2D/2D heterostructures of nickel molybdate and MXene with strong coupled synergistic effect towards enhanced supercapacitor performance

Yining Wang, Jingwen Sun, Xingyue Qian, Yue Zhang, Lei Yu, Richao Niu, Hongan Zhao, Junwu Zhu

Research output: Contribution to journalArticlepeer-review

76 Scopus citations

Abstract

Nickel molybdate is emerged as a promising electrode material in supercapacitors for its rich redox chemistry. However, its limited electrical and ionic conductivities keep it from achieving its full capacitance potential. Here, a facile pathway is reported to synthesize NiMoO4/Ti3C2Tx nanosheets with interconnected porous construction, which may promote the electrolyte ion diffusion during reversible insertion/deinsertion processes, further improve its capacity. The fabricated NiMoO4/Ti3C2Tx electrode exhibits a high specific capacity of 545.5 C g−1 (1364 F g−1) at a current density of 0.5 A g−1 alongside with attractive cycling stability, contributed to the strong synergistic effects between NiMoO4 and Ti3C2Tx. Furthermore, an asymmetric supercapacitor is fabricated by coupling NiMoO4/Ti3C2Tx positive electrode with reduced graphene oxide hydrogel negative electrode, which demonstrates a broad potential window of 1.6 V, and an energy density of 33.76 W h kg−1.

Original languageEnglish
Pages (from-to)540-546
Number of pages7
JournalJournal of Power Sources
Volume414
DOIs
StatePublished - 28 Feb 2019
Externally publishedYes

Keywords

  • 2D/2D heterostructure
  • Energy storage devices
  • MXenes
  • Nickel molybdate

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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