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首页> 外文期刊>Advanced energy materials >Selectively Wetted Rigid–Flexible Coupling Polymer Electrolyte Enabling Superior Stability and Compatibility of High-Voltage Lithium Metal Batteries
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Selectively Wetted Rigid–Flexible Coupling Polymer Electrolyte Enabling Superior Stability and Compatibility of High-Voltage Lithium Metal Batteries

机译：选择性地润湿刚性柔性联轴器聚合物电解质，实现高压锂金属电池的稳定性和兼容性

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摘要

Solid polymer electrolytes (SPEs) are considered to be the key to solve the safety hazards and cycling performance of liquid high-voltage lithium metal batteries (HVLMBs), but still suffer from low conductivity and poor interfacial compatibility. Here, polyvinylidene fluoride-polyvinyl acetate-based (PVDF-PVAC) rigid-flexible coupling SPE selectively wetted by a tetramethylene sulfone (TMS) is prepared for high-performance and superior-safety HVLMBs. The intermolecular interactions in such SPE significantly facilitate lithium-ion conductivity and electrolyte/electrode interface wettability. Moreover, PVAC selectively wetted with the TMS enhances interface compatibility with Li anodes and high-voltage LiCoO2 cathodes. As a result, the as-assembled LiCoO2/lithium-metal solid-state batteries present excellent cyclability with 85% capacity retention after 200 cycles between 3.0 and 4.5 V at room temperature. Furthermore, pouch cells with the as-prepared SPE exhibit brilliant safety and superior interfacial compatibility. This study offers a promising and general selectively wetted design strategy to handle the compatibility and safety issues in HVLMBs.
机译：固体聚合物电解质（SPE）被认为是解决液体高压锂金属电池（HVLMBS）的安全危害和循环性能的关键，但仍遭受低导电性和差相差相差。这里，用四亚甲基砜（TMS）选择性地润湿的聚偏二氟乙烯 - 聚乙烯基（PVDF-PVAC）刚性柔性耦合SPE用于高性能和优异的安全性HVLMB。这种SPE中的分子间相互作用显着促进了锂离子电导率和电解质/电极界面润湿性。此外，用TMS选择性地润湿PVAC可提高与LI阳极和高压LiCoO2阴极的界面兼容性。结果，组装的LiCoO2 /锂 - 金属固态电池在室温下在3.0至4.5V的200和4.5V之间的3.0和4.5V之间存在85％的容量保持性。此外，具有AS制备的SPE的袋细胞表现出辉煌的安全性和卓越的界面相容性。本研究提供了有希望和一般的选择性润湿的设计策略，以处理HVLMBS中的兼容性和安全问题。

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  • 来源
    《Advanced energy materials》 |2020年第18期|1903939.1-1903939.9|共9页
  • 作者

    Yu Xinrun; Wang Longlong; Ma Jun; Sun Xingwei; Zhou Xinhong; Cui Guanglei;

  • 作者单位

    Chinese Acad Sci Qingdao Inst Bioenergy & Bioproc Technol Qingdao Ind Energy Storage Res Inst Qingdao 266101 Peoples R China|Qingdao Univ Coll Mat Sci & Engn Qingdao 266071 Peoples R China;

    Chinese Acad Sci Qingdao Inst Bioenergy & Bioproc Technol Qingdao Ind Energy Storage Res Inst Qingdao 266101 Peoples R China|Univ Chinese Acad Sci Ctr Mat Sci & Optoelect Engn Beijing 100049 Peoples R China;

    Chinese Acad Sci Qingdao Inst Bioenergy & Bioproc Technol Qingdao Ind Energy Storage Res Inst Qingdao 266101 Peoples R China;

    Qingdao Univ Sci & Technol Coll Chem & Mol Engn Qingdao 266042 Peoples R China;

    Qingdao Univ Sci & Technol Coll Chem & Mol Engn Qingdao 266042 Peoples R China;

    Chinese Acad Sci Qingdao Inst Bioenergy & Bioproc Technol Qingdao Ind Energy Storage Res Inst Qingdao 266101 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    high voltage; interfacial compatibility; lithium metal batteries; polymer electrolytes; safety and stability;

    机译：高压;界面兼容性;锂金属电池;聚合物电解质;安全性和稳定性;

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