Interface Modification and Halide Substitution To Achieve High Ionic Conductivity in LiBH4-Based Electrolytes for all-Solid-State Batteries.
作者
Hu, Long
Wang, Hui
Liu, Yongfeng
Fang, Fang
Yuan, Bin
Hu, Renzong
ACS applied materials & interfaces
DOI10.1021/acsami.1c22561
出版时间2021-Dec-29 1800
文献类型Journal Article
摘要
A fast solid-state Li-ion conductor Li16(BH4)13I3@g-C3N4 was synthesized using a simple ball-milling process. Because of the combined effect of halide substitution and the formation of an interface between Li16(BH4)13I3 and g-C3N4, Li16(BH4)13I3@g-C3N4 delivers a high ionic conductivity of 3.15 * 10-4 S/cm at 30 °C, which is about 1-2 orders of magnitude higher than that of Li16(BH4)13I3. Additionally, Li16(BH4)13I3@g-C3N4 exhibits good electrochemical stability at a wide potential window of 0-5.0 V (vs Li/Li+) and excellent thermal stability. The Li/Li symmetrical cell based on the Li16(BH4)13I3@g-C3N4 electrolyte achieves long-term cycling with a small increase in overpotential, confirming superior electrochemical stability against Li foil. More importantly, Li16(BH4)13I3@g-C3N4-based Li batteries are compatible with S-C and FeF3 cathodes and MgH2 anodes and can achieve long-term cycling with Li4Ti5O12 anodes at a temperature range from 30 to 60 °C. The developed strategy of coupling halide substitution together with interface modifications may open a new avenue toward the development of LiBH4-based high ionic conductivity electrolytes for room-temperature all-solid-state Li batteries.
关键词
关键词列表LiBH4all-solid-state batteriesg-C3N4halide substitutioninterface modification
作者信息
地址
School of Materials Science and Engineering, Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou 510641, China.
State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China.
Department of Materials Science, Fudan University, Shanghai 200433, China.