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Issue 5, 2016

Flattening sol–gel nanospheres into a carbon sheet-intercalated cobalt/carbon/cobalt sandwich-nanostructure

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Abstract

It is known that carbon layer intercalation can reduce and even avoid the breakdown of matrix material induced by expansion in hydrogen storage processes. Herein, we provide a general strategy to synthesize a uniform cobalt/carbon/cobalt sandwich-like nanosheet stack (denoted as Co/C/Co), which is difficult to achieve using conventional one-pot synthetic methods. In this strategy, sol–gel nanospheres covered with cobaltII–cobaltIII layered double hydroxide (CoII–CoIII–LDH) were firstly constructed and used as a precursor. After a simple post-treatment the sandwich-nanostructures were successfully obtained, which display an extra high capacity, excellent high-rate capability, and long cycle life. Distinct from the most common structures of carbon-based composites (mixed, wrapped, or anchored models), the resultant materials display a uniform sandwich-like configuration: few-layer carbon sheets conformably intercalate cobalt nanoparticles. This facile strategy can be easily extended to design other metal/carbon/metal sandwich-like nanomaterials.

Graphical abstract: Flattening sol–gel nanospheres into a carbon sheet-intercalated cobalt/carbon/cobalt sandwich-nanostructure

Supplementary files

Article information


Submitted
26 Oct 2015
Accepted
01 Feb 2016
First published
03 Feb 2016

Inorg. Chem. Front., 2016,3, 645-650
Article type
Research Article
Author version available

Flattening sol–gel nanospheres into a carbon sheet-intercalated cobalt/carbon/cobalt sandwich-nanostructure

P. Gao, Y. Yang, D. Bao, Y. Chen, Y. Wang, P. Yang and X. Zhang, Inorg. Chem. Front., 2016, 3, 645 DOI: 10.1039/C5QI00215J

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