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在现场建造一个静态动态混合接口,用于水性Zn离子电池的稳定Zn阳极

Baohua Liu¹, Luyan Yu¹, Qinghua Xiao¹

¹School of Chemistry and Materials Science, Jiangsu Normal University Xuzhou Jiangsu 221116 P. R. China wangc@jsnu.edu.cn wangqh@jsnu.edu.cn.

Chemical science

|September 18, 2024

概括

三甲胺添加剂在阳极上形成了一层保护性混合层,通过防止树突的生长和副作用,显著改善水性离子电池的稳定性和性能.

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:

水性离子电池 (AZIB) 提供安全,低成本和环保的能源存储.
阳极在AZIB中遭受了树突形成和副作用,限制了循环寿命.
开发稳定的阳极对于实际的AZIB应用至关重要.

研究的目的:

为了提高阳极在水性电解质中的循环稳定性.
为了抑制树的生长和阳极上的不良副作用.
为了提高AZIB的整体性能和寿命.

主要方法:

使用triethanolamine作为电解质添加剂形成混合固体电解质介相 (SEI) 层.
描述SEI的静态 (ZnSO₄·3Zn(OH) ₂·4H₂O) 和动态 (四级离子吸附) 组成部分.
评估AZIBs中改性阳极的电化学性能.

主要成果:

混合SEI层有效地抑制了Zn阳极腐蚀和的演变.
沿着 (002) 方向实现了均的沉积,促进了均的涂层.
经过修改的阳极在1.0 mA cm-2下表现出2500小时的延长周期寿命,并具有98.94%的库伦比效率.
Zn‖V₂O₅细胞在500个循环后表现出178.4mAhg-1的容量.

结论:

三甲胺是一种有效的添加剂,用于在阳极上构建强大的混合SEI.
开发的SEI层显著提高了AZIBs的循环稳定性和协同效率.
这一战略为高性能水性离子电池的实际应用提供了一个有希望的途径.

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