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构建水的内海尔姆霍尔茨平面稳定了阳极长寿的固体电解质间相

Zehua Zhao¹, Huandi Zhang¹, Xiaowei Shi¹

¹State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, No.28, Xianning West Road, Xi'an, Shaanxi, 710049, P. R. China.

Small (Weinheim an der Bergstrasse, Germany)

|September 18, 2025

概括

研究人员通过使用贝他因和二乙烯糖醇修改电气双层 (EDL) 结构,提高了水性离子电池 (AZIB) 的阳极稳定性. 这种方法抑制了寄生虫反应和树突生长,从而延长了循环寿命.

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
表面化学表面化学

背景情况:

阳极的稳定性对于水性离子电池 (AZIB) 来说至关重要.
在 Zn 阳极-电解质接口的电双层 (EDL) 结构显著影响稳定性.
定制EDL是一种有前途的策略,可以提高 Zn 阳极的性能.

研究的目的:

实验实现EDL结构的水薄内赫尔姆霍尔茨平面 (IHP).
为了提高AZIB中Zn阳极的稳定性和寿命.
为了抑制Zn阳极上的寄生反应和树生长.

主要方法:

在 ZnSO4 电解质中添加贝他因 (Bet) 和二乙烯糖醇 (DEG).
在 Zn 表面上对 DEG/Bet 进行优先吸附,形成无水质的 IHP.
在DEG/Bet的现场分解形成混合固体电解质间相 (SEI).

主要成果:

一个EDL的水IHP成功建造.
寄生反应被抑制,树的生长受到阻碍.
阳极在1 mA cm−2和1 mAh cm−2.2时实现了超过1700个循环,具有99.8%的库伦比效率.
对称细胞在10 mA cm-2和50%的放电深度下进行了超过280小时的循环.

结论:

贝他因和二乙烯甘醇有效地修改EDL结构,以提高Zn阳极稳定性.
混合SEI层的形成对于抑制树突的生长至关重要.
这一策略为在AZIB中开发持久的Zn阳极提供了可行的途径.

关键词:

水性离子电池水性离子电池气演化反应反应的反应内海尔姆霍尔茨平面内海尔姆霍尔茨平面固体电解质接口的接口是固体电解质.阳极是一种阳极.

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