超级电容器
电解质
水溶液
化学
化学工程
材料科学
电化学
有机化学
物理化学
电极
工程类
作者
Wee Sun Lee,Ting Xiong,Guan Chee Loh,Teck Leong Tan,Junmin Xue
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2018-06-28
卷期号:1 (7): 3070-3076
被引量:19
标识
DOI:10.1021/acsaem.8b00751
摘要
Achieving a wide potential window of aqueous supercapacitor has been one of the key research interests to address its poor energy density. However, in this process, water decomposition becomes an increasingly significant issue that has to be tackled in order to attain a reliable aqueous supercapacitor. In order to avoid possible water decomposition at a wide potential, benign interaction between electrolyte and electrode during the cell operation has to be considered. In this work, a water-in-bisalt electrolyte consisting of 21 M lithium bis(trifluoromethane)sulfonamide and 1 M lithium sulfate was proposed. To complement the electrolyte, Li+ inserted MnO2 and carbon were selected as electrode materials due to their low oxygen evolution reaction/hydrogen evolution reaction activities. The resultant aqueous supercapacitor was able to operate at 2.8 V which, to the best of our knowledge, is one of the widest potential windows reported for an aqueous supercapacitor system. The cell was able to deliver an ener...
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