Modification of Cathode/Electrolyte Interface in Solid State Lithium Battery by PEO

被引：0
作者：
Chen Linhui [1 ]
Wang Chang'an [1 ]
机构：
[1] Tsinghua Univ, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2020年 / 49卷 / 02期
关键词：
solid state battery; garnet electrolyte; PEO buffer layer; cathode/electrolyte interface resistance; TEMPERATURE; ELECTROLYTE; ANODE;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
PEO buffer layer was introduced to the cathode/electrolyte interface to improve contact. First, Li6.4La3Zr1.4Ta0.6O12 (LLZTO) with a density of 5.25 g.cm(-3) and an ionic conductivity of 8.33x10(-4) S.cm(-1) was prepared. Then PEO-LiTFSI-LLZTO buffer layer and LiFePO4 composite cathode slurry were prepared. The PEO buffer layer and cathode slurry were coated on the surface of electrolyte by a spin coating method. The results show that the interfacial contact is improved under applied pressure at 60 degrees C, and the resulting interfacial resistance is 509 Omega.cm(2). The galvanostatic charge and discharge curve of symmetric battery proves excellent interfacial stability. The solid-state battery has the fist discharge capacity of 145.8 mAh.g(-1) and the coulombic efficiency exceeds 97%.
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页码：600 / 604
页数：5
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