3D nanoporous graphene films converted from liquid-crystalline holey graphene oxide for thin and high-performance supercapacitors

Bin Wang; Jinzhang Liu; Yi Zhao; Dezhi Zheng; Yan Li; Jiangbo Sha

doi:10.1088/2053-1591/aaa098

3D nanoporous graphene films converted from liquid-crystalline holey graphene oxide for thin and high-performance supercapacitors

Bin Wang, Jinzhang Liu, Yi Zhao, Dezhi Zheng, Yan Li, Jiangbo Sha

Beihang University

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Holey graphene oxide (HGO) is prepared and its liquid crystal (LC) formation in water is investigated. The blade-coated LC-HGO hydrogel is hydrothermally reduced to form 3D nanoporous films used as supercapacitor electrodes. Holey graphene sheets are rumpled and interconnected to form a cellular structure with pore size around 100 nm during the reduction process. Reduced HGO films with different thicknesses are integrated into solid-state symmetric supercapacitors and their electrochemical performances are studied. High specific capacitance up to 304 F g^-1 and high volumetric capacitance around 400 F cm^-3 are achieved from our thin and flexible devices.

Original language	English
Article number	015503
Journal	Materials Research Express
Volume	5
Issue number	1
DOIs	https://doi.org/10.1088/2053-1591/aaa098
Publication status	Published - Jan 2018
Externally published	Yes

Keywords

blade coating
energy storage
holey graphene
liquid crystal
nanoporous graphene films
supercapacitor

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10.1088/2053-1591/aaa098

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Wang, B., Liu, J., Zhao, Y., Zheng, D., Li, Y., & Sha, J. (2018). 3D nanoporous graphene films converted from liquid-crystalline holey graphene oxide for thin and high-performance supercapacitors. Materials Research Express, 5(1), Article 015503. https://doi.org/10.1088/2053-1591/aaa098

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abstract = "Holey graphene oxide (HGO) is prepared and its liquid crystal (LC) formation in water is investigated. The blade-coated LC-HGO hydrogel is hydrothermally reduced to form 3D nanoporous films used as supercapacitor electrodes. Holey graphene sheets are rumpled and interconnected to form a cellular structure with pore size around 100 nm during the reduction process. Reduced HGO films with different thicknesses are integrated into solid-state symmetric supercapacitors and their electrochemical performances are studied. High specific capacitance up to 304 F g-1 and high volumetric capacitance around 400 F cm-3 are achieved from our thin and flexible devices.",

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author = "Bin Wang and Jinzhang Liu and Yi Zhao and Dezhi Zheng and Yan Li and Jiangbo Sha",

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AU - Zhao, Yi

AU - Zheng, Dezhi

AU - Li, Yan

AU - Sha, Jiangbo

PY - 2018/1

Y1 - 2018/1

N2 - Holey graphene oxide (HGO) is prepared and its liquid crystal (LC) formation in water is investigated. The blade-coated LC-HGO hydrogel is hydrothermally reduced to form 3D nanoporous films used as supercapacitor electrodes. Holey graphene sheets are rumpled and interconnected to form a cellular structure with pore size around 100 nm during the reduction process. Reduced HGO films with different thicknesses are integrated into solid-state symmetric supercapacitors and their electrochemical performances are studied. High specific capacitance up to 304 F g-1 and high volumetric capacitance around 400 F cm-3 are achieved from our thin and flexible devices.

AB - Holey graphene oxide (HGO) is prepared and its liquid crystal (LC) formation in water is investigated. The blade-coated LC-HGO hydrogel is hydrothermally reduced to form 3D nanoporous films used as supercapacitor electrodes. Holey graphene sheets are rumpled and interconnected to form a cellular structure with pore size around 100 nm during the reduction process. Reduced HGO films with different thicknesses are integrated into solid-state symmetric supercapacitors and their electrochemical performances are studied. High specific capacitance up to 304 F g-1 and high volumetric capacitance around 400 F cm-3 are achieved from our thin and flexible devices.

KW - blade coating

KW - energy storage

KW - holey graphene

KW - liquid crystal

KW - nanoporous graphene films

KW - supercapacitor

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3D nanoporous graphene films converted from liquid-crystalline holey graphene oxide for thin and high-performance supercapacitors

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