Enhancement of the electrochemical performance in LiFePO4 cathode materials synthesized by using the sol-gel method
| Autor: | Kyong-Soo Hong, Jong Seong Bae, Myoung Gyu Ha, Euh Duck Jeong |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Journal of Analytical Science and Technology, Vol 2, Iss 1, Pp 7-12 (2010) |
| Druh dokumentu: | article |
| ISSN: | 2093-3134 2093-3371 |
| DOI: | 10.5355/JAST.2011.7 |
| Popis: | LiFePO4 powders were synthesized by using the sol-gel and the solid-state reaction methods. The chemical states of Fe ions were studied by using XPS, and their electrochemical properties according to the oxidation states of Fe ions were compared. The average oxidation state of Fe ions in LiFePO4 powders synthesized by using the solid-state reaction method was found to be Fe3+, on the other hand, that of Fe ions synthesized by using the sol-gel method was found to be Fe2+. The obtained discharge capacities were 50 mAh/g and 120 mAh/g at a rate 0.1 C in LiFePO4 synthesized by using the solid-state reaction and sol-gel methods, respectively. Relatively a good cycling stability was observed in sol-gel prepared powder. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|