Abstract
Two LiFePO 4 powders have been synthesized, i.e. using a natural ironstone and a commercial FeCl 2 ·4H 2 O product as the Fe sources, and their characteristics were compared. The x-ray absorption near-edge spectroscopy (XANES) data, Transmission Electron Microscope (TEM) images and Scanning Electron Microscope (SEM) micrographs were used to examine the value of E 0 and the oxidation number, determine the crystallite sizes, and determine their morphology, respectively. Results showed that the ironstone- and commercial-based LFP powders exhibited E 0 values of 7120.2 and 7119.6 eV respectively which are both almost equal to FeO and indicates that they have an oxidation number of 2 + as expected. In addition, the crystallite size of the ironstone-based LFP was smaller than that of the commercial one. Moreover, the SEM images showed that the natural LFP was more homogeneous than the commercial LFP.
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