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Two-dimensional V4C3MXene as high performance electrodematerials for supercapacitors

Journal Article


Abstract


  • Two-dimensional (2D) MXenes such as Ti 3 C 2 , Ti 2 C, Mo 2 C, and Mo 1.33 C have shown excellent electrochemical performances as supercapacitor electrodes, and the exploration of new and/or high-capacity MXene-based supercapacitor electrode materials is an active field. In this work, 2D multi-layered V 4 C 3 MXene has been synthesized by selectively etching Al from V 4 AlC 3 and it shows a high capacitance of 209 F g −1 at 2 mV s −1 , good rate performance, and stable long cyclic performance with capacitance retention rate of 97.23% after 10000 cycles at 10 A g −1 in 1 M H 2 SO 4 . Importantly, the pseudocapacitance (∼100.1 F g −1 ) accounts for about 37% of the total capacity (∼268.5 F g −1 ) for V 4 C 3 MXene electrode. Therefore, the high specific capacitance of V 4 C 3 MXene is not only due to their wide interlayer spacing (∼0.466 nm), large specific surface areas (∼31.35 m 2 g −1 ) and pore volumes (∼0.047 cm 3 g −1 ), and good hydrophilicity but also attributed to the abundant valence states of vanadium (+2, +3, and +4). The high rate performance and excellent cycling stability of V 4 C 3 MXene electrodes are mainly attributed to the high electronic conductivity (1137 S m −1 at 300 K). The present work provides another promising MXene-based supercapacitor electrode material.

Authors


  •   Wang, Xin (external author)
  •   Lin, Shuai (external author)
  •   Tong, Haiyun (external author)
  •   Huang, Yanan (external author)
  •   Tong, Peng (external author)
  •   Zhao, Bangchuan (external author)
  •   Dai, Jianming (external author)
  •   Liang, Changhao (external author)
  •   Wang, Hai (external author)
  •   Zhu, Xuebin (external author)
  •   Sun, Yuping (external author)
  •   Dou, Shi Xue

Publication Date


  • 2019

Citation


  • Wang, X., Lin, S., Tong, H., Huang, Y., Tong, P., Zhao, B., Dai, J., Liang, C., Wang, H., Zhu, X., Sun, Y. & Dou, S. (2019). Two-dimensional V4C3MXene as high performance electrodematerials for supercapacitors. Electrochimica Acta, 307 414-421.

Scopus Eid


  • 2-s2.0-85064214964

Number Of Pages


  • 7

Start Page


  • 414

End Page


  • 421

Volume


  • 307

Place Of Publication


  • United Kingdom

Abstract


  • Two-dimensional (2D) MXenes such as Ti 3 C 2 , Ti 2 C, Mo 2 C, and Mo 1.33 C have shown excellent electrochemical performances as supercapacitor electrodes, and the exploration of new and/or high-capacity MXene-based supercapacitor electrode materials is an active field. In this work, 2D multi-layered V 4 C 3 MXene has been synthesized by selectively etching Al from V 4 AlC 3 and it shows a high capacitance of 209 F g −1 at 2 mV s −1 , good rate performance, and stable long cyclic performance with capacitance retention rate of 97.23% after 10000 cycles at 10 A g −1 in 1 M H 2 SO 4 . Importantly, the pseudocapacitance (∼100.1 F g −1 ) accounts for about 37% of the total capacity (∼268.5 F g −1 ) for V 4 C 3 MXene electrode. Therefore, the high specific capacitance of V 4 C 3 MXene is not only due to their wide interlayer spacing (∼0.466 nm), large specific surface areas (∼31.35 m 2 g −1 ) and pore volumes (∼0.047 cm 3 g −1 ), and good hydrophilicity but also attributed to the abundant valence states of vanadium (+2, +3, and +4). The high rate performance and excellent cycling stability of V 4 C 3 MXene electrodes are mainly attributed to the high electronic conductivity (1137 S m −1 at 300 K). The present work provides another promising MXene-based supercapacitor electrode material.

Authors


  •   Wang, Xin (external author)
  •   Lin, Shuai (external author)
  •   Tong, Haiyun (external author)
  •   Huang, Yanan (external author)
  •   Tong, Peng (external author)
  •   Zhao, Bangchuan (external author)
  •   Dai, Jianming (external author)
  •   Liang, Changhao (external author)
  •   Wang, Hai (external author)
  •   Zhu, Xuebin (external author)
  •   Sun, Yuping (external author)
  •   Dou, Shi Xue

Publication Date


  • 2019

Citation


  • Wang, X., Lin, S., Tong, H., Huang, Y., Tong, P., Zhao, B., Dai, J., Liang, C., Wang, H., Zhu, X., Sun, Y. & Dou, S. (2019). Two-dimensional V4C3MXene as high performance electrodematerials for supercapacitors. Electrochimica Acta, 307 414-421.

Scopus Eid


  • 2-s2.0-85064214964

Number Of Pages


  • 7

Start Page


  • 414

End Page


  • 421

Volume


  • 307

Place Of Publication


  • United Kingdom