SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2022, Vol. 43 ›› Issue (3): 202-215.DOI: 10.1016/j.cjche.2021.07.008

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Improving ionic conductivity of polymer-based solid electrolytes for lithium metal batteries

Q. Yang1, A. Wang1, J. Luo1,2, W. Tang2   

  1. 1. Key Laboratory for Green Chemical Technology of Ministry of Education, State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
    2. Shanghai Key Lab of Advanced High-Temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2021-02-28 Revised:2021-07-14 Online:2022-04-28 Published:2022-03-28
  • Contact: W. Tang,E-mail:wenjingtang@tju.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (51872196), the Natural Science Foundation of Tianjin, China (17JCJQJC44100) and the National Postdoctoral Program for Innovative Talents, China (BX20190232).

Improving ionic conductivity of polymer-based solid electrolytes for lithium metal batteries

Q. Yang1, A. Wang1, J. Luo1,2, W. Tang2   

  1. 1. Key Laboratory for Green Chemical Technology of Ministry of Education, State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
    2. Shanghai Key Lab of Advanced High-Temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  • 通讯作者: W. Tang,E-mail:wenjingtang@tju.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (51872196), the Natural Science Foundation of Tianjin, China (17JCJQJC44100) and the National Postdoctoral Program for Innovative Talents, China (BX20190232).

Abstract: Because of its superior safety and excellent processability, solid polymer electrolytes (SPEs) have attracted widespread attention. In lithium based batteries, SPEs have great prospects in replacing leaky and flammable liquid electrolytes. However, the low ionic conductivity of SPEs cannot meet the requirements of high energy density systems, which is also an important obstacle to its practical application. In this respect, escalating charge carriers (i.e. Li+) and Li+ transport paths are two major aspects of improving the ionic conductivity of SPEs. This article reviews recent advances from the two perspectives, and the underlying mechanism of these proposed strategies is discussed, including increasing the Li+ number and optimizing the Li+ transport paths through increasing the types and shortening the distance of Li+ transport path. It is hoped that this article can enlighten profound thinking and open up new ways to improve the ionic conductivity of SPEs.

Key words: Solid polymer electrolyte, Ion conductivity, Charge carriers, Transport paths, Lithium battery

摘要: Because of its superior safety and excellent processability, solid polymer electrolytes (SPEs) have attracted widespread attention. In lithium based batteries, SPEs have great prospects in replacing leaky and flammable liquid electrolytes. However, the low ionic conductivity of SPEs cannot meet the requirements of high energy density systems, which is also an important obstacle to its practical application. In this respect, escalating charge carriers (i.e. Li+) and Li+ transport paths are two major aspects of improving the ionic conductivity of SPEs. This article reviews recent advances from the two perspectives, and the underlying mechanism of these proposed strategies is discussed, including increasing the Li+ number and optimizing the Li+ transport paths through increasing the types and shortening the distance of Li+ transport path. It is hoped that this article can enlighten profound thinking and open up new ways to improve the ionic conductivity of SPEs.

关键词: Solid polymer electrolyte, Ion conductivity, Charge carriers, Transport paths, Lithium battery