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EnglishX-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.
| Titolo: | Characterization of Sol-gel Synthesized LiFePO4 by Multiple Scattering XAFS |
| Autore/i: | GIORGETTI, MARCO; BERRETTONI, MARIO; S. Scaccia; S. Passerini |
| Autore/i Unibo: | |
| Anno: | 2006 |
| Rivista: | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1021/ic0521170 |
| 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. |
| Data prodotto definitivo in UGOV: | 2006-04-20 10:39:42 |
| Appare nelle tipologie: | 1.01 Articolo in rivista |
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http://hdl.handle.net/11585/27504
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