Jump to main content
Jump to site search

Issue 28, 2012
Previous Article Next Article

Chemically derived graphene–metal oxide hybrids as electrodes for electrochemical energy storage: pre-graphenization or post-graphenization?

Author affiliations

Abstract

The introduction of a secondary phase is an efficient and effective way to improve the electrochemical performance of graphene towards energy storage applications. Two fundamental strategies including pre-graphenization and post-graphenization were widely employed for graphene-based hybrids. However, there is still an open question of which way is better. In this contribution, we investigated the differences in the structure and electrochemical properties of pre- and post-graphenized graphene–SnO2 hybrids. The pre-graphenization is realized by synthesis of thermally reduced graphene and subsequent impregnation of SnO2, while the post-graphenization is realized by introducing a Sn-containing phase onto GO sheets followed by chemical reduction. The pre-graphenization process provides a large amount of pores for ion diffusion, which is of benefit for loading of SnO2, fast ion diffusion for supercapacitors, and higher capacity for Li-ion batteries, but poor stability, while the post-graphenization process offers compact graphene and good interaction between the SnO2 and graphene, which provides stable structure for long term stability for supercapacitor and Li-ion battery use.

Graphical abstract: Chemically derived graphene–metal oxide hybrids as electrodes for electrochemical energy storage: pre-graphenization or post-graphenization?

Back to tab navigation

Supplementary files

Article information


Submitted
21 Nov 2011
Accepted
09 May 2012
First published
12 Jun 2012

J. Mater. Chem., 2012,22, 13947-13955
Article type
Paper

Chemically derived graphene–metal oxide hybrids as electrodes for electrochemical energy storage: pre-graphenization or post-graphenization?

C. Chen, Q. Zhang, J. Huang, W. Zhang, X. Zhao, C. Huang, F. Wei, Y. Yang, M. Wang and D. S. Su, J. Mater. Chem., 2012, 22, 13947
DOI: 10.1039/C2JM16042K

Search articles by author

Spotlight

Advertisements