Effect of synthesis temperature and molar ratio of organic lithium salts on the properties and electrochemical performance of LiFePO4/C composites
| Autor: | Xuebu Hu, Zhongqi Shi, Xinglan Huang, Bin Tan, Ming Huang, Kerun Yang, Zhenghua Deng |
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| Rok vydání: | 2011 |
| Předmět: |
Diffraction
Thermogravimetric analysis Materials science Scanning electron microscope Inorganic chemistry chemistry.chemical_element Raw material Condensed Matter Physics Electrochemistry Cathode law.invention chemistry law Differential thermal analysis General Materials Science Lithium Electrical and Electronic Engineering |
| Zdroj: | Journal of Solid State Electrochemistry. 16:811-818 |
| ISSN: | 1433-0768 1432-8488 |
| Popis: | LiFePO4/C cathode materials were synthesized through in situ solid-state reaction route using Fe2O3, NH4H2PO4, Li2C2O4, and lithium polyacrylate as raw materials. The precursor of LiFePO4/C was investigated by thermogravimetric/differential thermal analysis. The effects of synthesis temperature and molar ratio of organic lithium salts on the performance of samples were characterized by X-ray diffraction, scanning electron microscopy, electrochemical impedance spectra, cyclic voltammogram, and constant current charge/discharge test. The sample prepared at optimized conditions of synthesis temperature at 700 °C and molar ratio with 1.17:1 exhibits excellent rate performance and cycling stability at room temperature. |
| Databáze: | OpenAIRE |
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