Electrochemical Properties of LiFePO4/C Composite Improved by High Energy Milling |
| Journal |
Materials Science Forum (Volumes 620 - 622) |
| Volume |
Eco-Materials Processing and Design X |
| Edited by |
Hyungsun Kim, JienFeng Yang, Tohru Sekino and Soo Wohn Lee |
| Pages |
41-44 |
| DOI |
10.4028/www.scientific.net/MSF.620-622.41 |
| Online since |
April, 2009 |
| Authors |
Chang Sam Kim,
Sung Ik Hwang,
Shin Woo Kim
|
| Keywords |
Carbon Coating, Cathode, Electrical Conductivity, High Energy Milling, LiFePO4, Lithium Ion Battery |
| Abstract |
The electrochemical properties of LiFePO4 as a cathode of lithium ion batteries considerably depend on a particle size of LiFePO4 and a condition of carbon coating. In this study, LiFePO4 powders were prepared using ultrasonic spray pyrolysis method, and then LiFePO4/C composites were made by infiltrating sucrose solution into LiFePO4 powders, drying, high-energy milling and annealing. The effects of high-energy milling were analyzed by comparing with electrochemical properties of powders synthesized without high-energy milling. It was found that the milling process drastically reduced the particle size of synthesized powders and electrical conductivity, and improved discharge capacity, cycle stability and rate performance. |
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