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为耐用水性-电池重建界面沉积

Yida Hu¹, Zhexuan Liu¹, Lanyan Li²

¹School of Materials Science and Engineering, Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province, Central South University, Changsha 410083, China.

National science review

|September 11, 2023

概括

一种新型的准性电解质 (QEE) 通过稳定界面反应来增强水性-电池 (ZMB). 这使得ZMB的循环稳定性得到改善,能量密度保持率增加了174%.

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:

水性-电池 (ZMB) 提供低成本和高安全性,但遭受复杂的界面反应.
阴极的固体-液体接口严重影响ZMB中的溶解/沉积和离子运输.

研究的目的:

开发一种准性电解质 (QEE),用于稳定基阴极的界面沉积和反应动力学.
优化质量和电荷转移,以提高水性ZMB中的循环性能.

主要方法:

理论分析以了解界面能量障碍和反应动力学.
石英晶体微平衡与散射监测 (QCM-D) 和深度蚀刻X射线光电子光谱 (DXPS) 用于界面特性.
在各种循环条件下用QEE对ZMB进行电化学测试.

主要成果:

QEE稳定了可逆界面沉积和改善了反应动力学,证明初始能量障碍不如循环诱导的动力学那么重要.
带有 QEE 的 ZMB 在 350 个循环后在 0.5 A g-1 时实现了 250 mAh g-1 的稳定特定容量.
与传统电解质相比,能量密度保留增加了174%,软包电池显示出商业潜力.

结论:

通过界面沉积优化界面反应动力学是水性ZMB中稳定循环的关键.
开发的淡水QEE是稳定和高性能水性ZMB的可行策略.
这种方法显示了商业化ZMB技术的巨大潜力.

关键词:

这是一种准-eutectic 电解质.水性 - 电池的电池.转移费用转移费用转移费用转移费用质量转移是指质量转移.固体-液体界面状态的界面状态.

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