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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 391-392Preparation of LiFePO4/C Composite Powders

Preparation of LiFePO₄/C Composite Powders

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Abstract:

LiFePO₄/C composite powders were prepared by a simple reaction of as-synthesized FePO₄•2H₂O, LiOH•H₂O, oxalic acid and citric acid. The influence of oxalic acid and citric acid in different ratios was investigated on morphology and electrochemical performance of LiFePO₄/C composite powders. The characterization of the composites included X-ray diffraction (XRD) and scanning electron microscopy (SEM). The XRD analysis indicates that the material is well crystallized without impurities. The obtained LiFePO₄/C composite powders with well dispersion at CA/OA ratio of 1:1.50 and the initial charge capacity reached 159.3 mAhg^-1 at 0.1C rate, meanwhile, the particles prepared at 1:0.75 were close to spherical in shape and the specific capacity value was 149.8 mAhg^-1 at 0.1C rate, with a slight decrease on greater C-rates reaching 141.3 mAhg^-1 at 1C.

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Chemical Engineering and Material Properties

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Periodical:

Advanced Materials Research (Volumes 391-392)

Pages:

377-380

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.391-392.377

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Online since:

December 2011

Authors:

Guo Jun Li, Ming Yang, Hai Li Jing, Rui Ming Ren

Keywords:

Citric Acid (CA), Electrochemical Property, LiFePO₄/C, Oxalic Acid

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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