在金属固态电池中调节不兼容接口和电子/离子传输.
Decheng Ding1, Hui Ma2, Xiaomeng Fan3
1College of Electrical Engineering & New Energy, China Three Gorges University, Yichang, Hubei, 443002, China.
Small (Weinheim an der Bergstrasse, Germany)
|May 28, 2025
概括
在LATP固态电解质上的新型Li2O/LixIn接口增强了离子转移,并抑制了树突. 这一突破显著提高了电池的稳定性和性能,为先进的固态电池铺平了道路.
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
- 固态电池 固态电池是什么
背景情况:
- 较大的界面阻抗和较差的离子传输阻碍了基于LATP的固态电池开发.
- 在LATP/Li金属接口的自发反应阻碍了电池的性能和安全.
研究的目的:
- 在LATP上构建一个快速的Li+传输和电子阻断接口.
- 为了增强LATP与金属之间的接口接触.
- 提高基于LATP的固态电池的电化学性能和稳定性.
主要方法:
- 在LATP上In2O3与Li金属的现场电化学反应形成Li2O/LixIn接口.
- /In2O3@LATP/对称电池的制造. /In2O3@LATP/Li对称电池的制造.
- 测试Li/In2O3@LATP/LiFePO4和Li/In2O3@LATP/Li1.2Mn0.6Ni0.2O2充满电池的使用情况.
主要成果:
- 最初的阻力从1211.4降低到106.5 Ω cm-2.
- 将临界电流密度提高到1.9 mA cm-2.
- 在0.2 mA cm-2/0.2 mAh cm-2下,在3700小时内稳定循环,没有树突.
- 充满LiFePO4阴极的电池在600个循环后,每周期的衰变率为≈0.015%.
- 高压兼容 (4.8V) 与 - - 阴极.
结论:
- Li2O/LixIn接口有效地解决了LATP固态电池中的接口问题.
- 这种接口促进了快速的Li+运输,并抑制了Li树突的生长.
- 开发的固态电池具有出色的稳定性,高性能和实际应用的潜力.
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