X-ray Absorption Spectroscopy (XAS) was used to investigate the local structure arrangements of sub-microcrystalline lithium iron phosphate and its precursors. The former material, proven to be very promising as active cathode material in lithium metal and lithium-ion batteries, was synthesized through a new procedure that combines a simple sol-gel precipitation with a moderate temperature (e.g., low cost) heat treatment. X-Ray Absorption Near Edge Structure (XANES) and Extended X-Ray Absorption Fine Structure (EXAFS) spectra taken at the Fe K-edge pointed out the modification of the Fe site during the synthesis steps that allow to produce the sub-micron size crystalline LiFePO4 (active material) useful for batteries applications. The XAS investigation has shown that such a material is different from the conventional crystalline LiFePO4 on the short range order. The difference is attributed to the synthesis procedure.

Characterization of Sol-gel Synthesized LiFePO4 by Multiple Scattering XAFS

GIORGETTI, MARCO;BERRETTONI, MARIO;
2006

Abstract

X-ray Absorption Spectroscopy (XAS) was used to investigate the local structure arrangements of sub-microcrystalline lithium iron phosphate and its precursors. The former material, proven to be very promising as active cathode material in lithium metal and lithium-ion batteries, was synthesized through a new procedure that combines a simple sol-gel precipitation with a moderate temperature (e.g., low cost) heat treatment. X-Ray Absorption Near Edge Structure (XANES) and Extended X-Ray Absorption Fine Structure (EXAFS) spectra taken at the Fe K-edge pointed out the modification of the Fe site during the synthesis steps that allow to produce the sub-micron size crystalline LiFePO4 (active material) useful for batteries applications. The XAS investigation has shown that such a material is different from the conventional crystalline LiFePO4 on the short range order. The difference is attributed to the synthesis procedure.
2006
M. Giorgetti; M. Berrettoni; S. Scaccia; S. Passerini
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/27504
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