Open Conference Systems, International Conference on Electrochemical Energy and Technology

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Mesoporous TiO2/Graphene Composites via Photocatalytic Reduction Method for High Property Lithium-Ion Batteries
Xiaobing Wang, Fuyuan Liu, Lin Yang, Fei Tian, Xiangdong Lou, Kui Wang, Bibo Cai

Last modified: 2014-10-08

Abstract


The mesoporous TiO2/graphene composites were successfully fabricated through photocatalytic reduction method. The obtained samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, nitrogen adsorption/desorption analysis, field emission scanning electron microscopy, etc. It was found that the average grain size of the TiO2 nanocrystals samples were about 5 nm, and the BET specific surface area and pore volume of the sample are 282.2 m2 g-1 and 0.29 cm3 g-1, respectively. As the anode materials for the lithium ion batteries, the mesoporous TiO2/graphene composites exhibited a high initial discharge capacity of 293.7 mA h g-1 at the current density 100 mAg-1 and retain 217 mA h g-1 even after 70 cycles, The initial discharge capacities were 183 mA h g-1,133 mA h g-1, 111 mA h g-1 and 48.6 mA h g-1 mAg-1 at the current density 200 mA g-1, 500 mA g-1, 1000 mA g-1, 5000 mA g-1, respectively. The results indicated that the mesoporous TiO2/graphene composites had excellent electrochemical performance. These excellent electrochemical performances could be attributed to the graphene prevent the TiO2 together, the high surface area and the high electrical conductivity.

References


1. B. Qiu, M. Xing, J. Zhang, J. Am. Chem. Soc, 2014, 10.1021/ja500873u.

2. X. Wang, Y. Wang, L. Yang, K. Wang, X. Lou, B. Cai, J. Power Sources 2014, 262, 72-78.

3. S. J. R. Prabakar, Y.-H. Hwang, E.-G. Bae, S. Shim, D. Kim, M. S. Lah, K.-S. Sohn, M. Pyo, Adv. Mater. 2013, 25, 3307–3312.


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