文献类型：期刊文献

中文题名：Bipolar ionomer electrolytes with desirable self-discharge suppression for supercapacitors

作者：Wenqiang Wang[1];Qingyun Zeng[1];Ruoyu Wang[1];Gengchao Wang[1];Chunzhong Li[2]

机构：[1]Shanghai Engineering Research Center of Hierarchical Nanomaterials,Shanghai Key Laboratory of Advanced Polymeric Materials,School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China;[2]Shanghai Engineering Research Center of Hierarchical Nanomaterials,School of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China

年份：2023

期号：3

起止页码：422

中文期刊名：Journal of Energy Chemistry

外文期刊名：能源化学（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2023_2024】；

基金：financial supports of National Natural Science Foundation of China(21875065,51673064,22109045);the China Postdoctoral Science Foundation Special Fund(2022T150211);the China Postdoctoral Science Foundation(2021M701191)。

语种：英文

中文关键词：Bipolar membrane;Ionomer electrolyte;Supercapacitors;Self-discharge

摘要：Supercapacitors based on electric double layers are prone to serious self-discharge due to electrolyte ion desorption and the resulting energy loss severely limits the application range of supercapacitors.Rational design of polymer electrolyte systems to address this problem shows considerable generality and high feasibility.Herein,we reported a quasi-solid-state bipolar ionomer electrolyte prepared by an in-situ layer-by-layer ultraviolet-curing method,which has an integrated Janus structure with an intermediate binding layer.Based on the synergistic effect of confining impurity ions by ionizable groups and electrostatic repulsion to stabilize the electric double layers and superimposing synergies on both sides,the assembled device not only possesses ideal supercapacitor characteristics,but also exhibits an ultrahigh voltage retention of 71% after being left to stand for 100 h after being fully charged.Furthermore,through the quasi-in-situ energy dispersive X-ray spectroscopy linear scanning,the characteristics of ion diffusion in this ionomer electrolyte are revealed,suggesting its correlation with self-discharge behavior.