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Energy Storage Materials Based on Iron Phosphate

Published online by Cambridge University Press:  01 February 2011

Pier Paolo Prosini ,
Maria Carewska ,
Marida Lisi ,
Stefano Passerini ,
Silvera Scaccia  and
Mauro Pasquali
Pier Paolo Prosini
Affiliation:
ENEA, C.R. Casaccia. Via Anguillarese 301, 00060 Roma, Italy.
Maria Carewska
Affiliation:
ENEA, C.R. Casaccia. Via Anguillarese 301, 00060 Roma, Italy.
Marida Lisi
Affiliation:
ENEA, C.R. Casaccia. Via Anguillarese 301, 00060 Roma, Italy.
Stefano Passerini
Affiliation:
ENEA, C.R. Casaccia. Via Anguillarese 301, 00060 Roma, Italy.
Silvera Scaccia
Affiliation:
ENEA, C.R. Casaccia. Via Anguillarese 301, 00060 Roma, Italy.
Mauro Pasquali
Affiliation:
Dipartimento ICMMPM, Facoltà di Ingegneria, Università di Roma “La Sapienza”, Roma, Italy.
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Abstract

Several iron phosphates were synthesized by solution-based techniques and tested as cathodes in non aqueous lithium cells. The addition of phosphate ions to a solution of iron (II) produced crystalline Fe3(PO4)2. This material is easily oxidized by air to form an amorphous phase that is able to reversibly intercalate lithium. The amorphous compound was identified to be a mixture of FePO4 and Fe2O3. A new synthetic route was developed to prepare pure amorphous FePO4. Amorphous LiFePO4 was obtained by chemical lithiation of FePO4. The material was heated at 500°C under reducing atmosphere to obtain nano-crystalline LiFePO4. This latter material showed excellent electrochemical performance when used as cathode of lithium cells.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 730: Symposium V – Materials for Energy Storage, Generation, and Transport , 2002 , V1.9
Copyright
Copyright © Materials Research Society 2002

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