Synthesis of LiFePO4/C Composite Cathode Materials by a Novel Carbothermal Reduction Method and Its Performance

doi:10.3724/SP.J.1077.2007.00283

Abstract

Abstract: LiFePO₄/C composite cathode materials were synthesized by a novel carbothermal reduction(CTR) method using glucose as carbon resource. The precursors and the products were characterized by TG-DTA, XRD, TEM, and the reaction mechanism was investigated. The electrochemical performance of the samples was measured. The results show that the new method can reduce synthesis temperature, and the sample prepared at 600℃ for 24h can deliver a discharge capacity of 156mAh·g^-1 at 0.05C. The first discharge capacities of LiFePO4 at 0.1C, 0.2C, 1C are 146mAh·g^-1, 135mAh·g^-1, 130mAh·g^-1, 121mAh·g^-1, respectively. It retains discharge capacity of 119mAh·g^-1 at 1C after 30 cycles, with only 1.56% capacity decrease.

Key words: lithium-ion battery, cathode materials, LiFePO4, carbothermal reduction method

CLC Number:

TM912

LIU Su-Qin,GONG Ben-Li,,ZHANG Ge,LI Shi-Cai. Synthesis of LiFePO₄/C Composite Cathode Materials by a Novel Carbothermal Reduction Method and Its Performance[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2007.00283.

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Synthesis of LiFePO₄/C Composite Cathode Materials by a Novel Carbothermal Reduction Method and Its Performance

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