电解质
材料科学
离子电导率
共晶体系
锂(药物)
聚合物
化学工程
电池(电)
电导率
快离子导体
复合材料
化学
电极
物理化学
微观结构
医学
物理
工程类
内分泌学
量子力学
功率(物理)
作者
Yanqing Wang,Rui Xu,Bowen Xiao,Dong Liang,Peng Yu,Yun Zheng,Yang-Huan Shen,Jingchao Chai,Xiaohua Li,Shiyu Luo,Xinyi Wang,Xinmiao Liang,Jiwen Feng,Zhihong Liu
标识
DOI:10.1016/j.mtphys.2022.100620
摘要
Solid-state polymer electrolytes have recently drawn intense attention as alternatives to traditional liquid electrolytes in lithium batteries due to their high energy-density and reliable safety. Unfortunately, current all-solid-state polymer electrolytes suffer from the low ionic conductivity, limiting the power density of energy storage batteries. Here, we propose a deep-eutectic electrolyte, formed directly by the interaction between poly (1,3-dioxolane) and lithium salt without other auxiliary solvents. The ionic conductivity of the designed deep-eutectic polymer electrolyte can approach to 1.5 × 10−5 S/cm at ambient temperature, which is twenty times higher than that of polyethylene oxide-based electrolytes. Specifically, solid-state NMR verifies the interaction between oxygen in poly (1,3-dioxolane) and lithium ion. The LiFePO4/Li battery assembled with deep-eutectic polymer electrolyte delivers a discharge capacity of 139.6 mAh/g at 0.1 C and a capacity retention of 90% after 200 cycles at 0.2 C. Pouch LiFePO4/Li batteries also present excellent safety performances. This finding provides a new approach for materials engineering of polymer electrolytes for advanced lithium batteries.
科研通智能强力驱动
Strongly Powered by AbleSci AI