Journal
MATERIALS LETTERS
Volume 97, Issue -, Pages 37-39Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2013.01.027
Keywords
Physical vapor deposition; Microstructure; Lithium ion battery; Si/C multilayer thin films
Funding
- Basic Scientific Research Business Expenses of the Central University [lzujbky-2010-86]
- Open Project of Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University [LZUMMM2012014]
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We have synthesized the amorphous silicon/carbon (Si/C) multilayer thin films on Cu substrate and investigated their applications as the anode for high rate rechargeable Li-ion batteries. X-ray diffraction and Raman spectrum revealed that the films were amorphous. The electrochemical evaluation was performed with constant current charge/discharge test under various loading currents in PC. The results showed a high first initial capacity of 3107 mAh g(-1) and a high first coulombic efficiency of 83% at 15C rate (60 A/g). In the following cycles, a capacity of 2000 mAh g(-1) at 30C (120 A/g) and 1500 mAh g(-1) at 60C (240 A/g) were attained with a retention of 99%. The test predicted that the Si/C multilayer thin films were a promising anode material for lithium ion batteries. (C) 2013 Elsevier B.V. All rights reserved.
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