1T-MoS2 nanotubes wrapped with N-doped graphene as highly-efficient absorbent and electrocatalyst for Li–S batteries

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

  • Bo Yu, University of Electronic Science and Technology of China
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  • Yuanfu Chen, University of Electronic Science and Technology of China, Tibet University
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  • Zegao Wang, Sichuan University
  • ,
  • Dongjiang Chen, University of Electronic Science and Technology of China
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  • Xinqiang Wang, University of Electronic Science and Technology of China
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  • Wanli Zhang, University of Electronic Science and Technology of China
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  • Jiarui He, University of Texas at Austin
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  • Weidong He, University of Electronic Science and Technology of China

A novel three-dimensional porous graphene/MoS2 hybrid is synthesized through a facile spray-drying approach. This hybrid is constructed with two-dimensional N-doped graphene nanosheets wrapping one-dimensional nanotubes self-assembled by vertically oriented few-layered 1T-MoS2. Due to its well-designed nanoarchitecture, the hybrid owns several advantages: the metallic 1T-MoS2 and highly conductive graphene skeleton facilitates electron transfer; with abundant specific area and electrocatalytic active sites, the unique hollow nano-architecture enables efficient electrolyte infiltration and Li-ion transfer. The experiments of lithium polysulfides adsorption and in-situ Raman spectra confirm that the hybrid acts as both excellent chemical absorbant and high-efficiency electrocatalyst for the transition of long-chain lithium polysulfides. Benefiting from these merits, the cathode delivers outstanding electrochemical properties with a superior reversible capacity of 1219 mAh g−1 (after 200 cycles at 0.2 C), a low long-term cycling capacity decay of 0.039% per cycle (500 cycles at 1 C), and excellent rate performances.

Original languageEnglish
Article number227364
JournalJournal of Power Sources
Volume447
Number of pages10
ISSN0378-7753
DOIs
Publication statusPublished - 31 Jan 2020

    Research areas

  • 1T MoS nanotubes, Electrocatalyst, Li–S batteries, N-doped graphene, Spray-dried

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