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Vol. 9 No. 2 (2017)

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

https://doi.org/10.1007/s40820-016-0117-1
Delong Li
Shenzhen Research Institute, Wuhan University, Shenzhen 518057, People’s Republic of China
Youning Gong
Shenzhen Research Institute, Wuhan University, Shenzhen 518057, People’s Republic of China
Miaosheng Wang
Shenzhen Research Institute, Wuhan University, Shenzhen 518057, People’s Republic of China
Chunxu Pan
Shenzhen Research Institute, Wuhan University, Shenzhen 518057, People’s Republic of China

Corresponding Author: Chunxu Pan

cxpan@whu.edu.cn

Nano-Micro Letters, Vol. 9 No. 2 (2017), Article Number: 16

Abstract

A kind of sandwich-like NiCo2O4/rGO/NiO heterostructure composite has been successfully anchored on nickel foam 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 mF cm−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 a promising electrode material for high-performance supercapacitors.


Highlights:


1 A new sandwich-like NiCo2O4/rGO/NiO heterostructure is prepared by using a facile process via a three-step hydrothermal method.
2 This sandwich-like heterostructure exhibits a specific capacitance up to 2644 mF cm−2 and shows enhanced electrochemical performance.

Keywords

NiCo2O4 Reduced graphene oxide (rGO) NiO Heterostructure Supercapacitors
Li, Delong, Youning Gong, Miaosheng Wang, and Chunxu Pan. 2016. “Preparation of Sandwich-Like NiCo2O4/RGO/NiO Heterostructure on Nickel Foam for High-Performance Supercapacitor Electrodes”. Nano-Micro Letters 9 (2):16. https://doi.org/10.1007/s40820-016-0117-1.
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