再生固体接口增强高性能全固态电池的性能
Zhaoxin Yu1, Yaobin Xu2, Michael Kindle1
1Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States.
ACS nano
|April 24, 2024
概括
研究人员使用纳米尺寸化开发了一种再生固体接口,以稳定所有固态电池中的金属阳极. 这一突破提高了电池的性能和寿命,使其能够稳定运行超过1000小时.
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:
- 全固态电池 (ASSLB) 面临阳极界面不稳定的挑战.
- 在涂/剥离过程中的动态变化会导致性能降低.
研究的目的:
- 为ASSLBs创建一个导电和再生固体接口.
- 为了增强阳极的稳定性和提高整体细胞性能.
主要方法:
- 在固态电解质中在现场生成纳米尺寸化 (纳米-LiI).
- 在涂层和剥离过程中利用纳米-LiI的可逆扩散.
- 直接使用金属作为阳极.
主要成果:
- 在高电流密度和高温下,金属阳极在1000多小时内实现了稳定的运行.
- 已证明完全固态硫电池的稳定循环超过250个循环.
- 在阳极和固态电解质之间改善粘附性和Li+运输.
结论:
- 再生型纳米-LiI接口有效地解决了ASSLBs中坚实的接口挑战.
- 这种方法促进了统一的涂/剥离,并提高了电池的寿命.
- 为高性能ASSLB设计先进接口提供了洞察力.
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