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Journal of Materials Engineering and Performance
Erschienen in: Journal of Materials Engineering and Performance 9/2016

28.06.2016

Preparation of Shape-Controlled Graphene/Co3O4 Composites for Supercapacitors

verfasst von: Jun Chen, Ningna Chen, Xiaomiao Feng, Wenhua Hou

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 9/2016

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Abstract

Graphene/Co3O4 nanocomposites with different morphologies were fabricated by hydrothermal method. The morphology of nanocomposites was characterized by scanning electron microscopy. These composites could be used as the electrode materials for supercapacitors. The eletrochemical behavior of the composite was tested by cyclic voltammetry and galvanostatic charge-discharge measurements in 1.0 mol/L KOH solution. The results showed that the graphene/Co3O4 nanopetal composite exhibited excellent electrochemical performance. The specific capacitance value could reach up to 714 F/g at a scan rate of 2 mV/s. Besides, the capacitance of the graphene/Co3O4 nanopetal composite was 841 F/g at a current density of 0.1 A/g. After galvanostatic charge-discharge 1000 laps at the current density of 0.4 A/g, the specific capacitance could keep 96.7% of original capacitive value, demonstrating its good cycling stability.

Graphical Abstract

Vorheriger Artikel Study of the Peculiarities of the Zn-Mn Phase Diagram and Their Effect on the Superplastic Behavior of Fine-Grained Zn-Mn Alloys
Nächster Artikel Improving the Adhesion Resistance of the Boride Coatings to AISI 316L Steel Substrate by Diffusion Annealing

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Metadaten
Titel
Preparation of Shape-Controlled Graphene/Co3O4 Composites for Supercapacitors
verfasst von
Jun Chen
Ningna Chen
Xiaomiao Feng
Wenhua Hou
Publikationsdatum
28.06.2016
Verlag
Springer US
Erschienen in
Journal of Materials Engineering and Performance / Ausgabe 9/2016
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-016-2192-3

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