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- W2904972950 abstract "Abstract Development of LiFePO 4 cathode material with high cycle life through Si doping (substituting Si at P sites of LiFePO 4 ) has shown that small changes to the structure of LiFePO 4 can significantly affect the performance of Li ion batteries. However, determining the nature of elemental doping and their effects on the electronic and atomic structure of LiFePO 4 remains challenging. Here we present x‐ray absorption spectroscopy and x‐ray fluorescence mapping as ideal characterization methods for understanding the effect of Si doped LiFePO 4 prepared using a melt‐synthesis process. x‐ray absorption spectra of silicon doped LiFePO 4 indicate subtle changes in the local structure surrounding the dopants compared to SiO 2 and amorphous glass phases formed as impurities in Si containing undoped samples. The study of Fe and P K‐edges x‐ray absorption spectra illustrates the effect of Si in the LiFePO 4 structure in doped and impurity containing samples. Utilizing x‐ray absorption spectroscopy, in conjunction with x‐ray fluorescence mapping, has enabled a better overview of the non‐uniform nature of prepared ingot samples. These results highlight the power of x‐ray absorption spectroscopy as a tool for better understanding the structure of modified LiFePO 4 and subsequently designing materials for Li ion batteries." @default.
- W2904972950 created "2018-12-22" @default.
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- W2904972950 date "2019-02-11" @default.
- W2904972950 modified "2023-10-01" @default.
- W2904972950 title "Chemical speciation and mapping of the Si in Si doped LFP ingot with synchrotron radiation technique" @default.
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- W2904972950 doi "https://doi.org/10.1002/cjce.23430" @default.
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