A free-standing and thermostable polymer/plastic crystal electrolyte for all-solid-state lithium batteries

作者：Dong, Yuan; Ding, Tianjie; Fan, Li-Zhen^*

来源：Ionics, 2017, 23(12): 3339-3345.

DOI：10.1007/s11581-017-2152-4

• All-solid-state lithium batteries
• Composite electrolytes
• Plastic crystal electrolyte
• Electrical properties
• Thermal properties

All-solid-state lithium batteries using flexible solid electrolytes instead of combustible organic liquid electrolytes are the ultimate solution to address the safety problem of commercialized lithium ion batteries. In this study, a free-standing and thermostable polymer/plastic crystal composite electrolyte (PPCE) based on polymerized trimethylolpropane trimethacrylate (TMPTMA)-1, 6-hexanediol diacrylate (HDDA) matrix, and plastic crystal electrolyte was prepared for all-solid-state lithium batteries. The polymerized TMPTMA-HDDA-based matrix of a porous network structure coupled with plastic crystal electrolyte (PCE) in the pores reveals good compatibility. The as-synthesized PPCE possesses excellent flexible performance, thermostability, and high conductivity, showing that PPCE can reach 8.53 x 10(-4) S cm(-1) with 7.5 wt% monomers (PPCE-7.5%) at 25 A degrees C under a stability electrochemical window above 5.2 V. The assembled lithium batteries Li|PPCE|LiFePO4 exhibit high capacity and highly cycling stability at room temperature, indicating great potential of all-solid-state lithium batteries.

• 出版日期2017-12
• 单位北京科技大学