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

黄菁 ¹彭倩 ¹刘琨 ²方国赵³

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作者信息

1. School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China
2. 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
3. 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
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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ZnSO4/MnSO4混合溶液电解质(Si-ZMSO),显著提高了Zn-MnO2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.

Abstract

A practical Zn-MnO2 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 ZnSO4/MnSO4 mixed solution (Si-ZMSO) electrolyte, which obviously improved the cycle stability of Zn-MnO2 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-MnO2 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-MnO2电池

Key words

hybrid electrolyte/SiOx nanofibers/Zn anode/cyclic stability/Zn-MnO2 battery

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基金项目

National Natural Science Foundation of China(51774330)

National Natural Science Foundation of China(52072411)

Teacher Research Foundation of Central South University,China(2015)()

Fundamental Research Funds for the Central Universities,China(2022ZZTS0422)

Natural Science Foundation of Hunan Province,China(2021JJ20060)

Science and Technology Innovation Program of Hunan Province,China(2021RC3001)

出版年

2023

中南大学学报(英文版)

中南大学

中南大学学报(英文版)

CSTPCDCSCD北大核心EI

影响因子：0.47

ISSN：2095-2899

参考文献量3

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