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In this work, we investigated the influence of gum arabic (GA) as a structuring additive, on the electrochemical behavior of bio-derived carbon aerogels (CAGs). Modified carbonaceous materials were prepared by the gelatinization process of potato starch (PS) with the addition of GA in various quantities, followed by the thermal treatment of the obtained gels in an inert gas atmosphere. The obtained anode materials were examined by X-ray diffraction (XRD), elemental analysis (EA), galvanostatic charge/discharge tests (GCDT), extensive cycling (LT-GCDT) and cyclic voltammetry (CV) methods. The highest electrochemical performance was achieved for carbon aerogel material, in which 1% w/w GA was added. The results showed that the proper composition of carbon precursor with a structuring promoter improves the rheological properties of starch gel and stabilizes the final aerogel structure affecting CAG functional properties.
Marcelina Kubicka; Monika Bakierska; Krystian Chudzik; Marcin Molenda. A Strategy to Optimize the Performance of Bio-Derived Carbon Aerogels by a Structuring Additive. Nanomaterials 2020, 10, 1811 .
AMA StyleMarcelina Kubicka, Monika Bakierska, Krystian Chudzik, Marcin Molenda. A Strategy to Optimize the Performance of Bio-Derived Carbon Aerogels by a Structuring Additive. Nanomaterials. 2020; 10 (9):1811.
Chicago/Turabian StyleMarcelina Kubicka; Monika Bakierska; Krystian Chudzik; Marcin Molenda. 2020. "A Strategy to Optimize the Performance of Bio-Derived Carbon Aerogels by a Structuring Additive." Nanomaterials 10, no. 9: 1811.
The application of modified spinel materials in commercial systems relates to the verification of their parameters under different conditions. Hence, in this study, the influence of temperature on the electrochemical behavior of sulfur-doped spinel (LiMn2O3.97S0.03), with reference to stoichiometric spinel (LiMn2O4), was investigated. The electrochemical characteristics of Li-ion cells based on the fabricated spinels were investigated using galvanostatic charge–discharge tests (GCDT), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). The results show that introducing sulfur into the spinel structure improves the electrochemical properties at each of the studied temperatures (3, 22 and 61 °C). LiMn2O3.97S0.03 exhibits higher specific capacities, enhanced diffusivity and charge–discharge rates (particularly at low temperatures), and much better cycling stability, regardless of the testing conditions. Our research proves that an S-doping system is a better alternative to LiMn2O4 in the context of working parameters, while maintaining environmental friendliness and low manufacturing costs.
Marcelina Kubicka; Monika Bakierska; Michał Świętosławski; Krystian Chudzik; Marcin Molenda. The Temperature Effect on the Electrochemical Performance of Sulfur-Doped LiMn2O4 in Li-Ion Cells. Nanomaterials 2019, 9, 1722 .
AMA StyleMarcelina Kubicka, Monika Bakierska, Michał Świętosławski, Krystian Chudzik, Marcin Molenda. The Temperature Effect on the Electrochemical Performance of Sulfur-Doped LiMn2O4 in Li-Ion Cells. Nanomaterials. 2019; 9 (12):1722.
Chicago/Turabian StyleMarcelina Kubicka; Monika Bakierska; Michał Świętosławski; Krystian Chudzik; Marcin Molenda. 2019. "The Temperature Effect on the Electrochemical Performance of Sulfur-Doped LiMn2O4 in Li-Ion Cells." Nanomaterials 9, no. 12: 1722.
The influence of the pyrolysis temperature on the structural, textural, and electrochemical properties of carbon aerogels obtained from potato, maize, and rice starches was analyzed. The carbonization of organic precursors, followed by gelatinization, exchange of solvent, and drying process, was carried out in an argon atmosphere at temperatures ranging from 600 °C to 1600 °C. The nanostructured carbons were characterized by X-ray powder diffraction (XRD) as well as N2-adsorption/desorption (N2-BET) methods. The electrochemical behavior of Li-ion cells based on the fabricated carbon anodes was investigated using the galvanostatic charge/discharge tests (GCDT) and electrochemical impedance spectroscopy (EIS). The results show that the thermal treatment stage has a crucial impact on the proper formation of the aerogel material's porous structures and also on their working parameters as anode materials. The highest relative development of the external surface was obtained for the samples pyrolysed at 700 °C, which exhibited the best electrochemical characteristics (the highest specific capacities as well as the lowest charge transfer resistances).
Marcelina Kubicka; Monika Bakierska; Krystian Chudzik; Małgorzata Rutkowska; Joanna Pacek; Marcin Molenda. Electrochemical Properties and Structure Evolution of Starch-Based Carbon Nanomaterials as Li-Ion Anodes with Regard to Thermal Treatment. Polymers 2019, 11, 1527 .
AMA StyleMarcelina Kubicka, Monika Bakierska, Krystian Chudzik, Małgorzata Rutkowska, Joanna Pacek, Marcin Molenda. Electrochemical Properties and Structure Evolution of Starch-Based Carbon Nanomaterials as Li-Ion Anodes with Regard to Thermal Treatment. Polymers. 2019; 11 (9):1527.
Chicago/Turabian StyleMarcelina Kubicka; Monika Bakierska; Krystian Chudzik; Małgorzata Rutkowska; Joanna Pacek; Marcin Molenda. 2019. "Electrochemical Properties and Structure Evolution of Starch-Based Carbon Nanomaterials as Li-Ion Anodes with Regard to Thermal Treatment." Polymers 11, no. 9: 1527.