Preparation of the Particle Size Controllable LiFePO₄/C and Its Electrochemical Profile Characterization

Authors

Ming-e WANG, Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China;
Jing-yuan LIU, Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China;
Meng-yan HOU, Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China;
Yong-yao XIA, Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China;Follow

Corresponding Author

Yong-yao XIA(yyxia@fudan.edu.cn)

Abstract

We adopted an effective route to prepare the particle size controllable core-shell structure carbon-coated LiFePO4 from different sized FePO4 precursors, varying from 80 nm, 200 nm and 1 μm by an in situ polymerization method integrated with a surface modification technology. The discharge capacities of the three sized LiFePO₄/C are, respectively, 162 mAh·g^-1, 142 mAh·g^-1 and 92 mAh·g^-1 at 0.1C rate. The nano-sized LiFePO₄-a/C (80 nm) delivers a discharge capacity as large as 100 mAh·g^-1 even at 30C, while the macroscopic LiFePO₄-c/C (1 μm) exhibits a much poorer discharge capacity of 54 mAh·g^-1 under the same current density. The carbon coated LiFePO₄ (LiFePO₄/C) also shows good chemical stability after the exposure to air atmosphere, in which the uniform carbon layer could prevent the LiFePO₄ from reacting with H₂O and O₂.

Graphical Abstract

Keywords

LiFePO4, Lithium-ion batteries, cathode materials, in-situ synthesis

DOI Link

https://doi.org/10.13208/j.electrochem.130362

Publication Date

2013-12-28

Online Available Date

2013-12-23

Revised Date

2013-08-28

Received Date

2013-06-25

Recommended Citation

Ming-e WANG, Jing-yuan LIU, Meng-yan HOU, Yong-yao XIA. Preparation of the Particle Size Controllable LiFePO₄/C and Its Electrochemical Profile Characterization[J]. Journal of Electrochemistry, 2013 , 19(6): 550-557.
DOI: 10.13208/j.electrochem.130362
Available at: https://jelectrochem.xmu.edu.cn/journal/vol19/iss6/8

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