Kubicka Marcelina, Bakierska Monika, Chudzik Krystian, Rutkowska Małgorzata, Pacek Joanna, Molenda Marcin
Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland.
Polymers (Basel). 2019 Sep 19;11(9):1527. doi: 10.3390/polym11091527.
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 N-adsorption/desorption (N-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).
分析了热解温度对由马铃薯、玉米和大米淀粉制备的碳气凝胶的结构、织构和电化学性能的影响。有机前驱体的碳化过程，随后是糊化、溶剂交换和干燥过程，在氩气气氛中于600℃至1600℃的温度范围内进行。通过X射线粉末衍射（XRD）以及N吸附/脱附（N-BET）方法对纳米结构碳进行了表征。使用恒电流充放电测试（GCDT）和电化学阻抗谱（EIS）研究了基于所制备碳阳极的锂离子电池的电化学行为。结果表明，热处理阶段对气凝胶材料多孔结构的正确形成及其作为阳极材料的工作参数具有至关重要的影响。在700℃热解的样品获得了最高的外表面积相对发展率，其表现出最佳的电化学特性（最高的比容量以及最低的电荷转移电阻）。
