一个核心外结构的阿吉罗狄特类型电解质,使化学/电化学稳定性提高
Shijie Lu1, Yuxiang Zhang1, Haijian Lv1
1School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 10081, P.R. China.
Angewandte Chemie (International ed. in English)
|May 9, 2025
概括
这项研究开发了一种新的核心硫化物固体电解质,为全固态电池增强了化学和电化学稳定性. 该工程材料通过氧化阴极实现了高离子导电性和出色的循环性能.
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
- 固态化学 固态化学
背景情况:
- 硫化物固体电解质为所有固态电池提供高离子导电性.
- 化学和电化学稳定性不佳限制了它们的大规模应用.
研究的目的:
- 开发一种稳定且高导电性的硫化物固体电解质.
- 为了提高全固态电池的电化学性能.
主要方法:
- 制造一个核心外固体电解质与Cl梯度的 argyrodite核心和LiCl外.
- 固体电解质的表面工程.
- 使用LiCoO2阴极和Li金属阳极进行电化学测试.
主要成果:
- 达到10.62mS cm-1.1的高离子导电性.
- 在暴露在空气中的情况下,证明了显著的化学稳定性.
- 具有优异的电化学稳定性 (0-5V与Li/Li+相比) 和与Li金属的良好兼容性.
- LiCoO2//固体电解质//Li电池显示95.6%的容量保留超过500个周期在1C.
结论:
- 核心外结构有效地提高了化学和电化学稳定性.
- 表面工程协同改善Li+运输和离子导电性.
- 开发的固体电解质显示出高性能全固态电池的巨大潜力.
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