电解质
环丁砜
化学工程
材料科学
二氧环烷
聚合
阳离子聚合
锂(药物)
离子电导率
快离子导体
无机化学
聚合物
化学
高分子化学
电极
有机化学
物理化学
溶剂
复合材料
内分泌学
工程类
医学
作者
Bo-Han Zhang,Wan-Xin Wen,Huaying Wang,Yun‐Lei Hou,Jingzhou Chen,Dong‐Lin Zhao
标识
DOI:10.1016/j.cej.2023.144990
摘要
The practical application of lithium metal batteries with high energy density are difficult to apply due to the problem of uncontrolled lithium dendrite growth with commercial liquid electrolytes. Herein, we designed a poly 1,3-dioxolane (PDOL) based quasi solid polymer electrolyte with in-situ polymerization. A small amount of lithium difluoro(oxalato)borate (LiDFOB) provides cationic initiation center for the polymerization of dioxolane (DOL). Sulfolane (SL) were further introduced into the system as a cosolvent and the ionic conductivity was increased to 3.22×10-4 S cm-1followed with a high Li+ transfer number of 0.73 at room temperature. Trace amount of SbF3 was introduced to form a robustness inorganic-rich hybrid interface that reduces the decomposition of electrolyte components and retards the formation of lithium dendrites during cycling. The superior rate performance and stable 5 C long cycle performance are obtained in LiFePO4||Li full cell owing to the interaction between Li+, SL and PDOL. This work expands the choice of components in quasi solid electrolytes to manufacture qualified LMBs with enhanced performance.
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