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Synthesis and Characterization of the Positive Electrode Material LiFePO4/C under Different Microwave Heating Time

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Abstract:

The precursors of LiFePO4 were prepared by a sol-gel method using lithium acetate dehyd- rate, phosphoric acid, ferrous sulfate, and citric acid as raw materials. LiFePO4/C cathode material was synthesized by microwave method. The effect of different microwave time on the performance of the resulting LiFePO4/C was investigated. Structural characterization by X-ray diffraction and scann- ing electron microscopy proved that the phase LiFePO4 was synthesized under the optimal conditions of microwave 10 min(600W), the charge-discharge performance indicated that the LiFePO4/C had a maximal specific discharge capacity of 122.5 mAh•g-1 (0.1C) in the first cycle and improve capacity retention. Further AC impendence measurements indicate the sample produced by microwave 10 min shows the low charge transfer resistance.

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Periodical:

Advanced Materials Research (Volumes 287-290)

Pages:

1477-1480

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.287-290.1477

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Online since:

July 2011

Authors:

Heng Wang, Qing Chang, Jian Peng Shi

Keywords:

Electrochemical Property, LiFePO4/C Cathode Material, Lithium-Ion Battery, Microwave Method, Sol-Gel Method

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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