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

被引:42
作者
Chen, Cheng-Meng [1 ,2 ]
Zhang, Qiang [1 ,3 ]
Huang, Jia-Qi [3 ]
Zhang, Wei [1 ]
Zhao, Xiao-Chen [1 ,6 ]
Huang, Chun-Hsien [1 ,5 ]
Wei, Fei [3 ]
Yang, Yong-Gang [2 ]
Wang, Mao-Zhang [2 ]
Su, Dang Sheng [1 ,4 ]
机构
[1] Max Planck Gesell, Fritz Haber Inst, Dept Inorgan Chem, D-14195 Berlin, Germany
[2] Chinese Acad Sci, Inst Coal Chem, Key Lab Carbon Mat, Taiyuan 030001, Peoples R China
[3] Tsinghua Univ, Dept Chem Engn, Beijing Key Lab Green React Engn & Technol, Beijing 100084, Peoples R China
[4] Chinese Acad Sci, Catalysis & Mat Div, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
[5] Natl Tsing Hua Univ, Dept Biomed Engn & Environm Sci, Hsinchu 30013, Taiwan
[6] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
关键词
PERFORMANCE ANODE MATERIALS; SNO2/GRAPHENE COMPOSITE; CARBON MATERIALS; MASS-PRODUCTION; LITHIUM; FABRICATION; GRAPHITE;
D O I
10.1039/c2jm16042k
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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.
引用
收藏
页码:13947 / 13955
页数:9
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