A new insight into the LiFePO4 delithiation process

作者：Lemos V^*; Guerini S; Mendes Filho J; Lala S M; Montoro L A; Rosolen J M

来源：Solid State Ionics, 2006, 177(11-12): 1021-1025.

DOI：10.1016/j.ssi.2006.03.008

• LiFePO4 delithiation
• metal doped LiFePO4
• lithium intercalated compounds
• lithium batteries
• vibrational spectroscopy

Raman and Fourier transform infrared measurements for LixM0.03Fe0.97PO4, M=Cr, Cu, Al, Ti were performed. The spectra for delithiated samples to a low content of lithium extraction are practically the same as those of LiFePO4. For a high content of lithium extraction, the spectra repeat that of FePO4. In the case of the Li0.11FePO4 oxide the spectra cannot be reproduced just by the superposition of the end member profiles. An additional broad band contribution is found in both Raman and infrared spectra probably due to a disordered structure present in the mixture. This suggests that the well accepted two-phase model for the delithiation process in LiFePO4 is incorrect. The model shoul

• 出版日期2006-4