Title

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

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.

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Link to publisher version (DOI)

http://dx.doi.org/10.1016/j.nanoen.2014.09.030