Chem. J. Chinese Universities ›› 2023, Vol. 44 ›› Issue (1): 20220619.doi: 10.7503/cjcu20220619

• Review • Previous Articles     Next Articles

Design, Regulation and Applications in Lithium-sulfur Battery Cathodes of Yolk-shell Nanoreactors

WU Yujie1, HUANG Wenzhi1, PAN Junda1, SHI Kaixiang1,2, LIU Quanbing1,2()   

  1. 1.Guangzhou Key Laboratory of Clean Transportation Energy Chemistry,Guangdong Provincial Key Laboratory of Plant Resources Biorefinery,School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou 510006,China
    2.Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory,Jieyang 515200,China
  • Received:2022-09-15 Online:2023-01-10 Published:2022-10-25
  • Contact: LIU Quanbing E-mail:liuqb@gdut.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21975056)

Abstract:

Lithium-sulfur batteries have attracted much attention due to their high theoretical energy density, which are considered as one of the most promising class of new secondary batteries. In view of the sulfur cathode, there are problems such as the insulation properties of sulfur and lithium sulfide, the diffusion of soluble polysulfides, the volume expansion of sulfur in the cycle process, and the slow dynamics of the redox process, which seriously restricts the activity and cycle stability of the lithium-sulfur battery. Yolk-shell nanoreactors, with easy to regulate “yolk”, “shell”, and “void”, can alleviate the electrode volume in the process of charge and discharge change, provide fast ion/electron transport channel, strengthen polysulfide adsorption and improve catalytic conversion reaction, etc., thus significantly improve the electrode stability, activity and cycle performance, conducive to promoting the commercialization process in lithium sulfur battery. Thus, we summarize the design and regulation strategy of yolk-shell nanoreactors, including single-yolk-single-shell, single-yolk-multi-shell, multi-yolk-single-shell and multi-yolk-multi-shell. Furthermore, combined with the working characteristics and current application problems of lithium-sulfur battery, the application prospect and future development are also discussed.

Key words: Yolk-shell structure, Design, Regulation, Lithium-sulfur battery, Nanoreactors

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