Li<sup>+</sup>电池固态聚合物电解质研究进展

摘要固态聚合物电解质具有高安全性、高成膜性和黏弹性等优点，并与电极具有良好的接触性和相容性，是实现高安全性和高能量密度固态Li⁺电池的重要电解质体系。然而聚合物电解质室温离子电导率较低（10^-8~10^-6 S·cm^-1），不能满足固态聚合物电池在常温运行的需求。因此，在提高离子电导率、机械强度和电化学稳定性等本征属性的基础上，同时探究改善电解质/电极的界面处及电极内部的离子输运是研发固态聚合物Li⁺电池面临的关键问题。主要从改性聚合物电解质用以提高Li⁺电池电化学性能的角度出发，综述了凝胶聚合物电解质、全固态聚合物电解质和复合固态电解质中的离子输运机制及其关键参数，总结了近年来聚合物电解质的最新研究进展和未来的发展方向。

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	陈立坤
	胡懿
	马家宾
	黄妍斐
	俞静
	贺艳兵
	康飞宇

关键词：固态聚合物电池；固态电解质；离子电导率；离子输运；界面阻抗

Abstract： Polymer electrolytes are widely considered as promising candidates for all-solid-state lithium-ion batteries with high safety and energy density. They have several specific advantages such as high safety, good film reforming properties, viscoelasticity, excellent contact and compatibility with electrodes. However, polymer electrolytes cannot meet the requirements of solid polymer batteries operating because of its insufficient ionic conductivity(10^-8~10^-6 S·cm^-1) at room temperature. Therefore, it is important to improve the ionic conductivity, mechanical strength, electrochemical stability and other intrinsic properties. Meanwhile, the key factor for developing solid polymer lithium ion battery is to explore the improvement of electrolyte/electrode interface and ion transport pathway inside the electrode. In this paper, we review the ion transport mechanism and the key parameters for gel polymer electrolytes, all-solid-state polymer electrolytes and composite solid electrolytes. We also summarize the recent advances and future development direction of polymer electrolytes.

Keywords： solid polymer battery； solid-state electrolytes； ionic conducticity； ionic transport； interface impedance

Received 2019-09-14;

Fund:国家自然科学基金项目（51672156）。

Corresponding Authors: 贺艳兵,E-mail:he.yanbing@sz.tsinghua.edu.cn。 Email: he.yanbing@sz.tsinghua.edu.cn

About author: 陈立坤(1997-),男,硕士研究生,现从事固态聚合物电解质方面的研究。

引用本文:

陈立坤, 胡懿, 马家宾, 黄妍斐, 俞静, 贺艳兵, 康飞宇.Li⁺电池固态聚合物电解质研究进展[J]. 化学工业与工程, 2020,37(1): 2-16

Chen Likun, Hu Yi, Ma Jiabin, Huang Yanfei, Yu Jing, He Yanbing, Kang Feiyu.Research Progress of Solid Polymer Electrolytes for Lithium-Ion Batteries[J]. Chemcial Industry and Engineering, 2020,37(1): 2-16

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