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 language | English |
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Article number | e202101519 |
Journal | ChemElectroChem |
Volume | 9 |
Issue number | 9 |
DOIs | |
Publication status | Published - 13 May 2022 |
Keywords
- Electrochemistry
- Energy storage
- Lithium-sulfur batteries (LSBs)
- MoC@CNF
- Shuttle effect