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Hierarchical Cu2O/CuO/Co3O4 core-shell nanowires: synthesis and electrochemical properties.

Authors
Type
Published Article
Journal
Nanotechnology
1361-6528
Publisher
IOP Publishing
Publication Date
Volume
26
Issue
30
Pages
304002–304002
Identifiers
DOI: 10.1088/0957-4484/26/30/304002
PMID: 26150371
Source
Medline
License
Unknown

Abstract

We prepared hierarchical Cu2O/CuO/Co3O4 core-shell nanowires (NWs) via a facile chemical deposition method followed by calcination for use as the electrode of supercapacitors. The Cu2O/CuO/Co3O4 electrode showed a specific capacitance of 318 F g(-1) at a current density of 0.5 A g(-1). 80% of the original specific capacitance was retained after 3000 cycles at a current density of 5 A g(-1). An asymmetric supercapacitor cell using Cu2O/CuO/Co3O4 NWs as the positive electrode and activated graphene as the negative electrode exhibited a maximum energy density of 12 Wh kg(-1). The electrochemical properties of the electrode were strongly related to the hierarchical nanostructure, which not only provided rich active sites but also shortened ion transport pathways.

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