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Prof. Young-Soo Yoon
Gachon University, Seongnam-si, Gyeonggi-do, Korea

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Research Keywords & Expertise

0 Anion exchange membranes
0 quaternized polymer reaction
0 cross-linking polymer backbone
0 Quaternized chitosan for fuel cell application
0 Quaternized polymer blend

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Anion exchange membranes
Quaternized chitosan for fuel cell application
quaternized poly vinylbenzyl chloride

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Original article
Published: 05 July 2021 in Journal of the Korean Ceramic Society
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ACS Style

Hyeong Chul Roh; In Yea Kim; Tae Young Ahn; Hae-Won Cheong; Young Soo Yoon. Influence of temperature on performance of CuV2O6 cathode for high voltage thermal battery. Journal of the Korean Ceramic Society 2021, 1 -12.

AMA Style

Hyeong Chul Roh, In Yea Kim, Tae Young Ahn, Hae-Won Cheong, Young Soo Yoon. Influence of temperature on performance of CuV2O6 cathode for high voltage thermal battery. Journal of the Korean Ceramic Society. 2021; ():1-12.

Chicago/Turabian Style

Hyeong Chul Roh; In Yea Kim; Tae Young Ahn; Hae-Won Cheong; Young Soo Yoon. 2021. "Influence of temperature on performance of CuV2O6 cathode for high voltage thermal battery." Journal of the Korean Ceramic Society , no. : 1-12.

Journal article
Published: 16 April 2021 in Nanomaterials
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Direct urea fuel cells (DUFCs) have recently drawn increased attention as sustainable power generation devices because of their considerable advantages. Nonetheless, the kinetics of the oxidation-reduction reaction, particularly the electrochemical oxidation and oxygen reduction reaction (ORR), in direct urea fuel cells are slow and hence considered to be inefficient. To overcome these disadvantages in DUFCs, Pd nanoparticles loaded onto Co3O4 supported by multi-walled carbon nanotubes (Pd/[email protected]) were employed as a promising cathode catalyst for enhancing the electrocatalytic activity and oxygen reduction reaction at the cathode in DUFCs. [email protected] and Pd/[email protected] were synthesized via a facile two-step hydrothermal process. A Pd/MWCNT catalyst was also prepared and evaluated to study the effect of Co3O4 on the performance of the Pd/[email protected] catalyst. A current density of 13.963 mA cm−2 and a maximum power density of 2.792 mW cm−2 at 20 °C were obtained. Pd/[email protected] is a prospectively effective cathode catalyst for DUFCs. The dilution of Pd with non-precious metal oxides in adequate amounts is economically conducive to highly practical catalysts with promising electrocatalytic activity in fuel cell applications.

ACS Style

Nguyen-Huu-Hung Tuyen; Hyun-Gil Kim; Young-Soo Yoon. Effect of Co3O4 Nanoparticles on Improving Catalytic Behavior of Pd/Co3O4@MWCNT Composites for Cathodes in Direct Urea Fuel Cells. Nanomaterials 2021, 11, 1017 .

AMA Style

Nguyen-Huu-Hung Tuyen, Hyun-Gil Kim, Young-Soo Yoon. Effect of Co3O4 Nanoparticles on Improving Catalytic Behavior of Pd/Co3O4@MWCNT Composites for Cathodes in Direct Urea Fuel Cells. Nanomaterials. 2021; 11 (4):1017.

Chicago/Turabian Style

Nguyen-Huu-Hung Tuyen; Hyun-Gil Kim; Young-Soo Yoon. 2021. "Effect of Co3O4 Nanoparticles on Improving Catalytic Behavior of Pd/Co3O4@MWCNT Composites for Cathodes in Direct Urea Fuel Cells." Nanomaterials 11, no. 4: 1017.

Erratum
Published: 11 March 2021 in Journal of Alloys and Compounds
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ACS Style

Jaehwan Ko; Do Hyun Cho; Dong-Joo Kim; Young Soo Yoon. Corrigendum to “Suppression of formation of lithium dendrite via surface modification by 2-D lithium phosphorous oxynitride as a highly stable anode for metal lithium batteries” [J. Alloy. Compd. 845 (2020) 156280]. Journal of Alloys and Compounds 2021, 159433 .

AMA Style

Jaehwan Ko, Do Hyun Cho, Dong-Joo Kim, Young Soo Yoon. Corrigendum to “Suppression of formation of lithium dendrite via surface modification by 2-D lithium phosphorous oxynitride as a highly stable anode for metal lithium batteries” [J. Alloy. Compd. 845 (2020) 156280]. Journal of Alloys and Compounds. 2021; ():159433.

Chicago/Turabian Style

Jaehwan Ko; Do Hyun Cho; Dong-Joo Kim; Young Soo Yoon. 2021. "Corrigendum to “Suppression of formation of lithium dendrite via surface modification by 2-D lithium phosphorous oxynitride as a highly stable anode for metal lithium batteries” [J. Alloy. Compd. 845 (2020) 156280]." Journal of Alloys and Compounds , no. : 159433.

Paper
Published: 21 February 2021 in Journal of Materials Chemistry A
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In this study, a three-dimensional SnFeP nanocube was prepared, and then PdFe alloy was decorated over it. A single cell with PdFe/[email protected] anode catalysts exhibited promising power densities in ethanol and hydrogen fuels at low temperature.

ACS Style

Dimpul Konwar; Padmini Basumatary; Unho Lee; Young Soo Yoon. P-doped SnFe nanocubes decorated with PdFe alloy nanoparticles for ethanol fuel cells. Journal of Materials Chemistry A 2021, 9, 10685 -10694.

AMA Style

Dimpul Konwar, Padmini Basumatary, Unho Lee, Young Soo Yoon. P-doped SnFe nanocubes decorated with PdFe alloy nanoparticles for ethanol fuel cells. Journal of Materials Chemistry A. 2021; 9 (17):10685-10694.

Chicago/Turabian Style

Dimpul Konwar; Padmini Basumatary; Unho Lee; Young Soo Yoon. 2021. "P-doped SnFe nanocubes decorated with PdFe alloy nanoparticles for ethanol fuel cells." Journal of Materials Chemistry A 9, no. 17: 10685-10694.

Data article
Published: 01 December 2020 in Data in Brief
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This data provides the observation of the interface between lithium phosphorus oxynitride(LiPON) film and lithium layer. In other words, the shape of the lithium electrode protected by the LiPON film after the dissolution/precipitation cycle is provided as images. Also, for clear interpretation of these images, the shape of lithium formed between LiPON and copper current collector is provided as images. Readers are requested to go through the article entitled “Suppression of formation of lithium dendrite via surface modification by 2-D lithium phosphorus oxynitride as a highly stable anode for metal lithium batteries” (Ko et al., 2020) for further interpretation and discussion. Since the article provided only surface images for the above-mentioned items, it is expected that the cross-sectional images provided in this data will help readers to understand the overall contents in depth.

ACS Style

Jaehwan Ko; Young Soo Yoon. Data on the observation of the interface between lithium phosphorus oxynitride film and lithium layer. Data in Brief 2020, 33, 106612 .

AMA Style

Jaehwan Ko, Young Soo Yoon. Data on the observation of the interface between lithium phosphorus oxynitride film and lithium layer. Data in Brief. 2020; 33 ():106612.

Chicago/Turabian Style

Jaehwan Ko; Young Soo Yoon. 2020. "Data on the observation of the interface between lithium phosphorus oxynitride film and lithium layer." Data in Brief 33, no. : 106612.

Journal article
Published: 17 November 2020 in Polymers
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An efficient and effective process for the production of high-performance anion exchange membranes (AEMs) is necessary for the commercial application of fuel cells. Therefore, in this study, quaternized poly vinylbenzyl chloride (QVBC) and polysulfone were composited with glycidyltrimethylammonium-chloride-quaternized chitosan (QCS) at different ratios (viz., 1 wt %, 5 wt %, and 10 wt %). The structure and morphology of the membranes were characterized by Fourier transform infrared spectroscopy and scanning electron microscopy, respectively. Further, the water uptake, swelling ratio, and ionic conductivities of the composite membrane at different wt % of QCS were evaluated. The membrane with 5% QCS exhibited an ionic conductivity of 49.6 mS/cm and 130 mS/cm at 25 °C and 70 °C, respectively.

ACS Style

Le Thi Tuyet Nhung; In Yea Kim; Young Soo Yoon. Quaternized Chitosan-Based Anion Exchange Membrane Composited with Quaternized Poly(vinylbenzyl chloride)/Polysulfone Blend. Polymers 2020, 12, 2714 .

AMA Style

Le Thi Tuyet Nhung, In Yea Kim, Young Soo Yoon. Quaternized Chitosan-Based Anion Exchange Membrane Composited with Quaternized Poly(vinylbenzyl chloride)/Polysulfone Blend. Polymers. 2020; 12 (11):2714.

Chicago/Turabian Style

Le Thi Tuyet Nhung; In Yea Kim; Young Soo Yoon. 2020. "Quaternized Chitosan-Based Anion Exchange Membrane Composited with Quaternized Poly(vinylbenzyl chloride)/Polysulfone Blend." Polymers 12, no. 11: 2714.

Journal article
Published: 03 July 2020 in Journal of Alloys and Compounds
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Lithium phosphorous oxynitride (LiPON) is a thin film solid electrolyte with an amorphous structure and is the most applied material in the thin film battery industry. Herein, LiPON and LiPON/LiPO thin films were directly deposited on a Li foil by the RF sputtering method and evaluated as a protective film to improve the stability of the Li anode. The structural properties of the LiPON and LiPO thin films were confirmed by analytical methods, such as X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy, and the ionic conductivity of both thin films was confirmed. Based on these results, cycling evaluation, using Li│Li symmetric cells and LiCoO2│Li cells, confirmed the performance of LiPON and LiPON/LiPO thin films as Li anode protective films. In the cycling evaluation of Li│Li symmetric cells, according to the thickness of the LiPON thin film, the thickness of 200 nm produces the best stability and performance. The 200-nm-thick LiPON protection film and 200-nm-thick LiPON/LiPO protection film were shown to improve the stability of the Li anode in the cycling evaluation of Li│Li symmetric cells and LiCoO2│Li cells.

ACS Style

Jaehwan Ko; Do Hyun Cho; Dong-Joo Kim; Young Soo Yoon. Suppression of formation of lithium dendrite via surface modification by 2-D lithium phosphorous oxynitride as a highly stable anode for metal lithium batteries. Journal of Alloys and Compounds 2020, 845, 156280 .

AMA Style

Jaehwan Ko, Do Hyun Cho, Dong-Joo Kim, Young Soo Yoon. Suppression of formation of lithium dendrite via surface modification by 2-D lithium phosphorous oxynitride as a highly stable anode for metal lithium batteries. Journal of Alloys and Compounds. 2020; 845 ():156280.

Chicago/Turabian Style

Jaehwan Ko; Do Hyun Cho; Dong-Joo Kim; Young Soo Yoon. 2020. "Suppression of formation of lithium dendrite via surface modification by 2-D lithium phosphorous oxynitride as a highly stable anode for metal lithium batteries." Journal of Alloys and Compounds 845, no. : 156280.

Journal article
Published: 19 June 2020 in Energies
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We suggest an alternative to conventional coating methods for accident-tolerant fuel (ATF) cladding. A Zircaloy-4 tube was inserted into metal tubes of different materials and the inserted tubes were subjected to physical force at room temperature. The manufactured tube exhibited a pseudo-single tube (PST) structure and had higher thermal stability than a Zircaloy-4 tube. Optical microscopy and scanning electron microscopy images showed that the PST had a uniform and well-bonded interface structure, i.e., no gaps or voids were found at the interface between the inner and outer tubes. Energy-dispersive X-ray spectroscopy analysis confirmed that the metal components did not interdiffuse at the interface of the PST, even after being kept at 600 and 900 °C for 1 h and rapidly cooled to room temperature. Unlike pure Zircaloy-4 tubes, Zircaloy-4/stainless use steel (SUS) 316 PST did not show significant structural collapse, even after being stored at 1200 °C for 1 h. Based on these results, if a PST was fabricated using a Zircaloy-4 tube thinner than the Zircaloy-4 tube used in this study and an outer tube of micron-scale thickness, swaging may be a feasible alternative to Zircaloy-4-based ATF cladding.

ACS Style

Dae Yun Kim; You Na Lee; Joon Han Kim; Yonghee Kim; Young Soo Yoon. Applicability of Swaging as an Alternative for the Fabrication of Accident-Tolerant Fuel Cladding. Energies 2020, 13, 3182 .

AMA Style

Dae Yun Kim, You Na Lee, Joon Han Kim, Yonghee Kim, Young Soo Yoon. Applicability of Swaging as an Alternative for the Fabrication of Accident-Tolerant Fuel Cladding. Energies. 2020; 13 (12):3182.

Chicago/Turabian Style

Dae Yun Kim; You Na Lee; Joon Han Kim; Yonghee Kim; Young Soo Yoon. 2020. "Applicability of Swaging as an Alternative for the Fabrication of Accident-Tolerant Fuel Cladding." Energies 13, no. 12: 3182.

Review article
Published: 08 June 2020 in Ceramics International
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Lithium phosphorus oxynitride (LiPON) is the most representative solid electrolyte in thin film battery applications. In addition, it has been used as an interfacial protective layer to improve the stability of cathode and anode materials. In this article, we review the effect of the process conditions on the structural and electrochemical properties of LiPON thin films. A common method to form LiPON thin films is radiofrequency (RF) sputtering; much research has been conducted to optimize the corresponding process parameters, such as RF power density, working pressure in nitrogen atmosphere, substrate temperature, substrate bias power, post-annealing, and sputtering target. Many studies have characterized LiPON films obtained with various process parameters, but significant differences have been observed in the reported trends. The most representative difference involves the Nt/Nd ratio, which has been reported to be either directly or inversely proportional to the ionic conductivity. Recently, controversial results have been obtained on the N-based local structure of LiPON thin films. The structural argument relies on the idea that nitridation promotes cross-linking via the formation of doubly and triply coordinated N bridges between P atoms. In addition to further research to clarify these issues, it is necessary to introduce new methods for the interpretation of data based on it.

ACS Style

Jaehwan Ko; Young Soo Yoon. Influence of process conditions on structural and electrochemical properties of lithium phosphorus oxynitride thin films. Ceramics International 2020, 46, 20623 -20632.

AMA Style

Jaehwan Ko, Young Soo Yoon. Influence of process conditions on structural and electrochemical properties of lithium phosphorus oxynitride thin films. Ceramics International. 2020; 46 (13):20623-20632.

Chicago/Turabian Style

Jaehwan Ko; Young Soo Yoon. 2020. "Influence of process conditions on structural and electrochemical properties of lithium phosphorus oxynitride thin films." Ceramics International 46, no. 13: 20623-20632.

Journal article
Published: 22 May 2020 in International Journal of Hydrogen Energy
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Tri-metallic MnNiFe alloy nanoparticles with four different Mn:Ni:Fe weight ratios (0.5:2.0:0.5, 0.5:1.0:0.5, 1.0:1.0:1.0, and 2.0:0.5:2.0) on reduced graphene oxide (rGO) supports were synthesized using a one-pot hydrothermal method. The as-prepared catalysts were characterized by X-ray diffraction, inductively coupled plasma-mass spectroscopy, Brunauer-Emmett-Teller analysis, scanning electron microscopy, and transmission electron microscopy, and their catalytic activities were measured by cyclic voltammetry and chronoamperometry. In urea electro-oxidation, the Mn0.5Ni2.0Fe0.5/rGO catalyst exhibited superior electrocatalytic activity compared to Ni/rGO and commercial Ni/C. The Mn0.5Ni2.0Fe0.5/rGO catalyst exhibited a mass activity of 1753.97 mA mg−1Ni, along with an onset potential of 0.34 V (vs. Ag/AgCl) in 1.0 M KOH and 0.33 M urea solution, which is ~4.2 times and 9.8 times higher than those of Ni/rGO and commercial Ni/C, respectively. Furthermore, a single cell comprising of Mn0.5Ni2.0Fe0.5/rGO catalyst exhibited a peak power density of 30.08 mW cm−2 in 0.33 M urea and 1.0 M KOH at 50 °C.

ACS Style

Padmini Basumatary; Un Ho Lee; Dimpul Konwar; Young Soo Yoon. An efficient tri-metallic anodic electrocatalyst for urea electro-oxidation. International Journal of Hydrogen Energy 2020, 45, 32770 -32779.

AMA Style

Padmini Basumatary, Un Ho Lee, Dimpul Konwar, Young Soo Yoon. An efficient tri-metallic anodic electrocatalyst for urea electro-oxidation. International Journal of Hydrogen Energy. 2020; 45 (57):32770-32779.

Chicago/Turabian Style

Padmini Basumatary; Un Ho Lee; Dimpul Konwar; Young Soo Yoon. 2020. "An efficient tri-metallic anodic electrocatalyst for urea electro-oxidation." International Journal of Hydrogen Energy 45, no. 57: 32770-32779.

Journal article
Published: 07 May 2020 in Energies
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Double-oxide Mn3O4-Co3O4 nanoparticles were synthesized and anchored on multiwalled carbon nanotubes (MWCNTs) via a single-step solvothermal method. The largest specific area (99.82 m2g−1) of the catalyst was confirmed via a nitrogen adsorption isotherm. Furthermore, the uniform coating of the Mn3O4-Co3O4 nanoparticles on the surface of the MWCNTs was observed via scanning electron microscopy and transmission electron microscopy; the uniform coating provided an effective transport pathway during the electrocatalytic activities. The rotating disk electrode and rotating ring disk electrode measurements indicated that the electron transfer number was 3.96 and the evolution of H2O2 was 2%. In addition, the Mn3O4-Co3O4/MWCNT catalyst did not undergo urea poisoning and remained stable in an alkaline solution. Conversely, commercial Pt/C could not withstand urea poisoning for long. The performance cell achieved a power density of 0.4226 mW cm−2 at 50 °C. Therefore, Mn3O4-Co3O4/MWCNT is an efficient and inexpensive noble-metal-free cathodic catalyst for direct urea fuel cells.

ACS Style

Thi Ngoc Tuyen Pham; Young Soo Yoon. Development of Nanosized Mn3O4-Co3O4 on Multiwalled Carbon Nanotubes for Cathode Catalyst in Urea Fuel Cell. Energies 2020, 13, 2322 .

AMA Style

Thi Ngoc Tuyen Pham, Young Soo Yoon. Development of Nanosized Mn3O4-Co3O4 on Multiwalled Carbon Nanotubes for Cathode Catalyst in Urea Fuel Cell. Energies. 2020; 13 (9):2322.

Chicago/Turabian Style

Thi Ngoc Tuyen Pham; Young Soo Yoon. 2020. "Development of Nanosized Mn3O4-Co3O4 on Multiwalled Carbon Nanotubes for Cathode Catalyst in Urea Fuel Cell." Energies 13, no. 9: 2322.

Journal article
Published: 26 April 2020 in Journal of the Korean Physical Society
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In this study, a textile-based stretch sensor with a polymer/conductor/polymer structure was fabricated using a paste of multiwalled carbon nanotubes (MWCNTs) as the conductive material. A simple and practical method that integrates with the manufacturing methods employed in the garment industry was designed. The stretch sensor showed varying performance depending on the anchoring points, that is, the stretched part. When only the sensor was fixed, the linearity of the resistance and the sensitivity were good, though the durability was low. On the contrary, when the elastic band was fixed, the linearity of the resistance and sensitivity were low, and the durability was good. To verify whether the manufactured stretch sensor can be applied to body size measurement garments, we fabricated and evaluated a belt by measuring the waist and the hip sizes of 10 people. The strain spanned a wide range from 3% to 85%, and the resistance maintained its linearity. The results of this study indicate that the elastic difference between the stretch sensor and the surrounding fabric can lead to problems; hence, we suggest that materials and design be selected accordingly.

ACS Style

Mihret Mulugeta; Jaehwan Ko; Young Soo Yoon; Sun Hee Kim. A Textile-Based MWCNT-Coated Stretch Sensor for Body Size Measurements. Journal of the Korean Physical Society 2020, 76, 688 -694.

AMA Style

Mihret Mulugeta, Jaehwan Ko, Young Soo Yoon, Sun Hee Kim. A Textile-Based MWCNT-Coated Stretch Sensor for Body Size Measurements. Journal of the Korean Physical Society. 2020; 76 (8):688-694.

Chicago/Turabian Style

Mihret Mulugeta; Jaehwan Ko; Young Soo Yoon; Sun Hee Kim. 2020. "A Textile-Based MWCNT-Coated Stretch Sensor for Body Size Measurements." Journal of the Korean Physical Society 76, no. 8: 688-694.

Journal article
Published: 22 February 2020 in Ceramics International
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In this study, the structural and electrochemical properties of post-annealed lithium phosphorus oxynitride (LiPON) thin films were confirmed. LiPON thin films were deposited using a radio-frequency sputtering method, and post-annealing was performed in the temperature range of 100–400 °C. Compared with the initial as-depo state, the impedance decreased at temperatures of 100 and 200 °C, and it again increased at 300 and 400 °C. As a result, the lowest impedance was seen at 200 °C, and it increased significantly at 400 °C. To verify the cause of the electrochemical changes, the structural properties of the post-annealed LiPON thin films were confirmed using analytical methods, including X-ray diffraction (XRD), scanning electron microscope (SEM), and X-ray photoelectron spectroscopy (XPS). XRD and SEM analysis showed that the LiPON thin film prepared in this study had a typical amorphous structure and no change in crystal structure and morphology occurred at 400 °C. XPS analysis showed that the Li1s/P2p ratio had the greatest effect on the impedance change, according to the post-annealing temperature of LiPON thin films. The ionic conductivity evaluation of the five samples showed that 200 °C post-annealing was effective in increasing the ionic conductivity of LiPON thin films, and the effect was reproducible.

ACS Style

Jaehwan Ko; Young Soo Yoon. Effect of post-annealing on structural and electrochemical properties of lithium phosphorus oxynitride thin film. Ceramics International 2020, 46, 14071 -14077.

AMA Style

Jaehwan Ko, Young Soo Yoon. Effect of post-annealing on structural and electrochemical properties of lithium phosphorus oxynitride thin film. Ceramics International. 2020; 46 (9):14071-14077.

Chicago/Turabian Style

Jaehwan Ko; Young Soo Yoon. 2020. "Effect of post-annealing on structural and electrochemical properties of lithium phosphorus oxynitride thin film." Ceramics International 46, no. 9: 14071-14077.

Journal article
Published: 03 February 2020 in Applied Catalysis B: Environmental
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A novel and unique PtSc0.5Ni/[email protected] catalyst possessing hybrid characteristics is prepared. Initially, three-dimensional nanoflower-like structures of MoS2 are deposited onto graphene sheets, and then PtScNi nanoparticles are grafted onto the [email protected] support. For optimization, catalysts with different doping ratios (x = 0.2, 0.5, and 1.0) of Sc are prepared and examined. The electrochemical performances of PtNi/[email protected], [email protected], and commercial Pt/C catalysts are further evaluated for comparison. A single cell with the PtSc0.5Ni/[email protected] catalyst exhibits a maximum power density of 51.70 mW cm−2 at 50 °C in ethanol fuel, which is higher than previously reported values. The cell with commercial Pt/C catalyst, in contrast, displays a power density ∼3.7 times lower. Furthermore, the PtSc0.5Ni/[email protected] catalyzed single cell delivers promising power densities and stabilities in methane and synthetic biogas fuel containing CH4, CO2, and H2S.

ACS Style

Padmini Basumatarya; Dimpul Konwarb; Young Soo Yoon. Conductivity-tailored PtNi/MoS2 3D nanoflower catalyst via Sc doping as a hybrid anode for a variety of hydrocarbon fuels in proton exchange membrane fuel cells. Applied Catalysis B: Environmental 2020, 267, 118724 .

AMA Style

Padmini Basumatarya, Dimpul Konwarb, Young Soo Yoon. Conductivity-tailored PtNi/MoS2 3D nanoflower catalyst via Sc doping as a hybrid anode for a variety of hydrocarbon fuels in proton exchange membrane fuel cells. Applied Catalysis B: Environmental. 2020; 267 ():118724.

Chicago/Turabian Style

Padmini Basumatarya; Dimpul Konwarb; Young Soo Yoon. 2020. "Conductivity-tailored PtNi/MoS2 3D nanoflower catalyst via Sc doping as a hybrid anode for a variety of hydrocarbon fuels in proton exchange membrane fuel cells." Applied Catalysis B: Environmental 267, no. : 118724.

Journal article
Published: 07 October 2019 in Current Applied Physics
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The thermoelectric transport properties of Bi/Sn and Bi/Sb core/shell (C/S) nanowires grown by the method of on-film formation of nanowires were systematically investigated. The electrical conductivity and Seebeck coefficient of nanowires with different diameters were measured as a function of the temperature. The contribution of Sn and Sb shells to the total transport in the C/S nanowires was determined using analytical fitting based on the parallel combination of the conductive system model. The carrier-interface boundary scattering at the C/S interface was quantitatively evaluated as the sheet resistance. In addition, the effect of hole doping on the transport properties was also observed in the Bi/Sn C/S nanowires.

ACS Style

Hongjae Moon; Jeongmin Kim; Dong Won Chun; Seokkyoon Hong; Young Soo Yoon; Wooyoung Lee. Radial heterostructure and interface effects on thermoelectric transport properties of Bi/Sn and Bi/Sb core/shell nanowires. Current Applied Physics 2019, 20, 43 -48.

AMA Style

Hongjae Moon, Jeongmin Kim, Dong Won Chun, Seokkyoon Hong, Young Soo Yoon, Wooyoung Lee. Radial heterostructure and interface effects on thermoelectric transport properties of Bi/Sn and Bi/Sb core/shell nanowires. Current Applied Physics. 2019; 20 (1):43-48.

Chicago/Turabian Style

Hongjae Moon; Jeongmin Kim; Dong Won Chun; Seokkyoon Hong; Young Soo Yoon; Wooyoung Lee. 2019. "Radial heterostructure and interface effects on thermoelectric transport properties of Bi/Sn and Bi/Sb core/shell nanowires." Current Applied Physics 20, no. 1: 43-48.

Journal article
Published: 31 May 2019 in Journal of the Korean Ceramic Society
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ACS Style

Jaehwan Ko; Seung Ho Kang; Hae-Won Cheong; Young Soo Yoon. Recent Progress in Cathode Materials for Thermal Batteries. Journal of the Korean Ceramic Society 2019, 56, 233 -255.

AMA Style

Jaehwan Ko, Seung Ho Kang, Hae-Won Cheong, Young Soo Yoon. Recent Progress in Cathode Materials for Thermal Batteries. Journal of the Korean Ceramic Society. 2019; 56 (3):233-255.

Chicago/Turabian Style

Jaehwan Ko; Seung Ho Kang; Hae-Won Cheong; Young Soo Yoon. 2019. "Recent Progress in Cathode Materials for Thermal Batteries." Journal of the Korean Ceramic Society 56, no. 3: 233-255.

Journal article
Published: 23 May 2019 in Journal of Power Sources
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A solid solution Pd–Ni alloy co-sputtered on carbon paper (Pd–Ni/C) is explored as a catalyst in the flow-through porous anode of a direct urea fuel cell (DUFC). The catalytic performances of urea electro-oxidation in an alkaline medium are investigated by cyclic voltammetry and chronoamperometry. In order to minimize the effect of morphological variation by the Pd–Ni composition, the island structure with a uniform size or electrochemical surface area was prepared. The Pd–Ni/C electrode shows a much higher electrocatalytic activity and lower onset oxidation potential toward urea electro-oxidation compared to the Ag–Ni/C and Pt–Ni/C electrodes prepared by the same procedure. When the DUFC with a cell configuration of Pd–Ni/C anode and Pd/C cathode operates at room temperature, an open circuit voltage of 0.59 V was obtained with 0.33 molL−1 urea solution as anolyte and humidification oxygen as the catholyte. The DUFC also exhibits a maximum power density of 1.12 mWcm−2. The electrocatalytic activity by the developed solid solution is largely attributed to high intrinsic electronic conductivity, excellent porous network structures and a synergetic effect by the constituting bimetallic elements. This work develops a simple type of anode catalyst for DUFC, which can possibly open a promising approach for urea-rich wastewater treatment.

ACS Style

Jaesik Yoon; Doohee Lee; Yu Na Lee; Young Soo Yoon; Dong-Joo Kim. Solid solution palladium-nickel bimetallic anode catalysts by co-sputtering for direct urea fuel cells (DUFC). Journal of Power Sources 2019, 431, 259 -264.

AMA Style

Jaesik Yoon, Doohee Lee, Yu Na Lee, Young Soo Yoon, Dong-Joo Kim. Solid solution palladium-nickel bimetallic anode catalysts by co-sputtering for direct urea fuel cells (DUFC). Journal of Power Sources. 2019; 431 ():259-264.

Chicago/Turabian Style

Jaesik Yoon; Doohee Lee; Yu Na Lee; Young Soo Yoon; Dong-Joo Kim. 2019. "Solid solution palladium-nickel bimetallic anode catalysts by co-sputtering for direct urea fuel cells (DUFC)." Journal of Power Sources 431, no. : 259-264.

Journal article
Published: 01 March 2019 in Thin Solid Films
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ACS Style

Jaehwan Ko; Young Soo Yoon. Lithium fluoride layer formed by thermal evaporation for stable lithium metal anode in rechargeable batteries. Thin Solid Films 2019, 673, 119 -125.

AMA Style

Jaehwan Ko, Young Soo Yoon. Lithium fluoride layer formed by thermal evaporation for stable lithium metal anode in rechargeable batteries. Thin Solid Films. 2019; 673 ():119-125.

Chicago/Turabian Style

Jaehwan Ko; Young Soo Yoon. 2019. "Lithium fluoride layer formed by thermal evaporation for stable lithium metal anode in rechargeable batteries." Thin Solid Films 673, no. : 119-125.

Journal article
Published: 30 November 2018 in Journal of the Korean Ceramic Society
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ACS Style

Yoo Lim Cha; Il Han Park; Kyung Hwan Moon; Dong Hwan Kim; Seung Il Jung; Young Soo Yoon. Simultaneous Control of Phase Transformation and Crystal of Amorphous TiO2 Coating on MWCNT Surface. Journal of the Korean Ceramic Society 2018, 55, 618 -624.

AMA Style

Yoo Lim Cha, Il Han Park, Kyung Hwan Moon, Dong Hwan Kim, Seung Il Jung, Young Soo Yoon. Simultaneous Control of Phase Transformation and Crystal of Amorphous TiO2 Coating on MWCNT Surface. Journal of the Korean Ceramic Society. 2018; 55 (6):618-624.

Chicago/Turabian Style

Yoo Lim Cha; Il Han Park; Kyung Hwan Moon; Dong Hwan Kim; Seung Il Jung; Young Soo Yoon. 2018. "Simultaneous Control of Phase Transformation and Crystal of Amorphous TiO2 Coating on MWCNT Surface." Journal of the Korean Ceramic Society 55, no. 6: 618-624.

Journal article
Published: 14 November 2018 in Energies
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The polymer binder, poly(imide-co-siloxane) (PIS), was synthesized and applied to form a thin cathode layer of composites for a thermal battery that has an unusually high operating temperature of 450 °C. The PIS was prepared through cross-linking of the polyimide with polysiloxane. The morphology of FeS2/PIS composites showed that FeS2 particles was coated with the PIS cross-linked gel. The FeS2/PIS composites enabled to fabricate mechanically stable thin cathode layer that was 10–20% of the thickness of a conventional pellet-type cathode. The FeS2/PIS composites were stable up to 400 °C and maintained their morphology at this temperature. PIS coating layers decomposed at 450 °C, and a new residue was generated, which was observed by transmission electron microscopy, and the compositional change was analyzed. The FeS2/PIS composites showed enhanced thermal stability over that of FeS2 in thermogravimetric analysis. The thermal battery with the PIS polymer binder showed a 20% discharge capacity increase when compared to a conventional pellet-type cathode.

ACS Style

Ilwhan Oh; Jaeyoung Cho; Kwansu Kim; Jaehwan Ko; Haewon Cheong; Young Soo Yoon; Hyun Min Jung. Poly(imide-co-siloxane) as a Thermo-Stable Binder for a Thin Layer Cathode of Thermal Batteries. Energies 2018, 11, 3154 .

AMA Style

Ilwhan Oh, Jaeyoung Cho, Kwansu Kim, Jaehwan Ko, Haewon Cheong, Young Soo Yoon, Hyun Min Jung. Poly(imide-co-siloxane) as a Thermo-Stable Binder for a Thin Layer Cathode of Thermal Batteries. Energies. 2018; 11 (11):3154.

Chicago/Turabian Style

Ilwhan Oh; Jaeyoung Cho; Kwansu Kim; Jaehwan Ko; Haewon Cheong; Young Soo Yoon; Hyun Min Jung. 2018. "Poly(imide-co-siloxane) as a Thermo-Stable Binder for a Thin Layer Cathode of Thermal Batteries." Energies 11, no. 11: 3154.