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

Chen, C., Zhang, Q., Huang, J.-Q., Zhang, W., Zhao, X.-C., Huang, C.-H., et al. (2012). Chemically derived graphene-metal oxide hybrids as electrodes for electrochemical energy storage: pre-graphenization or post-graphenization? Journal of Materials Chemistry, 22(28), 13947-13955. doi:10.1039/C2JM16042K.

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 Creators:
Chen, Chenmeng1, 2, Author           
Zhang, Qiang2, 3, Author           
Huang, Jia-Qi3, Author
Zhang, Wei2, Author           
Zhao, Xiao-Chen2, 4, Author           
Huang, Chun-Hsien2, 5, Author           
Wei, Fei3, Author
Yang, Yong-Gang1, Author
Wang, Mao-Zhang1, Author
Su, Dang Sheng6, Author
Affiliations:
1Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, 27 Taoyuan South Road, Taiyuan 030001, China, ou_persistent22              
2Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
3Beijing Key Laboratory of Green Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China, ou_persistent22              
4State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Science, PO Box 110, Dalian 116023, China, ou_persistent22              
5Department of Biomedical Engineering and Environmental Sciences, National Tsing-Hua University, Hsinchu 30013, Taiwan, ou_persistent22              
6Shenyang National Laboratory for Materials Science Institute of Metal Research, Chinese Academy of Science, ou_persistent22              

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 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.

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Language(s): eng - English
 Dates: 2011-11-212012-05-092012-06-122012
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1039/C2JM16042K
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Title: Journal of Materials Chemistry
Source Genre: Journal
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Publ. Info: Cambridge, UK : Royal Society of Chemistry
Pages: - Volume / Issue: 22 (28) Sequence Number: - Start / End Page: 13947 - 13955 Identifier: ISSN: 0959-9428
CoNE: https://pure.mpg.de/cone/journals/resource/954925273429