Electrochemical Properties of LiFePO4/C Composite Improved by High Energy Milling
- Electrochemical Properties of LiFePO4/C Composite Improved by High Energy Milling
- 김창삼; 황성익; 김신우
- lithium ion battery; cathode; LiFePO4; carbon coating; electrical conductivity; high energy millng
- Issue Date
- Materials science forum
- VOL 620-622, 41-44
- 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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