电化学（中英文）2024，Vol.30Issue(11)：30-39,10.DOI:10.61558/2993-074X.3481
电解质杂化效应衍生的高性能水系超级电容器
Aqueous Supercapacitors With Wide Operative Voltage Window and Long Cycling Life Enabled by Electrolyte Hybridization Effect
摘要
Abstract
Developing supercapacitors(SCs)with long cycling life and wide operative voltage window is a significant topic in the field of aqueous electrolytes.Although the design of water in salt(WIS)electrolytes has pushed the development of aqueous electrolytes to a new height,the WIS electrolytes with an operative voltage window of up to 2.5 V is still very scarce.Herein,in order to enrich the type of aqueous electrolyte with high operative voltage,tetramethy-lammonium trifluoromethanesulfonate(TMAOTf)based WIS electrolyte was used as a model to construct WIS based hybrid electrolyte with acetonitrile(ACN)co-solvent and LiTFSI co-solute.In view of the coordination effect of ACN and Li+on free water in TMAOTf based WIS electrolyte,the TMA+-Li+-AWIS electrolyte has the electrochemical stabilization window of up to 3.35 V.Further coupled with the commercial YP-50F electrodes,TMA+-Li+-AWIS based SCs exhibited wide operative voltage window(2.5 V),long cycling life(45,000 cycles)and good low-temperature performance(99.99％capacitance retention after 2000 cycles at-20 ℃).The design of this hybrid electrolyte will enrich the types of aqueous hybrid electrolytes with long cycling life and wide operative voltage window.关键词
超级电容器/水系杂化电解质/盐包水电解质/宽电压窗口/长循环寿命Key words
Supercapacitor/Aqueous hybrid electrolyte/Tetramethylammonium trifluoromethanesulfonate based water in salt electrolyte/Operative voltage window/Cycling life引用本文复制引用
马世花,尹起,赵金平..电解质杂化效应衍生的高性能水系超级电容器[J].电化学（中英文）,2024,30(11):30-39,10.基金项目
This work was supported by the Longkou City Science and Technology Research and Develop-ment Plan(No.2020KJJH061). （No.2020KJJH061）
