Solution Synthesis of VSe2 Nanosheets and Their Alkali Metal Ion Storage Performance

Fangwang Ming, Hanfeng Liang, Yongjiu Lei, Wenli Zhang, Husam N. Alshareef

Research output: Contribution to journalArticlepeer-review

76 Scopus citations

Abstract

Vanadium diselenide (VSe2) is a transition metal dichalcogenide with metallic conductivity, which makes it a potentially promising electrode material for electrochemical applications. However, the development of VSe2 electrodes for such applications has been severely hampered by the difficulty of preparing nanosized products. In this work, a new facile solvothermal synthesis process is developed and optimized to synthesize ultrathin VSe2 nanosheet assemblies. To obtain the ultrathin nanosheets, N-methyl pyrrolidone, which has similar surface energy to many transition metal dichalcogenides, was used as the solvent to limit the crystal growth along the c-axis direction. The resulting ultrathin VSe2 nanosheets exhibit good performance toward alkaline ion (Li+ and Na+) storage, which can be significantly enhanced by carbon coating. Specifically, the carbon-coated VSe2 nanosheets can deliver high capacities of 768 mA h g-1 (Li+ storage) and 571 mA h g-1 (Na+ storage) along with outstanding stability.
Original languageEnglish (US)
Pages (from-to)11-16
Number of pages6
JournalNano Energy
Volume53
DOIs
StatePublished - Aug 18 2018

Bibliographical note

KAUST Repository Item: Exported on 2021-09-14
Acknowledgements: Research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST). Fangwang Ming thanks Mr. Fan Zhang, Dr. Bilal Ahmed (KAUST) and Dr. Chuan Xia (Harvard University) for helpful discussions.

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

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