Journal of Electrochemical Science and Technology

The Korean Electrochemical Society (한국전기화학회)
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Remarkable Stability of Graphene/Ni-Al Layered Double Hydroxide Hybrid Composites for Electrochemical Capacitor Electrodes

  • Lee, Jeong Woo (Department of Chemical and Biomolecular Engineering, Center for Energy and Environment Engineering, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • In, Su-Il (Department of Energy Systems Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST)) ;
  • Kim, Jong-Duk (Department of Chemical and Biomolecular Engineering, Center for Energy and Environment Engineering, Korea Advanced Institute of Science and Technology (KAIST))
  • Received : 2013.03.04
  • Accepted : 2013.03.24
  • Published : 2013.03.30
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Abstract

Graphene/Ni-Al layered double hydroxide (LDH) hybrid materials were synthesized by a hydrothermal reaction. Hexagonal Ni-Al LDH particles nucleated and grew on graphene sheets, thus preventing restacking of the graphene sheets and aggregation of the Ni-Al LDH nanoparticles upon drying. Electrode made from the graphene/Ni-Al LDH hybrid materials showed a substantial improvement in electrochemical capacitance relative to those made with pure Ni-Al LDH nanoparticles. In addition, the graphene/Ni-Al LDH hybrid composite materials showed remarkable stability after 4000 cycles with over 100% capacitance retention. These materials are thus very promising for use in electrochemical capacitor electrodes.

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