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Issue 14, 2016
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Porous cubes constructed by cobalt oxide nanocrystals with graphene sheet coatings for enhanced lithium storage properties

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Abstract

In this manuscript, graphene-encapsulated porous cobalt oxide cubes (Co3O4@G) are fabricated through a facile precipitation reaction with subsequent calcination and a self-assembly process. The synthesized porous Co3O4 cubes anchored in the conductive graphene network can realize superior electrical conductivity, withstand volume variation upon prolonged cycling and shorten the diffusion path of lithium ions. When evaluated as anode materials, the Co3O4@G electrode shows excellent electrochemical properties in terms of both stable cycling performance and good rate capabilities. For example, a reversible discharge capacity of 980 mA h gāˆ’1 is delivered after 80 cycles at a current density of 200 mA gāˆ’1. Introducing a conductive graphene network to modify other metal oxides with poor electric conductivity and large volume excursions is of great interest in the development of lithium ion battery technologies.

Graphical abstract: Porous cubes constructed by cobalt oxide nanocrystals with graphene sheet coatings for enhanced lithium storage properties

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Supplementary files

Article information


Submitted
04 Feb 2016
Accepted
05 Mar 2016
First published
07 Mar 2016

Nanoscale, 2016,8, 7688-7694
Article type
Paper

Porous cubes constructed by cobalt oxide nanocrystals with graphene sheet coatings for enhanced lithium storage properties

H. Geng, Y. Guo, X. Ding, H. Wang, Y. Zhang, X. Wu, J. Jiang, J. Zheng, Y. Yang and H. Gu, Nanoscale, 2016, 8, 7688
DOI: 10.1039/C6NR01024E

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