材料科学
离子液体
电解质
聚合物
聚合
离子
聚合物电解质
图层(电子)
化学工程
离子键合
高分子化学
纳米技术
离子电导率
有机化学
复合材料
物理化学
催化作用
化学
电极
工程类
作者
Lingwang Liu,Jiang‐Yan Xue,Yang Liu,Shouxiang Lu,Suting Weng,Zhicheng Wang,Fengrui Zhang,Daosong Fu,Jingjing Xu,Xiaodong Wu
标识
DOI:10.1021/acsami.3c18308
摘要
Polymerized ionic liquid (PIL)-based gel polymer electrolytes (GPEs) are well known as highly safe and stable electrolytes but with low ambient ionic conductivity. Herein, we first designed and synthesized an IL monomer with a long and flexible side chain and then mixed it with LiTFSI and MEMPTFSI to construct a PIL-based GPE (denoted as GM-GPE). The special molecular structure of the monomer greatly improves the ionic transport through the PIL chain, and the introduction of MEMPTFSI plasticizer further improves the ionic conductivity, promoting a TFSI–-anion-derived SEI formation to suppress Li dendrite growth and forming an electrostatic shielding effect of MEMP+ cations to promote the uniform deposition of Li+. Consequently, the as-prepared GM-GPE exhibits high ambient ionic conductivity (4.3 × 10–4 S cm–1, 30 °C), robust electrochemical stability, excellent thermal stability, nonflammability, and superior ability to inhibit Li dendrite growth. The resultant LiFePO4|GM-GPE|Li cell exhibits a high discharge capacity of 150 mA h g–1 at 0.2 C along with a good cycling stability and rate capability. This work brings about new guidance for the development of high-quality GPEs with high ionic conductivity, high stability, and safety for long cycling and dendrite-free lithium metal batteries.
科研通智能强力驱动
Strongly Powered by AbleSci AI