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硫化物全固态电池具有超高层氧化物阴极和容量

Guoshun Liu^1,2, Ning Cao¹, Leiying Zeng³

¹School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580, China.

Small (Weinheim an der Bergstrasse, Germany)

|May 5, 2025

概括

混合涂层增强硫化物全固态电池 (SASSB) 的富含的阴极,提高性能和稳定性. 这一进步为高能量密度电池应用提供了一条有希望的道路.

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:

富含的分层氧化物阴极对于高性能硫化物全固态电池 (SASSB) 是至关重要的.
诸如空间电荷层,元素扩散和不良接触等接口问题通过增加阻抗来阻碍SASSB性能.

研究的目的:

为了解决SASSB中的接口阻抗,使用富含的分层氧化物阴极.
为了提高电极表面的离子导电性,Li+迁移和机械稳定性.

主要方法:

氧化 (LPO) 和氧化 (LBO) 的混合涂层被设计用于95% (Ni) 含量的NCM阴极.
基于SC-NCM92@LPO+LBO和SC-NCM95@LPO+LBO的SASSB的制造和测试,使用Li6PS5Cl固体电解质和Li-In合金阳极.

主要成果:

混合涂层提高了离子导电性和Li+迁移效率.
SC-NCM92@LPO+LBO SASSBs实现了220.5mAhg-1的特定放电容量,具有良好的高速率性能.
SC-NCM95@LPO+LBO SASSBs表现出高特异容量253.3 mAh g-1,优异的高速率能力 (137.9 mAh g-1在10C),以及卓越的循环稳定性.

结论:

LPO+LBO混合涂层有效地减轻了接口阻抗,并提高了SASSB中的电化学性能.
该战略为SASSB中应用超高层氧化物阴极提供了宝贵的参考,为先进的储能解决方案铺平了道路.

关键词:

所有固态电池都是固态电池.混合涂层是一种混合涂层.一个单晶阴极.硫化物是固体电解质的电解质.超高层氧化物阴极是超高层氧化物阴极.

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