Solvothermal Synthesis of Nanometer LiFePO4/C Composite Cathode Materials

Chin J Mater Res

2011, Vol. 25

Issue (3): 321-326 DOI:

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Solvothermal Synthesis of Nanometer LiFePO4/C Composite Cathode Materials

TIAN Li ^1,2, HUANG Kelong¹

1.School of Chemistry and Chemical Engineering, Central South University, Changsha 410083
2.Department of Material Science and Engineering, Hunan University of Science and Technology, Xiangtan 411201

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TIAN Li, HUANG Kelong. Solvothermal Synthesis of Nanometer LiFePO4/C Composite Cathode Materials. Chin J Mater Res, 2011, 25(3): 321-326.

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Abstract Nanosized LiFePO4/C composite cathode materials have been synthesized via solvothermal method, using sucrose as carbon source and glycol as solvent. The phase, morphology, structure, composition and performance of LiFePO4/C powders were characterized. The results show that LiFePO4/C composite has uniform nanorod morphology with the diameter of about 100 nm, well-crystallinity and monodispersion. Galvanostatic charge-discharge tests showed that the size-reducation and carbon-coating of LiFePO4/C nanograins are in favor of optimizing the electrochemical performance of LiFePO4 positive materials. The first charge and discharge specific capacities of 166 mAh·g−1 and 164 mAh·g−1 were obtained at 0.1 C, while the voltage platforms were 3.45 V and 3.40 V, respectively. The nanosized LiFePO4/C composite cathode materials retained high stability after 20 cycles at 5 C, with the specific capacity retention up to 95.4%.

Key words: synthesizing and processing technics solvothermal synthesis LiFePO4/C nanomaterials electrochemical properties

Received: 23 February 2011

ZTFLH:	TB333
	TM912.9

Fund:

Supported by China Postdoctoral Science Foundation No.20100480947, Postdoctoral Science Foundation of Central South University No.1332-74341015511, Doctor Start-up Research Fund in Hunan University of Science and Technology No.E51079, and the Teaching and Education Reform Program in Hunan University of Science and Technology No.G30953.

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