材料科学
无定形固体
离子电导率
电解质
锂(药物)
硫化物
电池(电)
离子键合
快离子导体
化学工程
阴极
多硫化物
复合材料
离子
冶金
电极
热力学
物理化学
有机化学
内分泌学
功率(物理)
化学
工程类
物理
医学
作者
Wentong Fan,Miao Jiang,Gaozhan Liu,Wei Weng,Jing Yang,Xiayin Yao
标识
DOI:10.1021/acsami.2c03563
摘要
All-solid-state lithium/sulfide batteries are considered as next-generation high-energy-density batteries with unrivaled safety. However, sulfide cathodes generally suffer from insulating properties and huge volume expansion in all-solid-state lithium batteries. Based on amorphous TiS4 (a-TiS4), a certain proportion of Super P is introduced to suppress the volume expansion and increase the electronic conductivity. Meanwhile, a Li7P3S11 solid electrolyte is in situ coated on the surface of 20% Super P/a-TiS4, and the close interfacial contact between the active material and the solid electrolyte constructs a favorable ionic conduction path. As a result, a Li/75% Li2S-24% P2S5-1% P2O5/Li10GeP2S12/20% Super P/a-TiS4@Li7P3S11 battery shows a high reversible capacity of 507.4 mAh g-1 after 100 cycles at 0.1 A g-1. Even the current density increases to 1.0 A g-1, and it can also provide a reversible capacity of 349.8 mAh g-1 after 200 cycles. These results demonstrate a promising 20% Super P/a-TiS4@Li7P3S11 cathode material with electronic/ionic conduction networks for all-solid-state lithium batteries.
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