NDLI: Co(OH)$_{2}$ nanoflakes grown on 3D graphene foam as a binder-free hybrid electrode for high-performance supercapacitors

Content Provider	Springer Nature Link
Author	Yin, Tong Zhang, Wenkang Yin, Yaolong Yan, Ya Zhan, Ke Yang, Junhe Zhao, Bin
Copyright Year	2017
Abstract	Using a simple hydrothermal method, porous Co(OH)$_{2}$ nanoflakes were successfully deposited on 3D graphene foam grown by chemical vapor deposition. And the Co(OH)$_{2}$/3D graphene hybrids were then employed as the binder-free electrode for supercapacitors. Structure and morphology of the hybrid materials were investigated and effect of hydrothermal temperature on electrochemical performance was optimized. The 90 °C-synthesized sample exhibits the highest specific capacitance of 1636 F/g at 0.5 A/g in the KOH electrolyte. Even as the current density increases 120 times to 60 A/g, the specific capacitance of 1180 F/g is still maintained, representing the excellent rate capability. The hybrid electrode also shows good cycling stability with capacity retention of 75% after 1000 cycles. The excellent electrochemical performance of the hybrid electrode is attributed to synergistic effect of the highly conductive graphene and the nano-porous Co(OH)$_{2}$.
Starting Page	7884
Ending Page	7891
Page Count	8
File Format	PDF
ISSN	09574522
Journal	Journal of Materials Science: Materials in Electronics
Volume Number	28
Issue Number	11
e-ISSN	1573482X
Language	English
Publisher	Springer US
Publisher Date	2017-02-09
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Optical and Electronic Materials Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Biomaterials Biophysics Condensed Matter Physics Electronic, Optical and Magnetic Materials Bioengineering Electrical and Electronic Engineering Biomedical Engineering

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