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超薄的友性间相调节电双层,使水性离子电池具有高度稳定性

Yimei Chen¹, Zhiping Deng¹, Yongxiang Sun¹

¹Department of Chemical and Materials Engineering, University of Alberta, 9211-116 Street NW, Edmonton, AB, T6G 1H9, Canada.

Nano-micro letters

|January 25, 2024

概括

一层超薄的硫化 (ZnS) 层通过调节电气双层来稳定水性离子电池中的阳极,防止树突的生长,并使长期循环. 这一进步对于电网规模的储能至关重要.

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) 对电网规模的储能充满希望,但面临的挑战是阳极的不稳定性,包括树突的形成和副作用.
控制电极/电解质接口,特别是电气双层,是提高AZIB性能的一个关键策略.

研究的目的:

调查超薄型硫化 (ZnS) 层在调节阳极的电双层中的有效性.
为了改善AZIB的稳定性和循环性能,用于实际应用.

主要方法:

用超薄的 ZnS 保护层制造一个 Zn@ZnS 电极.
电化学表征包括潜在掉落测量,电双层电容和对称细胞循环.
使用不同阴极 (I2/AC和MnO2) 的AZIB组装和测试.

主要成果:

S层有效调节了电荷分布,并减少了电极/电解质接口上的电双层排斥力.
增强的电双层电容表明吸附点增加.
带有 ZnS 保护的对称 Zn//Zn 细胞在 1 mA cm−2 时实现了 ~ 3,000 小时的稳定循环,并具有较低的超电位 (25 mV).
使用I2/AC阴极的AZIB显示出高速率性能 (160mAhg-1在0.1Ag-1时) 和出色的循环稳定性 (>10,000个循环在10Ag-1时).
在0.5A g-1下经过1200个循环后,ZnBodyMnO2电池表现出持续的容量 (130 mAh g-1).

结论:

超薄的ZnS层作为电气双层的有效调节器,显著提高了AZIB中阳极的稳定性.
这种接口工程方法为开发用于电网规模应用的高性能和持久的水性离子电池提供了可行的途径.

关键词:

电气双层调节器电气双层调节器抑制的副作用和树枝状.多功能SEI层是一个多功能SEI层.快速运动的动力学阳极是一种阳极.

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