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Silicon–Graphene Composite Anodes for High-Energy Lithium Batteries
Article first published online: 7 JAN 2013
Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Volume 1, Issue 1, pages 77–84, January 2013
How to Cite
Ren, J.-G., Wu, Q.-H., Hong, G., Zhang, W.-J., Wu, H., Amine, K., Yang, J. and Lee , S.-T. (2013), Silicon–Graphene Composite Anodes for High-Energy Lithium Batteries. Energy Technology, 1: 77–84. doi: 10.1002/ente.201200038
- Issue published online: 16 JAN 2013
- Article first published online: 7 JAN 2013
- Manuscript Received: 31 OCT 2012
- Research Grants Council of Hong Kong SAR, China. Grant Number: CityU102010
- National Natural Science Foundation of China. Grant Numbers: 51072126, 51132006
- National Basic Research Program of China. Grant Numbers: 2009CB623703, 2012CB932402, 2012CB932600
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
A chemical vapor deposition process is introduced to prepare silicon (Si)–graphene composite anode materials for lithium-ion batteries. Highly ordered crystalline Si particles are deposited onto graphene sheets by using a liquid chlorosilane as Si source. The Si–graphene composite exhibits high utilization of Si in charge–discharge processes. The capacity retention of 90 % after 500 full cycles and an average Coulombic efficiency in excess of 99.5 % are achieved in half cells. Moreover, atomic layer deposition (ALD) Al2O3 coating is directly applied on the Si-graphene electrode, which greatly suppresses the side reactions between the electrode and electrolyte, resulting in the enhancement in initial Coulombic efficiency and reversible capacity. Finally, a 3.6 V full cell device is demonstrated, which works very well by combining a Si-graphene anode with a Li-excess layer-structured composite Li1.2Ni0.2Mn0.6O2 cathode. This approach is very promising for realizing a high-energy lithium-ion battery.