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Research Article | Open Access

Synthesis and electrochemical properties of V2C MXene by etching in opened/closed environments

Meng WUYan HELibo WANGQixun XIA ( )Aiguo ZHOU( )
Henan Key Laboratory of Materials on Deep-Earth Engineering, School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China
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Abstract

The effect of etching environment (opened or closed) on the synthesis and electrochemical properties of V2C MXene was studied. V2C MXene samples were synthesized by selectively etching of V2AlC at 90 ℃ in two different environments: opened environment (OE) in oil bath pans under atmosphere pressure and closed environment (CE) in hydrothermal reaction kettles under higher pressures. In OE, only NaF (sodium fluoride) + HCl (hydrochloric acid) etching solution can be used to synthesize highly pure V2C MXene. However, in CE, both LiF (lithium fluoride) + HCl and NaF+HCl etchant can be used to prepare V2C MXene. Moreover, the V2C MXene samples made in CE had higher purity and better-layered structure than those made in OE. Although the purity of V2C obtained by LiF+HCl is lower than that of V2C obtained using NaF+HCl, it shows better electrochemical performance as anodes of lithium-ion batteries (LIBs). Therefore, etching in CE is a better method for preparing highly pure V2C MXene, which provides a reference for expanding the synthesis methods of V2C with better electrochemical properties.

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Journal of Advanced Ceramics
Pages 749-758
Cite this article:
WU M, HE Y, WANG L, et al. Synthesis and electrochemical properties of V2C MXene by etching in opened/closed environments. Journal of Advanced Ceramics, 2020, 9(6): 749-758. https://doi.org/10.1007/s40145-020-0411-8

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Received: 09 May 2020
Revised: 12 August 2020
Accepted: 13 August 2020
Published: 15 November 2020
© The Author(s) 2020

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