title: A Rechargeable Li-Air Fuel Cell Battery Based on Garnet Solid Electrolytes.
abstract: Non-aqueous Li-air batteries have been intensively studied in the past few years for their theoretically super-high energy density. However, they cannot operate properly in real air because they contain highly unstable and volatile electrolytes. Here, we report the fabrication of solid-state Li-air batteries using garnet (i.e., Li6.4La3Zr1.4Ta0.6O12, LLZTO) ceramic disks with high density and ionic conductivity as the electrolytes and composite cathodes consisting of garnet powder, Li salts (LiTFSI) and active carbon. These batteries run in real air based on the formation and decomposition at least partially of Li2CO3. Batteries with LiTFSI mixed with polyimide (PI:LiTFSI) as a binder show rechargeability at 200 °C with a specific capacity of 2184 mAh g-1carbonat 20 μA cm-2. Replacement of PI:LiTFSI with LiTFSI dissolved in polypropylene carbonate (PPC:LiTFSI) reduces interfacial resistance, and the resulting batteries show a greatly increased discharge capacity of approximately 20300 mAh g-1carbonand cycle 50 times while maintaining a cutoff capacity of 1000 mAh g-1carbonat 20 μA cm-2and 80 °C. These results demonstrate that the use of LLZTO ceramic electrolytes enables operation of the Li-air battery in real air at medium temperatures, leading to a novel type of Li-air fuel cell battery for energy storage.
authors.affiliation: State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.|University of Chinese Academy of Sciences, Beijing 100039, China.
authors.forename: Jiyang
authors.initials: J
authors.lastname: Sun
authors.affiliation: College of Physics, Qingdao University, Qingdao 266071, China.
authors.forename: Ning
authors.initials: N
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
authors.forename: Yiqiu
authors.initials: Y
authors.lastname: Li
authors.affiliation: State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
authors.forename: Xiangxin
authors.initials: X
authors.lastname: Guo
authors.affiliation: State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences, Shanghai 200050, China.
authors.forename: Xuefei
authors.initials: X
authors.lastname: Feng
authors.affiliation: State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences, Shanghai 200050, China.
authors.forename: Xiaosong
authors.initials: X
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences, Shanghai 200050, China.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Liu
authors.affiliation: Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China.
authors.forename: Guanglei
authors.initials: G
authors.lastname: Cui
authors.affiliation: Institute of Physics, Chinese Academy of Sciences, Zhongguancun South 3rd Street No. 8, Beijing 100190, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Zheng
authors.affiliation: Institute of Physics, Chinese Academy of Sciences, Zhongguancun South 3rd Street No. 8, Beijing 100190, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Gu
authors.affiliation: Institute of Physics, Chinese Academy of Sciences, Zhongguancun South 3rd Street No. 8, Beijing 100190, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Li