Characterization of Sol-Gel-synthesized LiFePO4 by multiple scattering XAFS

Inorganic Chemistry
Marco GiorgettiStefano Passerini

Abstract

X-ray absorption spectroscopy (XAS) was used to investigate the local structure arrangements of submicrocrystalline 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 one to produce the submicrometer 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.

References

Oct 15, 1986·Physical Review. B, Condensed Matter·M BenfattoI Davoli
Dec 1, 1995·Physical Review. B, Condensed Matter·A FilipponiC R Natoli
May 20, 2000·Journal of Biological Inorganic Chemistry : JBIC : a Publication of the Society of Biological Inorganic Chemistry·M GiorgettiR Marassi
Jan 16, 2003·Inorganic Chemistry·M GiorgettiM Berrettoni
Mar 6, 2003·Nature Materials·Sung-Yoon ChungYet-Ming Chiang
Jul 21, 2004·Journal of Synchrotron Radiation·M GiorgettiW H Smyrl

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Citations

Feb 8, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Giuliana AquilantiCarlo Santini
Jun 29, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Maura PelleiCarlo Santini
Jun 12, 2008·Inorganic Chemistry·Marco Giorgetti, Mario Berrettoni
Oct 3, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Barbara BallarinVanessa Prevot

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