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Adv Mater. 2016 Aug;28(31):6719-26. doi: 10.1002/adma.201506157. Epub 2016 May 23.

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

Author information

1
Department of Chemistry and Biochemistry, California NanoSystems Institute, University of California, Los Angeles (UCLA), Los Angeles, CA, 90095, USA.
2
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai, 201620, China.
3
Department of Chemistry, Faculty of Science, Cairo University, Giza, 12613, Egypt.
4
Department of Materials Science and Engineering, UCLA, Los Angeles, CA, 90095, USA.

Abstract

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.

KEYWORDS:

3D microstructure; graphene; supercapacitors

PMID:
27214752
DOI:
10.1002/adma.201506157

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