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协同电离子溶解重组和化介相为高可逆性和金属阳极的利用

Wuhai Yang^1,2, Gang Wu^1,2, Ruijie Zhu³

¹Research Institute for Energy Conservation, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Umezono, Tsukuba 305-8568, Japan.

|December 6, 2023

概括

这项研究引入了 (Zn) 电池的新型电解质,提高了 Zn 阳极的稳定性和性能. 新的基于GBL的电解质显著提高了Zn电池的寿命和大规模应用的效率.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
储能储能储能储能储能储能

背景情况:

(Zn) 电池由于安全性,成本和环境效益,对大规模储能充满希望.
挑战包括低的可逆性和水相关的被动化和腐蚀引起的不均的电沉积.
现有的电解质努力缓解这些问题,阻碍了实际应用.

研究的目的:

开发一种多功能电解质,以应对Zn阳极在水环境中的不稳定性.
为了提高 Zn 的可逆性和电沉积,以提高电池性能和寿命.
调查电解质组成在 Zn 阳极上形成保护性介相中的作用.

主要方法:

一种新型的电解质是使用-丁烯酸 (GBL) 和二三甲硫) 胺 (Zn(BF4) 2·xH2O) 制成的.
评估了电化学性能,包括库伦比克效率,面积容量和利用率.
核磁共振 (NMR) 光谱被用来分析相间形成和电解质结构.
评估了VO2/Zn电池和袋式电池的长期循环稳定性.

主要成果:

基于GBL的电解质有效地降低了Zn阳极与水的反应性.
在 Zn 阳极表面上构建了一个防护的化介相.
实现了高Zn可逆性 (99.74%的库伦比克效率),高面积容量 (55 mAh/cm2) 和高Zn利用率 (91%).
证明了卓越的循环稳定性,VO2/Zn电池的循环超过5000次,袋式电池在400次循环后保持了77.3%的容量.

结论:

基于GBL的多功能电解质成功克服了Zn电池阳极的内在挑战.
GBL溶解和相间形成的协同效应导致了优越的电化学性能和稳定性.
这一进步为实用,高性能和持久的电池铺平了道路,用于大规模储能.

关键词:

在 Zn 离子溶解重组过程中.金属电池金属电池化物相间阶段的化物高利用率的高利用率.具有高面积容量的地区.

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