Preparation and Electrochemical Performance of LiFePO4/C by Spray Drying Method Assisted with Organic Template

Authors

Quan-Bing LIU, School of Chemistry and Chemical Engineering, South China University of Technology, Key Lab for Fuel Cell Technology of Guangdong Province, Guangzhou 510641, China;
Yang-Mei JIANG, School of Chemistry and Chemical Engineering, South China University of Technology, Key Lab for Fuel Cell Technology of Guangdong Province, Guangzhou 510641, China;
Hui-Yu SONG, School of Chemistry and Chemical Engineering, South China University of Technology, Key Lab for Fuel Cell Technology of Guangdong Province, Guangzhou 510641, China;
Shi-Jun LIAO, School of Chemistry and Chemical Engineering, South China University of Technology, Key Lab for Fuel Cell Technology of Guangdong Province, Guangzhou 510641, China;

Corresponding Author

Shi-Jun LIAO(chsjliao@scut.edu.cn)

Abstract

In this work, the LiFePO4/C composites were prepared by the spray drying and carbothermal method, and were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge-discharge measurements. The effects of the organic assisted templates on the morphologies and electrochemical properties of the LiFePO4/C composites were investigated. The results showed that the morphology and microstructure of the composites could be tuned by incorporating with the different templates. The morphology of the composite appeared to be solid microspheres if no organic template was added, while porous microspheres, nest-like aggregation, and uniform nano-micro spheres, if citric acid, glucose, and PVA were used as the templates, respectively. Among all the samples, the composite prepared with PVA as a template also exhibited the best properties in batteries, including the highest tap density, the lowest charge transfer resistances and the highest capacities. The best discharge capacities were measured to be 156.7 and 92.1 mAh?g–1 at 0.1 and 5.0 C rate, respectively. The obvious charge-discharge plateaus at high rates and excellent cycling performance at various rates were achieved.

Graphical Abstract

Keywords

cathode materials, spray drying, assisted template, PVA

DOI Link

https://doi.org/10.61558/2993-074X.2874

Publication Date

2012-02-28

Online Available Date

2011-10-30

Revised Date

2011-09-26

Received Date

2011-09-06

Recommended Citation

Quan-Bing LIU, Yang-Mei JIANG, Hui-Yu SONG, Shi-Jun LIAO. Preparation and Electrochemical Performance of LiFePO4/C by Spray Drying Method Assisted with Organic Template[J]. Journal of Electrochemistry, 2012 , 18(1): Article 3.
DOI: 10.61558/2993-074X.2874
Available at: https://jelectrochem.xmu.edu.cn/journal/vol18/iss1/3