氧化硅基电解液用于稳定水系锌锰电池  

Silica-based electrolyte regulation for stable aqueous zinc-manganese batteries

作　　者：黄菁 彭倩 刘琨 方国赵 HUANG Jing;PENG Qian;LIU Kun;FANG Guo-zhao(School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China;Hunan Key Laboratory of Mineral Materials and Application,Central South University,Changsha 410083,China;School of Materials Science and Engineering,Central South University,Changsha 410083,China;Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province,Central South University,Changsha 410083,China)

机构地区：[1]School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China [2]Hunan Key Laboratory of Mineral Materials and Application,Central South University,Changsha 410083,China [3]School of Materials Science and Engineering,Central South University,Changsha 410083,China [4]Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province,Central South University,Changsha 410083,China

出　　处：《Journal of Central South University》2023年第2期434-442,共9页中南大学学报（英文版）

基　　金：Projects(51774330, 52072411) supported by the National Natural Science Foundation of China;Project(2015) supported by the Teacher Research Foundation of Central South University,China;Project(2022ZZTS0422) supported by the Fundamental Research Funds for the Central Universities,China;Project(2021JJ20060) supported by the Natural Science Foundation of Hunan Province,China;Project(2021RC3001) supported by the Science and Technology Innovation Program of Hunan Province,China。

摘　　要：由于水系电解液的活泼性,水系锌锰电池在低电流密度下稳定性仍然受到挑战。本文报道了一种新型实用的氧化硅基的ZnSO_(4)/MnSO_(4)混合溶液电解质(Si-ZMSO),显著提高了Zn-MnO_(2)电池体系的循环稳定性。Si-ZMSO电解液拓宽了电化学稳定窗口,同时能够抑制锌负极的副反应。因此,锌对称电池表现出了400 h以上的良好循环稳定性。与ZnSO4/MnSO4水系电解液(ZMSO)相比,使用这种新型的混合电解质还可以提高Zn-MnO2电池的循环稳定性能。电池在高负载量和低电流密度下循环200次后仍表现出良好的容量保持率。这种新颖的合成策略有望拓展水系锌锰电池的研究思路和发展。A practical Zn-MnO_(2) battery is still challenged by the deterioration stability under the low current density due to the activeness of water in aqueous electrolyte.Herein,we reported a novel and practical hybrid silica-based ZnSO_(4)/MnSO_(4) mixed solution(Si-ZMSO)electrolyte,which obviously improved the cycle stability of Zn-MnO_(2) battery.The Si-ZMSO electrolyte can widen the ESW of electrolyte and restrain the side reaction of zinc anode,which can achieve a good cyclic stability over 400 h for Zn||Zn symmetrical battery.This novel hybrid electrolyte can also stabilize the cyclic performance of Zn-MnO_(2) batteries compared to ZMSO electrolyte.In particular,it exhibits a good capacity retention after 200 cycles under the high cathode loading and low current density.This novel strategy is expected to advance the development of Zn-MnO2 batteries.

关 键 词：混合电解质 氧化硅纳米纤维 锌负极 循环稳定性 Zn-MnO_(2)电池 

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]