Hybrid hydrogels of porous graphene and nickel hydroxide as advanced supercapacitor materials

Chen, Sheng, Duan, Jingjing, Tang, Yonghong and Qiao, Shi Zhang (2013) Hybrid hydrogels of porous graphene and nickel hydroxide as advanced supercapacitor materials. Chemistry: A European Journal, 19 22: 7118-7124. doi:10.1002/chem.201300157


Author Chen, Sheng
Duan, Jingjing
Tang, Yonghong
Qiao, Shi Zhang
Title Hybrid hydrogels of porous graphene and nickel hydroxide as advanced supercapacitor materials
Journal name Chemistry: A European Journal   Check publisher's open access policy
ISSN 0947-6539
1521-3765
Publication date 2013-05-27
Sub-type Article (original research)
DOI 10.1002/chem.201300157
Volume 19
Issue 22
Start page 7118
End page 7124
Total pages 7
Place of publication Weinheim, Germany
Publisher Wiley
Language eng
Formatted abstract
Graphene-based hydrogels can be used as supercapacitor electrodes because of their excellent conductivity, their large surface area and their high compatibility with electrolytes. Nevertheless, the large aspect ratio of graphene sheets limits the kinetics of processes occurring in the electrode of supercapacitors. In this study, we have introduced in-plane and out-of-plane pores into a graphene-nickel hydroxide (Ni(OH)2) hybrid hydrogel, which facilitates charge and ion transport in the electrode. Due to its optimised chemistry and architecture, the hybrid electrode demonstrates excellent electrochemical properties with a combination of high charge storage capacitance, fast rate capability and stable cycling performance. Remarkably, the Ni(OH)2 in the hybrid contributes a capacitance as high as 3138.5F g-1, which is comparable to its theoretical capacitance, suggesting that such structure facilitates effectively charge-transfer reactions in electrodes. This work provides a facile pathway for tailoring the porosity of graphene-based materials for improved performances. Moreover, this work has also furthered our understanding in the effect of pore and hydrogel structures on the electrochemical properties of materials. 
Keyword Electrochemistry
Graphene
Mesoporous materials
Nanostructures
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
 
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