17August2017

Nano-Micro Letters

Preparation of Sandwich-like NiCo2O4/rGO/NiO Heterostructure on Nickel Foam for High Performance Supercapacitor Electrodes

Delong Li1,2, Youning Gong1,2, Miaosheng Wang1,3, Chunxu Pan1,2,*

Abstract
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Nano-Micro Lett. (2017) 9: 16

Published Online: 28 November 2016 (Article)

DOI: 10.1007/s40820-016-0117-1

 

Abstract

 


abstract

A kind of sandwich-like NiCo2O4/rGO/NiO heterostructure composite have been successfully anchored on nickel foam (NF) substrate via a three-step hydrothermal method with successive annealing treatment. The smart combination of NiCo2O4, reduced graphene oxide (rGO) and NiO nanostructure in the sandwich-like nano architecture shows a promising synergistic effect for supercapacitors with greatly enhanced electrochemical performance. For serving as supercapacitor electrode, the NiCo2O4/rGO/NiO heterostructure materials exhibit remarkable specific capacitance of 2644 mFcm-2 at current density of 1 mA cm-2, and excellent capacitance retentions of 97.5% after 3000 cycles. It is expected that the present heterostructure will be promising electrode materials for high performance supercapacitors.


 

Keywords

NiCo2O4; Reduced graphene oxide (rGO); NiO; Heterostructure; Supercapacitors

 

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