Large-scale synthesis of coaxial carbon nanotube/Ni(OH)2 composites for asymmetric supercapacitor application

Authors

Rahul R. Salunkhe, National Institute for Materials Science, Japan
Jianjian Lin, University of WollongongFollow
Victor Malgras, University of Wollongong, National Institute for Materials Science, JapanFollow
S X. Dou, University of WollongongFollow
Jung Ho Kim, University of WollongongFollow
Yusuke Yamauchi, National Institute For Materials Science, Waseda University

RIS ID

97002

Publication Details

Salunkhe, R. R., Lin, J., Malgras, V., Dou, S. Xue., Kim, J. & Yamauchi, Y. (2015). Large-scale synthesis of coaxial carbon nanotube/Ni(OH)₂ composites for asymmetric supercapacitor application. Nano Energy, 11 211-218.

Abstract

Coaxial carbon nanotube-nickel hydroxide (CNT/Ni(OH)₂) composites are prepared by a simple, one step and inexpensive chemical coprecipitation method. The coaxial coating of nickel hydroxide provides a three dimensional (3D) structure for easy access of electrolyte. Asymmetric supercapacitors (ASCs) are fabricated using coaxial CNT/Ni(OH)₂ composites as positive electrode and reduced graphene oxide (rGO) as negative electrode. The operation voltage is expanded to 1.8V in spite of the use of aqueous electrolyte, revealing a high energy density of 35W·h·kg^-1 at a power density of 1.8kW·kg^-1. This strategy for choice of coaxial metal hydroxide CNT composites provides a promising route for next generation supercapacitors with high energy as well as power densities.