| Autor: |
Chen, Mindong, Teng, Fei, Li, Guiqing, Shi, Huaxia, Wang, Jun, Xu, Mengjiao, Ji, Xuequn, Lu, Tianyun, Lv, Yingjie, Mho, Sun-il |
| Zdroj: |
Ionics; Jun2012, Vol. 18 Issue 6, p541-547, 7p |
| Abstrakt: |
In this work, the LiFePO samples are synthesized in ethylene glycol/water (EG/W) and aqueous solution, respectively. The samples are characterized by X-ray diffraction, scanning electron microscopy, high-resolution transmission electron microscopy, electron diffraction, and nitrogen adsorption isotherms. The results show that the reaction medium and the surfactant molecules have the significant influences on the particle morphology. In the presence of dodecylbenzenesulfonic acid sodium, the highly uniform LiFePO hierarchical nanostructures are obtained in EG/W, which consist of the nanoplates. Nevertheless, the irregular LiFePO microparticles are obtained in aqueous solution. Furthermore, the electrochemical properties of the samples are mainly investigated. The hierarchical LiFePO sample exhibits a higher rate capability and an improved cyclability than the aggregated irregular microparticles, which have been ascribed to the highly uniform hierarchical nanostructures. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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