Electrochemical Performance of LiFePO₄/C Synthesized via Aqueous Solution-Evaporation Route

Authors

Ning-yu GU, Department of Chemistry, Nanchang University, Nanchang 330031, Jiangxi, China;Follow
Xing-hua HE, Department of Chemistry, Nanchang University, Nanchang 330031, Jiangxi, China;
Yang LI, Department of Chemistry, Nanchang University, Nanchang 330031, Jiangxi, China;

Corresponding Author

Ning-yu GU(nygu@ncu.edu.cn)

Abstract

The LiFePO₄/C samples have been synthesized via an aqueous solution-evaporation route with LiH₂PO₄, FeC₂O₄.2H₂O as raw materials and citric acid as a carbon source. X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were used to analyze structure and morphology of the samples. The electrochemical performances of the LiFePO₄/C cathodes were characterized by charge/discharge cures and electrochemical impedance spectroscopy (EIS). The results show that the LiFePO₄/C sample, calcined at 700 °C and contained 3.03% (by mass) carbon, exhibited a highly pure crystalline phase with the primary particles sizes of 100 nm. The surfaces of those particles were covered by a carbon layer of 5 nm in thickness. At the rates of 0.5C, 2C, 5C, and 10C, where 1C corresponds to 170 mA.g^-1, the discharge capacities of 148.2, 142.7, 127.4, and 108.5 mAh.g^-1, were delivered, respectively, with the perfect cycling stabilities.

Graphical Abstract

Keywords

lithium-ion batteries, cathode material, LiFePO4/C, citric acid

DOI Link

https://doi.org/10.61558/2993-074X.2106

Publication Date

2013-04-28

Online Available Date

2012-03-29

Revised Date

2012-03-19

Received Date

2012-02-17

Recommended Citation

Ning-yu GU, Xing-hua HE, Yang LI. Electrochemical Performance of LiFePO₄/C Synthesized via Aqueous Solution-Evaporation Route[J]. Journal of Electrochemistry, 2013 , 19(2): 146-150.
DOI: 10.61558/2993-074X.2106
Available at: https://jelectrochem.xmu.edu.cn/journal/vol19/iss2/4