电解质
溶解
材料科学
化学工程
聚合物
聚合
锂(药物)
无机化学
硝酸锂
法拉第效率
化学
电极
离子键合
离子
有机化学
医学
物理化学
工程类
复合材料
内分泌学
作者
Chuyang Jing,Kuan Dai,Dong Liu,Wenran Wang,Libao Chen,Chunxiao Zhang,Weifeng Wei
标识
DOI:10.1016/j.scib.2023.11.039
摘要
High-voltage lithium metal batteries (LMBs) have been considered promising next-generation high-energy-density batteries. However, commercial carbonate electrolytes can scarcely be employed in LMBs owing to their poor compatibility with metallic lithium. N,N-dimethylacrylamide (DMAA)-a crosslinkable solubilizer with a high Gutmann donor number-is employed to facilitate the dissolution of insoluble lithium nitrate (LiNO3) in carbonate-based electrolytes and to form gel polymer electrolytes (GPEs) through in situ polymerization. The Li+ solvation structure of the GPEs is regulated using LiNO3 and DMAA, which suppresses the decomposition of LiPF6 and facilitates the formation of an inorganic-rich solid electrolyte interface. Consequently, the Coulombic efficiency (CE) of the Li||Cu cell assembled with a GPE increases to 98.5% at room temperature, and the high-voltage Li||NCM622 cell achieves a capacity retention of 80.1% with a high CE of 99.5% after 400 cycles. The bifunctional polymer electrolytes are anticipated to pave the way for next-generation high-voltage LMBs.
科研通智能强力驱动
Strongly Powered by AbleSci AI