Acta Metallurgica Sinica (English Letters) ›› 2025, Vol. 38 ›› Issue (9): 1637-1644.DOI: 10.1007/s40195-025-01883-5

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A Self-Sacrifice Template Method to Produce FeS Encapsulated into N, S Co-Doped Carbon for Improved Lithium Storage Performance

Xu Liu1, Lan-Yun Yang1, Li-Ting Zeng1, Yun Peng1, Chen-Xi Xu2(), Lei Li3, Jia-Le Sun4, Yang-Yang Chen3, Liang Chen1(), Zhao-Hui Hou1   

  1. 1 Key Laboratory of Hunan Province for Advanced Carbon-Based Functional Materials, School of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, 414006, China
    2 School of Chemistry and Chemical Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
    3 College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
    4 College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
  • Received:2024-12-29 Revised:2025-02-19 Accepted:2025-03-12 Online:2025-09-10 Published:2025-06-18
  • Contact: Chen-Xi Xu, xcx9927@126.com;Liang Chen, clvilance@163.com

Abstract:

The development of high-performance transition metal sulfide (TMS)/carbon composites to replace conventional graphite anode remains a critical challenge for advancing lithium-ion batteries (LIBs). In this study, a facile self-sacrifice template method is developed to prepare FeS encapsulated into N, S co-doped carbon (FeS/NSC) composite using melamine-cyanuric acid (MCA) supermolecule as a multifunctional template precursor. The function of MCA supermolecule for material synthesis is explored, revealing its special function as a dispersant, dopant and pore-forming agent. Furthermore, the effect of Fe source dosage on the morphology, structure and composition of the final products is explored. The resultant FeS/NSC-0.1 (where 0.1 represents the mass of added Fe source) exhibits the most optimal proportion, characterized by a good dispersion status of FeS within the NSC matrix, effective N, S co-doping and ample porosity. Benefiting from these merits, the FeS/NSC-0.1 anode demonstrates significantly improved cycling stability and rate capability when compared to the counterparts. Undoubtedly, this work offers a universal method to produce advanced transition metal sulfide/carbon composite electrodes for energy storage and conversion systems.

Key words: Lithium-ion batteries, Lithium storage performance, Self-sacrifice template method, Melamine-cyanuric acid (MCA) supermolecule, FeS encapsulated into N, S co-doped carbon (FeS/NSC) composite