Mo2C-Embedded Carbon Nanofibers as the Interlayer in High-Performance Lithium-Sulfur Batteries

Tongtong Deng, Wang Sun*, Yuqiong Mao, Jing Huang, Liuliu He, Xinyue Dou, Yu Bai, Zhenhua Wang, Kening Sun

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Lithium-sulfur batteries (LSBs) are among the most encouraging competitors for the next-generation energy storage system, nevertheless, the shuttle effect resulted from the soluble lithium polysulfides (LiPSs) and slow chemical kinetics hinder the pragmatic application of LSBs. To address those issues, herein, a uniform three-dimensional (3D) structure constructing carbon nanofibers (CNF) with polar Mo2C nanoparticles (Mo2C@CNF) was designed and coated onto one side of pristine conventional polypropylene separator (Mo2C@CNF/PP). The Mo2C@CNF with high electrical conductivity not only chemically constrained the LiPSs by chemical trapping, but also catalyzed the conversion of LiPSs to Li2S2/Li2S. Cells with Mo2C@CNF/PP separator presented a high specific capacity of 732.9 mAh g−1; 500 mAh g−1 was kept, due to sluggish capacity decay (0.063 % per cycle), after 500 cycles. Judging from the outstanding electrochemical performance of batteries with the Mo2C@CNF/PP separator, the proposal is an enlightening strategy for the advancement high-performance LSBs.

Original languageEnglish
Article numbere202101519
JournalChemElectroChem
Volume9
Issue number9
DOIs
Publication statusPublished - 13 May 2022

Keywords

  • Electrochemistry
  • Energy storage
  • Lithium-sulfur batteries (LSBs)
  • MoC@CNF
  • Shuttle effect

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Deng, T., Sun, W., Mao, Y., Huang, J., He, L., Dou, X., Bai, Y., Wang, Z., & Sun, K. (2022). Mo2C-Embedded Carbon Nanofibers as the Interlayer in High-Performance Lithium-Sulfur Batteries. ChemElectroChem, 9(9), Article e202101519. https://doi.org/10.1002/celc.202101519