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Synthesis of High-Quality Two-Dimensional V 2 C MXene for Supercapacitor Application

Author

Listed:
  • Wangsheng Ai

    (Faculty of Maritime and Transportation, Ningbo University, Ningbo 315832, China)

  • Chunfei Zhang

    (Faculty of Maritime and Transportation, Ningbo University, Ningbo 315832, China)

  • Lan Xia

    (Faculty of Maritime and Transportation, Ningbo University, Ningbo 315832, China)

  • He Miao

    (Faculty of Maritime and Transportation, Ningbo University, Ningbo 315832, China)

  • Jinliang Yuan

    (Faculty of Maritime and Transportation, Ningbo University, Ningbo 315832, China)

Abstract

Two-dimensional (2D) V 2 C MXene has fascinating potential for use as electrodes in high-energy-density supercapacitors because of its excellent electrical conductivity and large specific surface area. However, it is not feasible to synthesize V 2 C by etching vanadium carbon aluminide (V 2 AlC) with hydrofluoric acid, which is commonly used for preparing other MXenes. In this work, a modified method is developed for synthesizing high-quality 2D V 2 C. A mixture of sodium fluoride (NaF) and hydrochloric acid (HCl) was used as the etching agent, where V 2 AlC can be gently etched by a hydrothermal reactor-assisted method. As electrode materials for supercapacitors, V 2 C shows the characteristics of electric double layer capacitance. The electrochemical results show high specific capacitance (223.5 F/g in 1 M Na 2 SO 4 at a current density of 100 mA/g) and good cycling stability (the capacitance retention rate can be maintained at 94.7% after 5000 cycles). This work provides a new method for the synthesis of high-quality V 2 C for application in related fields.

Suggested Citation

  • Wangsheng Ai & Chunfei Zhang & Lan Xia & He Miao & Jinliang Yuan, 2022. "Synthesis of High-Quality Two-Dimensional V 2 C MXene for Supercapacitor Application," Energies, MDPI, vol. 15(10), pages 1-12, May.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:10:p:3696-:d:818328
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