мВт/см2 (катод на основе CoFe/МНТ). Характеристики МЭБ с неплатиновым катодом соответствуют лучшим аналогам, описанным в литературе. Результаты работы показали перспективность дальнейших исследований по масштабированию технологии синтеза предложенных неплатиновых катодных катализаторов и оптимизации архитектуры МЭБ ТЭ на их основе.

ACS Style

O. V. Korchagin; V. A. Bogdanovskaya; M. R. Tarasevich; A. V. Kuzov; G. V. Zhutaeva; M. V. Radina; V. T. Novikov; V. V. Zharikov. Properties of Cathode Non-Platinum Catalysts for Oxyhydrogen Fuel Cell with Proton- and Anion-conducting Electrolytes. Kataliz v promyshlennosti 2016, 16, 48 -56.

AMA Style

O. V. Korchagin, V. A. Bogdanovskaya, M. R. Tarasevich, A. V. Kuzov, G. V. Zhutaeva, M. V. Radina, V. T. Novikov, V. V. Zharikov. Properties of Cathode Non-Platinum Catalysts for Oxyhydrogen Fuel Cell with Proton- and Anion-conducting Electrolytes. Kataliz v promyshlennosti. 2016; 16 (2):48-56.

Chicago/Turabian Style

O. V. Korchagin; V. A. Bogdanovskaya; M. R. Tarasevich; A. V. Kuzov; G. V. Zhutaeva; M. V. Radina; V. T. Novikov; V. V. Zharikov. 2016. "Properties of Cathode Non-Platinum Catalysts for Oxyhydrogen Fuel Cell with Proton- and Anion-conducting Electrolytes." Kataliz v promyshlennosti 16, no. 2: 48-56.

Journal article
Published: 01 January 2016 in Russian Journal of Electrochemistry
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ACS Style

E. M. Kol’Tsova; V. A. Bogdanovskaya; M. R. Tarasevich; Violetta Vasilenko; M. M. Stankevich; E. B. Filippova; A. A. Khoroshavina. Computer aided simulation of hydrogen–oxygen (air) fuel cell with regard to the degradation mechanism of platinum catalyst on the cathode. Russian Journal of Electrochemistry 2016, 52, 53 -62.

AMA Style

E. M. Kol’Tsova, V. A. Bogdanovskaya, M. R. Tarasevich, Violetta Vasilenko, M. M. Stankevich, E. B. Filippova, A. A. Khoroshavina. Computer aided simulation of hydrogen–oxygen (air) fuel cell with regard to the degradation mechanism of platinum catalyst on the cathode. Russian Journal of Electrochemistry. 2016; 52 (1):53-62.

Chicago/Turabian Style

E. M. Kol’Tsova; V. A. Bogdanovskaya; M. R. Tarasevich; Violetta Vasilenko; M. M. Stankevich; E. B. Filippova; A. A. Khoroshavina. 2016. "Computer aided simulation of hydrogen–oxygen (air) fuel cell with regard to the degradation mechanism of platinum catalyst on the cathode." Russian Journal of Electrochemistry 52, no. 1: 53-62.