| Autor: |
Xiao, Zheng-wei, Zhang, Ying-jie, Hu, Guo-rong |
| Zdroj: |
Journal of Central South University; Dec2015, Vol. 22 Issue 12, p4507-4514, 8p |
| Abstrakt: |
The anoxic decomposition and influence of carbon precursors on the properties of LiFePO/C prepared by using FeO were investigated. X-ray powder diffractometry, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and carbon content and charge-discharge tests were applied to the characterization of the as-synthesized cathodes. Partial carbon is lost in the anaerobic decomposition of organic precursors and a high hydrogen content leads to a high residual carbon rate. Pyromellitic anhydride and citric acid participate in reactions before and in ball-milling. All the chosen carbon precursors are capable of producing LiFePO with high degree of crystallinity and purity. The carbon derived from α- D-glucose, pyromellitic anhydride, soluble starch, citric acid and polyacrylamide has a loose and porous texture in LiFePO/C which forms conduction on and between LiFePO particles. LiFePO/C prepared by using α- D-glucose, pyromellitic anhydride, citric acid and sucrose exhibits appreciable electrochemical performance. Graphite alone is able to enhance the electrochemical performance of LiFePO to a limited extent but incapable of preparing practical cathode. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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