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液体金属中间层用于超稳定的固态金属电池

Yifan Gu¹, Huachao Tao^2,3, Xuelin Yang²

¹College of Electrical Engineering & New Energy, China Three Gorges University, Yichang, Hubei, 443002, China.

Small (Weinheim an der Bergstrasse, Germany)

|July 17, 2024

概括

液体金属中间层通过改善接口接触并增强阳极和固体电解质之间的结合,有效地抑制固态电池中的树生长. 这一突破显著降低了接口电阻,使稳定的循环运行成为可能,并为实际应用铺平了道路.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
储能储能储能储能储能储能

背景情况:

固态金属电池提供高能量密度和安全性,但受到树的生长和差的接口接触的影响.
金属阳极与Na3Zr2Si2PO12 (NZSP) 等固体电解质之间的接口是电池性能的一个关键瓶.
解决这些接口问题对于实现基于的固态电池的潜力至关重要.

研究的目的:

研究使用液体金属 (GaIn) 介层来缓解固态金属电池的接口问题.
为了增强阳极和Na3Zr2Si2PO12固体电解质之间的接口接触和离子扩散.
为了提高固态电池的循环稳定性和整体性能.

主要方法:

在金属阳极和Na3Zr2Si2PO12固体电解质之间制造液体金属 (GaIn) 的中间层.
电化学表征,包括在各种电流密度和温度下对称细胞循环试验.
对界面特性和在界面上的合金 (Ga4Na,NaIn) 的形成进行分析.
使用修改的接口和NaNi1 / 3Fe1 / 3Mn1 / 3O2阴极组装和测试一个完整的电池.

主要成果:

该GaIn液体金属中间层显著降低了接口电阻,从1095.1 Ω降至21.6 Ω.
对称电池在0.05 mA cm-2下稳定循环超过6500小时,在0.1 mA cm-2下稳定循环3000小时,临界电流密度为0.8 mA cm-2.
由于增强的结合和均的离子流,抑制了树的生长.
全细胞表现出极好的循环性能,在0.5°C的100个循环后保持85.1%的容量.

结论:

液体金属中间层有效地解决了固态金属电池的接口挑战.
Ga-Na和In-Na合金的形成促进了密切的接触,并促进了离子运输.
该战略显示了开发实用和高性能固态电池的巨大潜力.

关键词:

在 GaInIn 中获得.接口工程接口工程液体金属是一种液体金属.这是一个Na/NZSP接口接口.固态金属Na电池的金属电池

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