https://doi.org/10.15255/KUI.2015.017
Published: Kem. Ind. 64 (7-8) (2015) 393−397
Paper reference number: KUI-17/2015
Paper type: Preliminary communication
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Interface Synthesis of FePO4 with Different Morphologies and Effect of Morphology on the Electrochemical Performance of LiFePO4/C

Y. H. Luo, N. He, Y. C. Wang, W. G. Cao and P. Feng

Abstract

In our work, interface synthesis method was put forward to prepare FePO₄ with different morphologies, and the effect of morphology on the preparation and electrochemical performance of LiFePO₄/C was investigated. The results showed that the morphology of FePO₄ was amorphous and monoclinic at the treatment temperatures of 30 °C and 80 °C, respectively. LiFePO₄/C prepared from two crystal precursors were both hemispherical hollow with an olivine crystal structure. LiFePO₄/C produced from the monoclinic structured precursor exhibited smaller- sized morphology and better electrochemical performance, and its discharge capacities were 155.9 mA h g⁻¹ and 141.8 mA h g⁻¹ at the rates of 0.1 C and 1 C, respectively. After 150 cycles, its capacity retention was about 97.8 % and 95.1 % at 0.1 C and 1 C, respectively.

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Keywords

FePO4, LiFePO4/C, lithium-ion battery, composite materials, energy storage and conversion