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Journal of Sol-Gel Science and Technology
Published in: Journal of Sol-Gel Science and Technology 3/2019

19-01-2019 | Original Paper: Nano-structured materials (particles, fibers, colloids, composites, etc.)

Co3O4 nanocrystals grown on graphene nanosheets for high-performance supercapacitor with excellent rate capability

Authors: Yunhui Qi, Rui Zhu, Jun Xie, Yali Luo, Yunfei Liu, Yinong Lyu

Published in: Journal of Sol-Gel Science and Technology | Issue 3/2019

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Abstract

Co3O4 nanocrystals grown on graphene nanosheets (GNSs) were synthesized through a facile microwave hydrothermal method. The morphological and crystalline changes of Co3O4 nanocrystals during the microwave hydrothermal treatment are characterized by FE-SEM and XRD. Different morphologies of Co3O4/GNSs are obtained by controlling the microwave hydrothermal temperatures and time. The particle-slice Co3O4/GNSs exhibits the specific capacitance of 736 F g−1 at a current density of 9 A g−1 and 659 F g−1 at a high current density of 32 A g−1 (~97% capacitance retention at 4.5 A g−1 and ~89% capacitance retention at 9 A g−1). Therefore, the anode material with high rate capability and excellent cycle stability could be promising for high-performance supercapacitor.
previous article Multifunctional C/SiO2/SiC-based aerogels and composites for thermal insulators and electromagnetic interference shielding
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Metadata
Title
Co3O4 nanocrystals grown on graphene nanosheets for high-performance supercapacitor with excellent rate capability
Authors
Yunhui Qi
Rui Zhu
Jun Xie
Yali Luo
Yunfei Liu
Yinong Lyu
Publication date
19-01-2019
Publisher
Springer US
Published in
Journal of Sol-Gel Science and Technology / Issue 3/2019
Print ISSN: 0928-0707
Electronic ISSN: 1573-4846
DOI
https://doi.org/10.1007/s10971-019-04921-8

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