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溶解调制增强阳离子衍生的固体电解质间相,用于水性金属电池的深度循环

Dongdong Wang¹, Dan Lv¹, Huili Peng¹

¹Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, 250100, Jinan, P. R. China.

Angewandte Chemie (International ed. in English)

|July 31, 2023

概括

六甲基三胺 (HMPA) 通过形成保护性固体电解质介相而稳定阳极,而不会被消耗. 这一突破使电池的长期循环和高容量成为可能.

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:

阳极面临着树突生长和副作用的挑战,限制了电池的稳定性.
当前的电解质添加剂在循环过程中经常被消耗,从而降低了长期的性能.
开发稳定的阳极对于先进的电池技术至关重要.

研究的目的:

引入六甲基三胺 (HMPA) 作为稳定的阳极的新型电解质添加剂.
研究HMPA增强阳极循环稳定的机制.
为了评估阳极与HMPA在对称和全细胞中的性能.

主要方法:

用HMPA对对称细胞进行电化学测试.
使用HMPA修饰的电解质制造和测试ZngadgadgadV2O5全细胞.
分析溶解结构和现场固体电解质相间形成.
对利用效率和循环稳定性的评估.

主要成果:

HMPA重塑溶解结构并促进离子分解,形成一种富含无机物的固体电解质介相 (SEI).
该SEI形成机制不会消耗HMPA,确保其持续的有效性.
对称细胞表现出长时间的稳定性 (在10 mA cm-2下约500小时).
在充满电池的条件下,在充满挑战的条件下实现了高累积容量,例如瘦电解质和有限的供应.

结论:

HMPA是一种有效的电解质添加剂,通过促进自我保存的SEI来稳定阳极.
HMPA的非消耗性质确保了基电池的长期稳定性和高性能.
这项工作为开发高性能和耐用电池提供了一个有前途的战略.

关键词:

水性电池的使用方法固体电解质间相固体电解质间相电池电池的使用方法 Zn 阳极 Zn 阳极在

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