Journal of Fundamentals of Renewable Energy and Applications
Open Access

Improvement of electrochemical performance of SiO2/C nanocomposites as anode for lithium ion batteries through high temperature heat treatment

3^rd International Conference on Battery and Fuel Cell Technology

September 10-11, 2018 | London, UK

Chunsheng Shi, Siqi Wang and Ning Wang

Tianjin University, China

Posters & Accepted Abstracts: J Fundam Renewable Energy Appl

Abstract :

In recent years, silica (SiO2) has been regarded as a promising anode material for the lithium ion batteries (LIBs) due to its low discharge potential, high theoretical specific capacity, and abundant in nature. However, some intrinsic characteristics, such as the poor electrical conductivity, large volume variation during the repeated charge-discharge process and strong crystalline Si-O bond, to a large extent hinder the practical application of SiO2. Therefore, developing a strategy, which is easily controllable, low-cost, nontoxic and highly productive, to enhance the lithium storage performance of SiO2/C composites is necessary. In this work, we prepared the SiO2/C nanocomposites through a simple and low-cost heat treatment process. When the as-obtained nanocomposites were used as anodes for the lithium ion batteries, they exhibited a high specific capacity of 660 mA h g-1 at 100 mA g-1 after 200 cycles. In addition, a good rate capability was also achieved through the heat treatment. The improved electrochemical performance of the SiO2/C nanocomposites is mainly ascribed to the increment of crystalline interplanar spacing and the increased defects in the carbon-coated structure, which is beneficial to embed a larger number of lithium-ions. Recent Publications: 1. W.L. An, J.J. Fu, J.J. Su, L. Wang, X. Peng, K. Wu, Q.Y. Chen, Y.J. B, B. Gao, X.M. Zhang, J. Power Sources 345 (2017) 227. 2. H. Wang, P. Wu, M.T. Qu, L. Si, Y.W. Tang, Y.M. Zhou, T.H. Lu, ChemElectroChem 2 (2015) 508. 3. X. Cao, X.Y. Chuan, R.C. Masse, D.B. Huang, S. Li, G.Z. Cao, J. Mater. Chem. 3 (2015) 22739. 4. M.L. Jiao, K.L. Liu, Z.Q. Shi, C.Y. Wang, ChemElectroChem 4 (2017) 5. Z.N. Yuan, N.Q Zhao, C.S. Shi, E.Z Liu, C.N. He, F. He, Chem. Phys. Lett. 651 (2016) 19.

Biography :

Chunsheng Shi received his PhD from Tianjin University in 2002, and is currently a Professor of Materials Science and Engineering, Tianjin University. His research mainly focuses on composites and energy storge materials.

E-mail: csshi@tju.edu.cn