在基固态电池的实用高活性物质碎片下,丰富阴极的容量限制和离子运输中断
Yue Gong1,2,3, Yu Xia2,4, Hang Zhang4
1Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, Changchun, Jilin 130025, P. R. China.
ACS applied materials & interfaces
|January 24, 2026
概括
富层氧化物 (LLO) 阴极中的空隙空间限制了全固态电池 (ASSB) 中的离子运输. 一种Li3InCl6涂层增强了离子通路,改善了ASSB的性能和能量密度.
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:
- 富含的多层氧化物 (LLO) 阴极为先进电池提供了高的理论容量.
- 使用LLOs在全固态电池 (ASSB) 中实现高能量密度是具有挑战性的,因为空隙限制.
研究的目的:
- 研究粒子内部和粒子间空隙对LLO阴极中的Li+运输的影响.
- 开发一种复合阴极策略,以克服运输限制并提高ASSB的性能.
主要方法:
- 缩小颗粒大小的LLO阴极中空隙形成的特征.
- 设计和实施Li3InCl6涂层,以改善接口接触和Li+导电.
- 在ASSB中对复合性阴极进行电化学测试.
主要成果:
- 由粒子内部和粒子间空隙引起的缓慢Li+运输被确定为主要的性能限制.
- 3InCl6涂层有效地改善了接口接触,并促进了+传导通道.
- 开发的ASSB实现了高容量 (245.2mAh/g在0.1°C) 和卓越的循环稳定性 (250个循环后80.9%的保留率).
结论:
- 空洞工程和复合阴极设计对于高能量密度的LLO基化物ASSB至关重要.
- 3InCl6涂层是一个可行的策略,可以提高ASSB的LLO阴极的电化学性能.
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