Asymmetric Electrolytes Design for Aqueous Multivalent Metal Ion Batteries  

作　　者：Xiaochen Yang Xinyu Wang Yue Xiang Longtao Ma Wei Huang 

机构地区：[1]Frontiers Science Center for Flexible Electronics,Institute of Flexible Electronics,Northwestern Polytechnical University,Xi’an 710072,People’s Republic of China [2]School of Materials Science and Engineering,Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials,South China University of Technology,Guangzhou 510641,People’s Republic of China

出　　处：《Nano-Micro Letters》2024年第3期227-253,共27页纳微快报（英文版）

基　　金：National Natural Science Foundation of China(52202299);the Analytical&Testing Center of Northwestern Polytechnical University(2022T006).

摘　　要：With the rapid development of portable electronics and electric road vehicles,high-energy-density batteries have been becoming front-burner issues.Traditionally,homogeneous electrolyte cannot simultaneously meet diametrically opposed demands of high-potential cathode and low-potential anode,which are essential for high-voltage batteries.Meanwhile,homogeneous electrolyte is difficult to achieve bi-or multi-functions to meet different requirements of electrodes.In comparison,the asymmetric electrolyte with bi-or multi-layer disparate components can satisfy distinct requirements by playing different roles of each electrolyte layer and meanwhile compensates weakness of individual electrolyte.Consequently,the asymmetric electrolyte can not only suppress by-product sedimentation and continuous electrolyte decomposition at the anode while preserving active substances at the cathode for high-voltage batteries with long cyclic lifespan.In this review,we comprehensively divide asymmetric electrolytes into three categories:decoupled liquid-state electrolytes,bi-phase solid/liquid electrolytes and decoupled asymmetric solid-state electrolytes.The design principles,reaction mechanism and mutual compatibility are also studied,respectively.Finally,we provide a comprehensive vision for the simplification of structure to reduce costs and increase device energy density,and the optimization of solvation structure at anolyte/catholyte interface to realize fast ion transport kinetics.

关 键 词：Asymmetric electrolyte Aqueous multivalent metal ion batteries Electrochemical stability windows Electrolyte interface 

分 类 号：TM912[电气工程—电力电子与电力传动] O646.1[理学—物理化学]