The electrocapacitive properties of hierarchical porous reduced graphene oxide templated by hydrophobic CaCO3 spheres

Gu, Yi, Wu, Hao, Xiong, Zhigang, Al Abdulla, Wael and Zhao, X. S. (2014) The electrocapacitive properties of hierarchical porous reduced graphene oxide templated by hydrophobic CaCO3 spheres. Journal of Materials Chemistry A, 2 2: 451-459. doi:10.1039/c3ta13105j


Author Gu, Yi
Wu, Hao
Xiong, Zhigang
Al Abdulla, Wael
Zhao, X. S.
Title The electrocapacitive properties of hierarchical porous reduced graphene oxide templated by hydrophobic CaCO3 spheres
Formatted title
The electrocapacitive properties of hierarchical porous reduced graphene oxide templated by hydrophobic CaCO3 spheres
Journal name Journal of Materials Chemistry A   Check publisher's open access policy
ISSN 2050-7488
2050-7496
Publication date 2014-01-14
Year available 2013
Sub-type Article (original research)
DOI 10.1039/c3ta13105j
Open Access Status Not Open Access
Volume 2
Issue 2
Start page 451
End page 459
Total pages 9
Place of publication Cambridge, United Kingdom
Publisher RSC
Language eng
Formatted abstract
The hard template approach for preparing porous materials allows one to be able to control pore size and particle morphology. However, the cost of this method is a crucial factor for mass production. In this work, commercially available low-cost hydrophobic CaCO3 spheres (HCS) of different particle sizes were used as hard templates for preparing porous reduced graphene oxide (RGO). Nitrogen physisorption, field-emission scanning electron microscopy and transmission electron microscopy images, and the electrochemical impedance spectroscopy technique revealed that the HCS acted as a template to generate hierarchical pores in the resultant RGO. A porous RGO sample with a specific surface area of 540 m2 g-1 templated by HCS with an average diameter of about 50 nm exhibited a gravimetric charge-discharge capacitance of 201 F g-1 at a current density of 0.1 A g-1. After 1000 continuous cycles, the electrode retained about 98.4% of its initial capacitance. This HCS template method provides a viable and inexpensive route to mass production of graphene-based porous materials for electrochemical energy storage.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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