Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Supercapacitive Properties of Co-Ni Mixed Oxide Electrode Adopting the Nickel Foam as a Current Collector

  • Cho, Hyeon Woo (Department of Applied Chemistry and Biotechnology, Hanbat National University) ;
  • Nam, Ji Hyun (Department of Applied Chemistry and Biotechnology, Hanbat National University) ;
  • Park, Jeong Ho (Department of Applied Chemistry and Biotechnology, Hanbat National University) ;
  • Kim, Kwang Man (Research Team of Power Control Devices, Electronics and Telecommunication Research Institute) ;
  • Ko, Jang Myoun (Department of Applied Chemistry and Biotechnology, Hanbat National University)
  • Received : 2012.08.27
  • Accepted : 2012.09.07
  • Published : 2012.12.20
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Abstract

Three-dimensional porous nickel foam was used as a current collector to prepare a Co-Ni oxide/Ni foam electrode for a supercapacitor. The synthesized Co-Ni oxide was proven to consist of mixed oxide phases of $Co_3O_4$ and NiO. The Co-Ni oxide/Ni foam electrode prepared was characterized by morphological observation, crystalline property analysis, cyclic voltammetry, and impedance spectroscopy. Cyclic voltammetry for the electrode showed high specific capacitances, such as 936 F $g^{-1}$ at 5 mV $s^{-1}$ and 566 F $g^{-1}$ at 200 mV $s^{-1}$, and a comparatively good cycle performance. These improved results were mainly due to the dimensional stability of the nickel foam and its high electrical contact between the electrode material and the current collector substrate.

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