Li-Rich Antiperovskite/Nitrile Butadiene Rubber Composite Electrolyte for Sheet-Type Solid-State Lithium Metal Battery

Frontiers in Chemistry

Zhouguang Lu¹  Muqing Li¹  Wen Luo¹  Huimin Yuan¹  Bei Deng²  Shuai Li²  Lihong Yin²  Sifan Ling²  Yusheng Zhao²  Xuedan Chen²  Wei Xia⁴  Long Kong⁴  Juncao Bian⁴  Haibin Lin⁴  Ruo Zhao⁴ 

[1] Department of Materials Science and Engineering, SUSTech, Shenzhen, China;Department of Physics, SUSTech, Shenzhen, China;Guangdong Provincial Key Laboratory of Energy Materials for Electric Power, Academy for Advanced Interdisciplinary Studies, SUSTech, Shenzhen, China;Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices, Academy for Advanced Interdisciplinary Studies, SUSTech, Shenzhen, China;Shenzhen Key Laboratory of Solid State Batteries, Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology (SUSTech), Shenzhen, China;

关键词: solid-state batteries;    anti-perovskite;    solid-state electrolyte;    composite electrolyte;    sheet-type;   

DOI  :  10.3389/fchem.2021.744417

来源: DOAJ

【 摘 要 】

Lithium-rich antiperovskites (LiRAPs) hold great promise to be the choice of solid-state electrolytes (SSEs) owing to their high ionic conductivity, low activation energy, and low cost. However, processing sheet-type solid-state Li metal batteries (SSLiB) with LiRAPs remains challenging due to the lack of robust techniques for battery processing. Herein, we propose a scalable slurry-based procedure to prepare a flexible composite electrolyte (CPE), in which LiRAP (e.g., Li2OHCl0.5Br0.5, LOCB) and nitrile butadiene rubber (NBR) serve as an active filler and as a polymer scaffold, respectively. The low-polar solvent helps to stabilize the LiRAP phase during slurry processing. It is found that the addition of LOCB into the NBR polymer enhances the Li ion conductivity for 2.3 times at 60°C and reduces the activation energy (max. 0.07 eV). The as-prepared LOCB/NBR CPE film exhibits an improved critical current of 0.4 mA cm−2 and can stably cycle for over 1000 h at 0.04 mA cm−2 under 60°C. In the SSLiB with the sheet-type configuration of LiFePO4(LFP)||LOCB/NBR CPE||Li, LFP exhibits a capacity of 137 mAh/g under 60 at 0.1°C. This work delivers an effective strategy for fabrication of LiRAP-based CPE film, advancing the LiRAP-family SSEs toward practical applications.

【 授权许可】

Unknown