Chinese Journal of Catalysis ›› 2024, Vol. 63: 224-233.DOI: 10.1016/S1872-2067(24)60096-3

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Catalytically altering the redox pathway of sulfur in propylene carbonate electrolyte using dual-nitrogen/oxygen-containing carbon

Linghui Yua,b,c,*(), Heng Zhanga, Luyuan Paul Wangb, Samuel Jun Hoong Ongb, Shibo Xid, Bo Chenb, Rui Guoe, Ting Wangf, Yonghua Dug, Wei Chene, Ovadia Levh, Zhichuan J. Xub,i,*()   

  1. aSchool of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, Hubei, China
    bSchool of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
    cHubei Key Laboratory of Biomass Fibers & Eco-Dyeing & Finishing, Wuhan Textile University, Wuhan 430200, Hubei, China
    dInstitute of Sustainability for Chemicals, Energy and Environment (ISCE2), Agency for Science, Technology and Research in Singapore (A*STAR), 1 Pesek Road, Jurong Island 627833, Singapore
    eDepartment of Chemistry, National University of Singapore, Singapore 117543, Singapore
    fCollege of the Environment & Ecology, Xiamen University, Xiamen 361102, Fujian, China
    gNational Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY 11973, USA
    hThe Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
    iSingapore-HUJ Alliance for Research and Enterprise, NEW-CREATE Phase II, Campus for Research Excellence and Technological Enterprise (CREATE), Singapore138602, Singapore
    jEnergy Research Institute@NTU, ERI@N, Interdisciplinary Graduate School, Nanyang Technological University, Singapore 639798, Singapore
  • Received:2024-05-04 Accepted:2024-06-26 Online:2024-08-18 Published:2024-08-19
  • Contact: *E-mail: xuzc@ntu.edu.sg (Z. Xu),lhyu@wtu.edu.cn (L. Yu).

Abstract:

Carbonate electrolytes are one of the most desirable electrolytes for high-energy lithium-sulfur batteries (LSBs) because of their successful implementation in commercial Li-ion batteries. The low-polysulfide-solubility feature of some carbonate solvents also makes them very promising for overcoming the shuttle effects of LSBs. However, regular sulfur electrodes experience undesired electrochemical mechanisms in carbonate electrolytes due to side reactions. In this study, we report a catalytic redox mechanism of sulfur in propylene carbonate (PC) electrolyte based on a comparison study. The catalytic mechanism is characterized by the interactions between polysulfides and dual N/O functional groups on the host carbon, which largely prevents side reactions between polysulfides and the carbonate electrolyte. Such a mechanism coupled with the low-polysulfide-solubility feature leads to stable cycling of LSBs in PC electrolyte. Favorable dual N/O functional groups are identified via a density functional theory study. This work provides an alternative route for enabling LSBs in carbonate electrolytes.

Key words: Energy storage, Lithium-sulfur battery, Catalytic redox reaction, Porous carbon, Carbonate electrolyte