能源化学(英文版)

能源化学(英文版) ›› 2019, Vol. 39 ›› Issue (12): 88-100.

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Multifunctional binder designs for lithium-sulfur batteries

Qi Qia, Xiaohui Lva, Wei Lva, Quan-Hong Yangb   

  1. a Shenzhen Geim Graphene Center, Engineering Laboratory for Functionalized Carbon Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, Guangdong, China;
    b Nanoyang Group, State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
  • 收稿日期:2019-01-02 修回日期:2019-01-30 出版日期:2019-12-15 发布日期:2020-12-18
  • 通讯作者: Wei Lv, lv.wei@sz.tsinghua.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (Nos. 51772164 and U1601206), the Guangdong Natural Science Funds for Distinguished Young Scholars (2017B030306006), the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01N111), the Guangdong Special Support Program (2017TQ04C664), and the Shenzhen Basic Research Project (Grant Nos. JCYJ20170412171359175).

Multifunctional binder designs for lithium-sulfur batteries

Qi Qia, Xiaohui Lva, Wei Lva, Quan-Hong Yangb   

  1. a Shenzhen Geim Graphene Center, Engineering Laboratory for Functionalized Carbon Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, Guangdong, China;
    b Nanoyang Group, State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
  • Received:2019-01-02 Revised:2019-01-30 Online:2019-12-15 Published:2020-12-18
  • Contact: Wei Lv, lv.wei@sz.tsinghua.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Nos. 51772164 and U1601206), the Guangdong Natural Science Funds for Distinguished Young Scholars (2017B030306006), the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01N111), the Guangdong Special Support Program (2017TQ04C664), and the Shenzhen Basic Research Project (Grant Nos. JCYJ20170412171359175).

摘要： Lithium-sulfur (Li-S) batteries are promising next-generation high energy density batteries but their practical application is hindered by several key problems, such as the intermediate polysulfide shuttling and the electrode degradation caused by the sulfur volume changes. Binder acts as one of the most essential components to build the electrodes of Li-S batteries, playing vital roles in improving the performance and maintaining the integrity of the cathode structure during cycling, especially those with high sulfur loadings. To date, tremendous efforts have been devoted to improving the properties of binders, in terms of the viscosity, elasticity, stability, toughness and conductivity, by optimizing the composition and structure of polymer binders. Moreover, the binder modification endows them strong polysulfide trapping ability to suppress the shuttling and decreases the swelling to maintain the porous structure of cathode. In this review, we summarize the recent progress on the binders for Li-S batteries and discuss the various routes, including the binder combination use, functionalization, in-situ polymerization and ion cross-linking, etc., to enhance their performance in stabilizing the cathode, building the high sulfur loading electrode and improving the cyclic stability. At last, the design principles and the problems in further applications are also highlighted.

关键词: Polymer binders, Natural polymers, Artificial polymers, Combination, Modification

Abstract: Lithium-sulfur (Li-S) batteries are promising next-generation high energy density batteries but their practical application is hindered by several key problems, such as the intermediate polysulfide shuttling and the electrode degradation caused by the sulfur volume changes. Binder acts as one of the most essential components to build the electrodes of Li-S batteries, playing vital roles in improving the performance and maintaining the integrity of the cathode structure during cycling, especially those with high sulfur loadings. To date, tremendous efforts have been devoted to improving the properties of binders, in terms of the viscosity, elasticity, stability, toughness and conductivity, by optimizing the composition and structure of polymer binders. Moreover, the binder modification endows them strong polysulfide trapping ability to suppress the shuttling and decreases the swelling to maintain the porous structure of cathode. In this review, we summarize the recent progress on the binders for Li-S batteries and discuss the various routes, including the binder combination use, functionalization, in-situ polymerization and ion cross-linking, etc., to enhance their performance in stabilizing the cathode, building the high sulfur loading electrode and improving the cyclic stability. At last, the design principles and the problems in further applications are also highlighted.

Key words: Polymer binders, Natural polymers, Artificial polymers, Combination, Modification