Excellent capacitive performance of three-dimensional hierarchical porous graphene/carbon composite with a superhigh surface area

Li, Xue Jin, Xing, Wei, Zhou, Jin, Wang, Gui Qiang, Zhuo, Shu Ping, Yan, Zi Feng, Xue, Qing Zhong and Qiao, Shi Zhang (2014) Excellent capacitive performance of three-dimensional hierarchical porous graphene/carbon composite with a superhigh surface area. Chemistry - A European Journal, 20 41: 13314-13320. doi:10.1002/chem.201402897


Author Li, Xue Jin
Xing, Wei
Zhou, Jin
Wang, Gui Qiang
Zhuo, Shu Ping
Yan, Zi Feng
Xue, Qing Zhong
Qiao, Shi Zhang
Title Excellent capacitive performance of three-dimensional hierarchical porous graphene/carbon composite with a superhigh surface area
Journal name Chemistry - A European Journal   Check publisher's open access policy
ISSN 0947-6539
1521-3765
Publication date 2014-10-06
Sub-type Article (original research)
DOI 10.1002/chem.201402897
Open Access Status Not Open Access
Volume 20
Issue 41
Start page 13314
End page 13320
Total pages 7
Place of publication Wiley - VCH Verlag
Publisher Weinheim, Germany
Language eng
Formatted abstract
Three-dimensional hierarchical porous graphene/carbon composite was successfully synthesized from a solution of graphene oxide and a phenolic resin by using a facile and efficient method. The morphology, structure, and surface property of the composite were investigated intensively by a variety of means such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), N2 adsorption, Raman spectroscopy, and Fourier transform infrared spectroscopy (FTIR). It is found that graphene serves as a scaffold to form a hierarchical pore texture in the composite, resulting in its superhigh surface area of 2034 m2g−1, thin macropore wall, and high conductivity (152 S m−1). As evidenced by electrochemical measurements in both EMImBF4 ionic liquid and KOH electrolyte, the composite exhibits ideal capacitive behavior, high capacitance, and excellent rate performance due to its unique structure. In EMImBF4, the composite has a high energy density of up to 50.1 Wh kg−1 and also possesses quite stable cycling stability at 100 °C, suggesting its promising application in high-temperature supercapacitors. In KOH electrolyte, the specific capacitance of this composite can reach up to an unprecedented value of 186.5 F g−1, even at a very high current density of 50 A g−1, suggesting its prosperous application in high-power applications.
Keyword Carbon
Conducting materials
Graphene
Supercapacitors
Surface chemistry
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

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