Enhanced Cathode/Electrolyte Interface in Solid-state Li-metal Battery based on Garnet-type Electrolyte

被引：1
作者：
Sun Jiyang [1 ,2 ]
Li Yiqiu [1 ]
Guo Xiangxin [1 ,3 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100039, Peoples R China
[3] Qingdao Univ, Coll Phys, Qingdao 266071, Peoples R China
来源：
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION | 2022年 / 37卷 / 02期
基金：
上海市自然科学基金; 中国国家自然科学基金;
关键词：
solid-state Li-metal battery; composite cathode; interface; ionic conductivity; polyvinylpyrrolidone; LITHIUM-ION; POLYMER ELECTROLYTE; LI0.33LA0.56TIO3; CONDUCTIVITY; TEMPERATURE; PERFORMANCE; ADDITIVES; CATHODES; SURFACE;
D O I：
10.1007/s11595-022-2511-5
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Li/garnet/LiFePO4 solid-state battery was fabricated. The cathode contains LiFePO4, Ketjen black, poly(vinylidene fluoride):LiTFSI polymer as active material, electric conductor and Li-ion conducting binder, respectively. Polyvinylpyrrolidone was added into the cathode to improve cathode/electrolyte interfacial performance. When combined with polyvinylpyrrolidone additive, poly(vinylidene fluoride):polyvinylpyrrol idone:LiTFSI blend forms, and the cathode/electrolyte interfacial resistance reduces from 10.7 k ohm to 3.2 k ohm. The Li/garnet/LiFePO4 solid-state battery shows 80% capacity retention after 100 cycles at 30 degrees C and 0.05 C. This study offers a general strategy to improve cathode/electrolyte interfacial performance and may enable the practical application of solid-state Li-metal batteries.
引用
收藏
页码：149 / 154
页数：6
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