文献类型：期刊文献

英文题名：Bipolar Ionomer Electrolytes with Desirable Self-Discharge Suppression for Supercapacitors

作者：Wang, Wenqiang[1]; Zeng, Qingyun[1]; Wang, Gengchao[1]; Li, Chunzhong[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：2022

外文期刊名：SSRN

收录：EI(收录号：20220405584)

语种：英文

外文关键词：Curing - Electric discharges - Electric losses - Electrolytic capacitors - Ionomers - Ions - Polyelectrolytes - Solid electrolytes

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 by an in-situ layer-by-layer UV-curing method, which is 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 ultra-high voltage retention of 71% after being left to stand for 100 h after being fully charged. Furthermore, through the quasi-in-situ EDS linear scanning, the characteristics of ion diffusion in this ionomer electrolyte are revealed, suggesting its correlation with self-discharge behavior. ? 2022, The Authors. All rights reserved.