Electrochemical Properties of LiFePO4/C Composite Improved by High Energy Milling

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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.

Info:

Periodical:

Materials Science Forum (Volumes 620-622)

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

Citation:

C. S. Kim et al., "Electrochemical Properties of LiFePO4/C Composite Improved by High Energy Milling", Materials Science Forum, Vols. 620-622, pp. 41-44, 2009

Online since:

April 2009

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$35.00

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