3D Freeze-Casting of Cellular Graphene Films for Ultrahigh-Power-Density Supercapacitors

3D cellular graphene films with open porosity, high electrical conductivity, and good tensile strength, can be synthesized by a method combining freeze‐casting and filtration. The resulting supercapacitors based on 3D porous reduced graphene oxide (RGO) film exhibit extremely high specific power den...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2016-08, Vol.28 (31), p.6719-6726
Main Authors: Shao, Yuanlong, El-Kady, Maher F., Lin, Cheng-Wei, Zhu, Guanzhou, Marsh, Kristofer L., Hwang, Jee Youn, Zhang, Qinghong, Li, Yaogang, Wang, Hongzhi, Kaner, Richard B.
Format: Article
Language:English
Subjects:
3D microstructure
Electrical resistivity
Electronics
Extreme values
Graphene
Oxides
Porosity
Supercapacitors
Tensile strength
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Summary:3D cellular graphene films with open porosity, high electrical conductivity, and good tensile strength, can be synthesized by a method combining freeze‐casting and filtration. The resulting supercapacitors based on 3D porous reduced graphene oxide (RGO) film exhibit extremely high specific power densities and high energy densities. The fabrication process provides an effective means for controlling the pore size, electronic conductivity, and loading mass of the electrode materials, toward devices with high energy‐storage performance.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201506157