Design of Porous Carbons for Supercapacitor Applications for Different Organic Solvent-Electrolytes
Design of Porous Carbons for Supercapacitor Applications for Different Organic Solvent-Electrolytes
复制标题
不同有机溶剂电解液下超级电容器用多孔炭的设计
DOI：
10.3390/c7010015
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发表时间：
2021-03-01
影响因子：
4.1
通讯作者：
Laudone, Giuliano M.
中科院分区：
文献类型：
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作者：
Bates, Joshua;Markoulidis, Foivos;Laudone, Giuliano M.
超级电容器、锂离子电容器和混合电池-超级电容器装置遇到了针对不同电解质优化多孔电极孔径分布的挑战。本研究采用离子传输的体积平均连续介质模型，考虑孔径分布，用于电化学双层电容器（EDLC）的多孔电极的设计。经过对实验数据的验证后，计算机模拟研究了两种类型的多孔电极、活性炭涂层和活性炭织物以及三种电解质：乙腈 (AN) 中的 1.5 M TEABF(4)、碳酸丙烯酯 (PC) 中的 1.5 M TEABF(4) 以及碳酸亚乙酯:碳酸甲乙酯 (EC:EMC) 1:1 v/v 中的 1 M LiPF6。设计工作得出的结论是，多孔电极具有比最大去溶剂化离子大的微孔比表面积，以实现高比容量，并且具有大于最大溶剂化离子的中孔比例，以确保快速离子传输和微孔的可及性，这一点很重要。
The challenge of optimizing the pore size distribution of porous electrodes for different electrolytes is encountered in supercapacitors, lithium-ion capacitors and hybridized battery-supercapacitor devices. A volume-averaged continuum model of ion transport, taking into account the pore size distribution, is employed for the design of porous electrodes for electrochemical double-layer capacitors (EDLCs) in this study. After validation against experimental data, computer simulations investigate two types of porous electrodes, an activated carbon coating and an activated carbon fabric, and three electrolytes: 1.5 M TEABF(4) in acetonitrile (AN), 1.5 M TEABF(4) in propylene carbonate (PC), and 1 M LiPF6 in ethylene carbonate:ethyl methyl carbonate (EC:EMC) 1:1 v/v. The design exercise concluded that it is important that the porous electrode has a large specific area in terms of micropores larger than the largest desolvated ion, to achieve high specific capacity, and a good proportion of mesopores larger than the largest solvated ion to ensure fast ion transport and accessibility of the micropores.