Publication Details

This article was originally published as Wang, GX, Bewlay, S, Needham, SA et al, Synthesis and Characterization of LiFePO4 and LiTi0.01Fe0.99PO4 Cathode Materials, Journal of the Electrochemical Society, 153(1), 2006, A25-A31. Copyright The Electrochemical Society. Original journal available here.


Nanocrystalline LiFePO4 and doped LiTi0.01Fe0.99PO4 powders were synthesized via a sol-gel preparation route. High-resolution tunneling electron microscopy observation and energy dispersive spectroscopy, mapping show the homogeneous distribution of dopant Ti cations in the crystals. Fe and O K -edge X-ray absorption near-edge structure (XANES) measurements show that Ti4+ doping induces an increased unoccupied d-state in LiFePO4, resulting in an enhanced p-type semiconductivity. In situ Fe K -edge XANES measurements of Ti-doped and undoped LiFePO4 electrodes have been performed to determine the change of Fe valence during the lithium intercalation and de-intercalation processes. Both LiFePO4 and doped LiTi0.01Fe0.99PO4 cathodes demonstrate good electrochemical performance.

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