In Situ Lithiophilic Layer from H+/Li+ Exchange on Garnet Surface for the Stable Lithium-Solid Electrolyte Interface

被引:89
作者
Cai, Mingli [1 ,2 ]
Lu, Yang [1 ,2 ]
Su, Jianmeng [1 ,2 ]
Ruan, Yadong [1 ,2 ]
Chen, Chunhua [3 ]
Chowdari, Bobba V. R. [4 ]
Wen, Zhaoyin [1 ,2 ]
机构
[1] Chinese Acad Sci, Shanghai Inst Ceram, CAS Key Lab Mat Energy Convers, Shanghai 200050, Peoples R China
[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
[3] Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
[4] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore
基金
国家重点研发计划; 中国国家自然科学基金;
关键词
garnet electrolytes; H+/Li+ exchange; AgNO3 aqueous solution; in situ modification; interfacial stability; solid-state Li batteries; DOPED LI7LA3ZR2O12; STATE ELECTROLYTE; LI+ CONDUCTIVITY; STABILITY; RESISTANCE; ANODE;
D O I
10.1021/acsami.9b13190
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Garnet-type solid-state electrolytes (SSEs) show a promising application in solid-state Li batteries. Poor interfacial contact with lithium causing large interfacial impedance and dendrite penetration is a problem. Inspired by unique H+/Li+ exchange of garnet electrolyte, we used an AgNO3 aqueous solution induced strategy to construct a lithiophilic layer in situ on the garnet surface without any specific apparatus. Experimental analysis reveals the uniform distribution of Ag nanoparticles and significantly enhanced affinity between the solid state electrolyte (SSE) and Li anode for the Li-Ag alloying. As expected, the interfacial area specific resistance (ASR) is greatly reduced to similar to 4.5 Omega cm(-2), accompanying with long-cycling stability for similar to 3500 h at 0.2 mA cm(-2) and high critical current density of 0.75 mA cm(-2). With modified SSEs, quasi-solid-state batteries with a LiFePO4 or LiNi0.5Co0.2Mn0.3O2 cathode operate well at room temperature and an all-solid-state LiFePO4 /garnet/Li battery displays good cycling stability for over 200 cycles at 60 degrees C.
引用
收藏
页码:35030 / 35038
页数:9
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