Effects of Graphene on Electrochemical Behaviors of Ni(OH)2 as Supercapacitor Material

Authors

Zhen-zhen ZHAO
Wen-bin NI
Neng-yue GAO
Hong-bo WANG
Jian-wei ZHAOFollow

Corresponding Author

Jian-wei ZHAO(jwzhao@zjxu.edu.cn)

Abstract

The enhanced electrochemical properties of Ni(OH)2 by the oxidation defected graphene were studied by both experimental method and theoretical calculation. The composite material of nano-Ni(OH)2/graphene was prepared by potentiostatic deposition on the graphene substrate. Observed by TEM, the Ni(OH)2 nanoparticles were well dispersed on the graphene substrate with the diameter of 5.0±0.5 nm. The capacitance of the system measured by the electrochemical test was 1928 F?g-1. As indicated by the theoretical calculations, the composite material becomes conductive since Ni(OH)2 is combined with surface functional groups of the graphene through the strong chemical interaction. The electrons transfer from the graphene substrate to the Ni(OH)2 through the oxidation defects, which makes the Ni(OH)2 nanoparticles negatively charged and results in the unilateral conduction phenomenon.

Graphical Abstract

Keywords

graphene, Ni(OH)2 nanoparticle, electrochemical deposition, supercapacitor

DOI Link

https://doi.org/10.61558/2993-074X.2843

Publication Date

2011-08-28

Online Available Date

2011-06-09

Revised Date

2011-05-24

Received Date

2011-04-18

Recommended Citation

Zhen-zhen ZHAO, Wen-bin NI, Neng-yue GAO, Hong-bo WANG, Jian-wei ZHAO. Effects of Graphene on Electrochemical Behaviors of Ni(OH)2 as Supercapacitor Material[J]. Journal of Electrochemistry, 2011 , 17(3): Article 10.
DOI: 10.61558/2993-074X.2843
Available at: https://jelectrochem.xmu.edu.cn/journal/vol17/iss3/10