Inorganic Chemicals Industry ›› 2024, Vol. 56 ›› Issue (9): 12-23.doi: 10.19964/j.issn.1006-4990.2024-0059

• Reviews and Special Topics • Previous Articles     Next Articles

Recent research progress of lithium-sulfur batteries based on solid-solid reaction mechanism

CHEN Xue1,2,3(), OUYANG Quansheng1,2,3(), SHAO Jiaojing3,4()   

  1. 1.Advanced Batteries and Materials Engineering Research Center,Guizhou Light Industry Technical College,Guiyang 561113,China
    2.Provincial Collaborative Innovation Center of Used Power Batteries Recycling,Guiyang 561113,China
    3.Graphene Materials Engineering Research Center of Guizhou Colleges and Universities,Guiyang 561113,China
    4.School of Materials and Metallurgy,Guizhou University,Guiyang 550025,China
  • Received:2024-01-29 Online:2024-09-10 Published:2024-09-26
  • Contact: OUYANG Quansheng, SHAO Jiaojing E-mail:1548582799@qq.com;qsouyang@163.com;shaojiao_jing@163.com

Abstract:

Lithium sulfur batteries are considered to be promising energy storage devices due to their high theoretical energy density,as well as the advantages of environmental friendliness and low-cost of sulfur.However,sulfur cathodes usually react with lithium ions under solid-liquid-solid biphasic reaction mechanism in conventional ether-based electrolytes,which generates intermediate products of lithium polysulfides and leads to the irreversible loss of active materials and corrosion of lithium anodes.Hence,it is vital to develop sulfur cathodes operating on sold-solid reaction mechanism without dissolving of lithium polysulfides into electrolytes.At present,vast research revealed that the realization of sulfur cathodes based on solid-solid reaction mechanism could be achieved by rational design of cathode materials,regulating the electrolyte systems,or their synergistic design,which thus improved the electrochemical performance of lithium sulfur batteries.The strategies towards achieving solid-solid reaction mechanism of sulfur cathodes in recent years were summarized and the detailed mechanism was discussed.Finally,the development prospect of constructing practical lithium-sulfur batteries with high energy density was put forward,aiming at solving the problems of lithium anode corrosion under the condition of lean electrolyte and the sluggish reaction kinetics based on the solid-solid reaction mechanism of sulfur cathode.

Key words: lithium sulfur batteries, cathode materials design, electrolytes modification, solid-solid reaction mechanism

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