Synthesis and Electrochemical Properties of Carbon-Mixed LiEr0.02Fe0.98PO4 Cathode Material for Lithium-ion Batteries

J Mater Sci Technol ›› 2011, Vol. 27 ›› Issue (9): 861-864.

• Regular Papers • Previous Articles

Synthesis and Electrochemical Properties of Carbon-Mixed LiEr_0.02Fe_0.98PO₄ Cathode Material for Lithium-ion Batteries

Huseyin Goktepe¹⁾, Halil Sahan²⁾, Ahmet Ulgen²⁾, Saban Patat²⁾

1) Department of Chemistry, M C» {kr{kc{o·glu Vocational High School, University of Erciyes, Turkey
2) Department of Chemistry, Science of Faculty, University of Erciyes, Kayseri, 38039, Turkey

Received:2010-10-28 Revised:2011-05-31 Online:2011-09-28 Published:2011-09-28
Contact: Huseyin Goktepe
Supported by:
the Research Foundation of Erciyes University FBA-08-440 (Kayseri, Turkey)

Abstract

Abstract: LiEr_0.02Fe_0.98PO₄/C composite cathode was synthesized by a simple solution method with polyethylene glycol (PEG) as the reductive agent and carbon source. The effect of erbium doping on the electrochemical behavior of LiFePO₄ was studied in this paper. The samples were characterized by X-ray powder diffraction and scanning electron microscopy and the electrochemical properties were investigated by the charge-discharge test. An initial discharge capacity of 149 mAh?g^-1 was achieved for the LiEr_0.02Fe_0.98PO₄/C composite cathode with a rate of 0.1 C. The electronic conductivity of Er doped LiFePO₄/C was measured as 10^-2 S?cm^-1. The results indicated that erbium doping did not destroy the lattice structure of LiFePO₄ and enlarge the lattice volume. These changes are beneficial to the improvement of the electrochemical performance of the LiFePO₄ cathode.

Key words: LiFePO₄, Cathode, Erbium doping, Lithium batteries

Huseyin Goktepe, Halil Sahan, Ahmet Ulgen, Saban Patat. Synthesis and Electrochemical Properties of Carbon-Mixed LiEr_0.02Fe_0.98PO₄ Cathode Material for Lithium-ion Batteries[J]. J Mater Sci Technol, 2011, 27(9): 861-864.

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Synthesis and Electrochemical Properties of Carbon-Mixed LiEr_0.02Fe_0.98PO₄ Cathode Material for Lithium-ion Batteries

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