材料科学
电解质
四氟乙烯
聚合物
化学工程
复合数
离子电导率
阴极
锂(药物)
热稳定性
膜
复合材料
电极
共聚物
化学
医学
物理化学
工程类
内分泌学
生物化学
作者
Qian Liang,Xuezhi Liu,Junyan Tang,Xiaohong Yan,He Li,En Chen,Shao-Hua Wu,Junjie Liu,Mi Tang,Zhiquan Chen,Zhengbang Wang
出处
期刊:Small
[Wiley]
日期:2023-12-15
标识
DOI:10.1002/smll.202306994
摘要
Abstract The performances of solid‐state polymer electrolytes are urgently required to be further improved for high energy density lithium metal batteries. Herein, a highly reinforced ultrathin composite polymer electrolyte (PLPP) is successfully fabricated in a large scale by densely filling the well‐dispersed mixture of polyethylene oxide (PEO), Li‐salt (LiTFSI) and a polymer of intrinsic microporosity (PIM‐1) into porous poly(tetrafluoroethylene) (PTFE) matrix. Based on the macro‐plus‐micro synergistic enhancement of the PTFE with excellent mechanical properties and the soluble PIM‐1 with suitable functional groups, the PLPP electrolyte exhibits excellent properties including mechanical stress, thermal stability, lithium‐ion transference number, voltage window and ionic conductivity, which are all superior to the typical PEO/LiTFSI electrolytes. As a result, the Li/PLPP/Li symmetric cell can stably cycle for > 2000 h, and the LiFePO 4 /PLPP/Li full cell exhibits excellent rate performance (>10 C) and high cycling stability with an initial capacity of 158.8 mAh g −1 and a capacity retention of 78.8% after 300 cycles. In addition, the excellent mechanical properties as well as the wide voltage window reasonably result in the stable operation of full cells with either high‐loading cathode up to 28.1 mg cm −2 or high voltage cathode with high energy density.
科研通智能强力驱动
Strongly Powered by AbleSci AI