Nowadays,lithium-ion capacitors(LICs)have become a type of important electrochemical energy storage devices due to their high power and long cycle life char-acteristics with fast response time.As one of the essential components of LICs,the electrolytes not only provide the anions and cations required during charge and discharge processes,but also supply the liquid environment for ions to migrate between anodes and cathodes in LIC cells.It is well accepted that propylene carbonate(PC)cannot be used as a single solvent for Li-ion electrolyte due to the failure to form stable SEI film on graphite surface.In this work,the compatibility of PC-based electrolyte with commercial soft carbon anode and activated carbon cath-ode has been validated by using the laminated pouch LIC cells.The effects of additives on the electrochemical properties of PC-based LICs have been systematically investigated.Ethylene sulfite(ES)was proved to be an effective additive to promote capacity retention at high C-rate,which is superior to vinylene carbonate and fluo-roethylene carbonate.The addition of 5 wt％ES plays an important role in reducing internal resistance,as well as improving electrochemical stability and low-temperature performances.This study is expected to be beneficial to explore robust electrolyte/additive combinations for LICs to reduce the internal resistance and to improve the low-temperature performances.

Peng-Lei Wang;Xian-Zhong Sun;Ya-Bin An;Xiong Zhang;Chang-Zhou Yuan;Shuang-Hao Zheng;Kai Wang;Yan-Wei Ma

Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;Institute of Electrical Engineering and Advanced Electromagnetic Drive Technology,Qilu Zhongke,Jinan 250013,China ;School of Materials Science&Engineering,University of Jinan,Jinan 250022,China;State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China;Dalian National Laboratory for Clean Energy,Chinese Academy of Sciences,Dalian 116023,China

稀有金属（英文版）

[1]Peng-Lei Wang;Xian-Zhong Sun;Ya-Bin An;Xiong Zhang;Chang-Zhou Yuan;Shuang-Hao Zheng;Kai Wang;Yan-Wei Ma-.Additives to propylene carbonate-based electrolytes for lithium-ion capacitors)[J].稀有金属（英文版）,2022(04):1304-1313

vinylene,roethylene

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