Abstract
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.
Original language | English (US) |
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Pages (from-to) | 37-39 |
Number of pages | 3 |
Journal | Materials Letters |
Volume | 97 |
DOIs | |
State | Published - Feb 20 2013 |
Keywords
- Lithium ion battery
- Microstructure
- Physical vapor deposition
- Si/C multilayer thin films
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering