| Autor: |
Sun, Y.-K., Cho, S.-W., Lee, S.-W., Yoon, C. S., Amine, K. |
| Předmět: |
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| Zdroj: |
Journal of The Electrochemical Society; Mar2007, Vol. 154 Issue 3, pA168-A172, 4p, 2 Charts, 8 Graphs |
| Abstrakt: |
Li[Ni1/3Co1/3Mn1/3]O2 powders were modified by coating their surface with amorphous AIF3 as a new coating material. The AIF3-coated Li[Ni1/3Co1/3Mn1/3]O2 electrode showed improved cycle performance and rate capability under a high cutoff voltage range of 4.5 and 4.6 V. AC impedance results showed that the AIF3-coated Li[Ni1/3Co1/3Mn1/3]O2 has stable charge transfer resistance (Rct) regardless of the cycle number. Electron diffraction analysis also showed that no structural transition of the primary particles was observed for the AIF3-coated electrode. Electrochemical impedance spectroscopy and electron microscopy indicate that AIF3 coating plays an important role of stabilizing the interface between cathode and electrolyte. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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