Carbons and Electrolytes for Advanced Supercapacitors
Carbons and Electrolytes for Advanced Supercapacitors
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DOI：
10.1002/adma.201304137
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发表时间：
2014-04-01
影响因子：
29.4
通讯作者：
Frackowiak, Elzbieta
中科院分区：
文献类型：
--
作者：
Beguin, Francois;Presser, Volker;Frackowiak, Elzbieta
电能存储（EES）是世界上最关键的技术研究领域之一。存储和有效利用间歇性电源产生的电力以及我们的运输车队向电力驱动的过渡从根本上取决于具有高能量和功率密度的EES系统的开发。超级电容器是用于高效能量存储和功率管理的有前途的设备，但与电池相比，它们仍然具有中等的能量密度。为了建立对碳/碳超级电容器的科学和技术的详细理解，本文讨论了双电层（EDL）的基本原理，特别是关于离子尺寸/离子溶剂化与多孔碳电极的孔径之间的相关性。我们总结了合成用于超级电容器的各种碳材料的关键方面。为了提高能量密度，最后两个部分致力于通过引入赝电容材料或通过使用允许增加电池电压的新型电解质来增加电容的策略。特别是，在离子液体的进展，而且在有机电解质领域，进行了讨论和电极质量平衡扩大，因为它的重要性，以创建更高性能的不对称电化学电容器。
Electrical energy storage (EES) is one of the most critical areas of technological research around the world. Storing and efficiently using electricity generated by intermittent sources and the transition of our transportation fleet to electric drive depend fundamentally on the development of EES systems with high energy and power densities. Supercapacitors are promising devices for highly efficient energy storage and power management, yet they still suffer from moderate energy densities compared to batteries. To establish a detailed understanding of the science and technology of carbon/carbon supercapacitors, this review discusses the basic principles of the electrical double-layer (EDL), especially regarding the correlation between ion size/ion solvation and the pore size of porous carbon electrodes. We summarize the key aspects of various carbon materials synthesized for use in supercapacitors. With the objective of improving the energy density, the last two sections are dedicated to strategies to increase the capacitance by either introducing pseudocapacitive materials or by using novel electrolytes that allow to increasing the cell voltage. In particular, advances in ionic liquids, but also in the field of organic electrolytes, are discussed and electrode mass balancing is expanded because of its importance to create higher performance asymmetric electrochemical capacitors.