The effect of graphene coated nickel foam on the microstructures of NiO and their supercapacitor performance

Lv Jinlong, Zhuqing Wang, Liang Tongxiang, Yang Meng, Ken Suzuki, Hideo Miura

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Cotton-like NiO is formed on the surface of bare Ni foam after hydrothermal process and calcination process, while ultrathin NiO nanoflakes occur on Ni foam coated with graphene. The high specific capacitance of 1782 F g− 1 at 1 A g− 1 and 90.2% capacity retention at 1 A g− 1 after 5000 cycles charge-discharge test are found. The graphene induces the high electrical conductivity and excellent interfacial contact, in addition, the graphene facilitates the forming of ultrathin NiO nanoflakes which result in huge pseudocapacitance due to large surface area and abundant mesoporous. The unique microstructure characteristic promotes interfacial electron transport in the electrode material and improves ion diffusion during the electrochemical reaction process.

Original languageEnglish
Pages (from-to)595-601
Number of pages7
JournalJournal of Electroanalytical Chemistry
Volume799
DOIs
Publication statusPublished - 2017 Aug 15

Keywords

  • Electrochemical reaction
  • Graphene
  • NiO
  • Supercapacitor
  • Surface area

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

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