Effect of Heating Time on the Structural and Electrochemical Properties of LiFePO4 by Molten Salt Method

Li, Xiao Min; Zou, Zheng Guang; Wu, Yi; Long, Fei; Yao, Dong Ye

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Home > Key Engineering Materials > High-Performance Ceramics V > Effect of Heating Time on the Structural and...

Paper Title:

Effect of Heating Time on the Structural and Electrochemical Properties of LiFePO₄ by Molten Salt Method

Periodical	Key Engineering Materials (Volumes 368 - 372)
Main Theme	High-Performance Ceramics V
Edited by	Wei Pan and Jianghong Gong
Pages	299-301
DOI	10.4028/www.scientific.net/KEM.368-372.299
Citation	Zheng Guang Zou et al., 2008, Key Engineering Materials, 368-372, 299
Online since	February, 2008
Authors	Zheng Guang Zou, Xiao Min Li, Yi Wu, Fei Long, Dong Ye Yao
Keywords	Cathode Material, Heating Time, Lithium Iron Phosphate, Molten Salt Method
Price	US$ 28,-

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Abstract

Well-crystallized LiFePO4 cathode materials were synthesized by NaCl-KCl molten salt method. The effect of heating time on the structure, morphology and electrochemical properties of the materials were studied in detail. Single olivine-type LiFePO4 phase was obtained, and the morphology and particle size of the powders could be controlled by changing the synthesis conditions. It was shown that LiFePO4 cathode material synthesized at 680°C for 3h with the salt content N=2 (defining the molar ratio of NaCl-KCl/LiFePO4 as N) had a narrow particle-size distribution and spherical or quasi-spherical shape. Meanwhile, the tap density of the cathode material reached the maximum of 1.501gcm-3. The charge-discharge test indicated that the initial charge and discharge specific capacity reached 138mAhg-1 and 125mAhg-1 respectively at the current density of 0.3mAcm-2.