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Hydrated iron phosphates FePO4·nH2O and Fe4(P2O7)3·n H2O as 3 V positive electrodes in rechargeable lithium batteries

TitoloHydrated iron phosphates FePO4·nH2O and Fe4(P2O7)3·n H2O as 3 V positive electrodes in rechargeable lithium batteries
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2002
AutoriMasquelier, C., Reale P., Wurm C., Morcrette M., Dupont L., and Larcher D.
RivistaJournal of the Electrochemical Society
Volume149
PaginazioneA1037-A1044
ISSN00134651
Parole chiaveAmorphous materials, Crystalline materials, Cyclic voltammetry, Electric contacts, Electric potential, Electrochemical electrodes, Iron phosphates, Lithium batteries, Lithium insertion, Phosphates, Surface area, Surface properties
Abstract

Hydrated Fe111 phosphates were investigated as positive electrode materials in lithium batteries. Reversible lithium insertion into amorphous and crystalline FePO4·nH2O and Fe4(P2O7)3·n H2O compositions was found at potentials between 3.5 and 2.5 V vs. Li+/Li. The roles of (i) specific surface area, (ii) amorphous vs. crystalline state, (iii) H2O content, and (iv) electronic contact between particles in the composite positive electrode, on the electrochemical performances of these materials are discussed. Very stable cycling was obtained for optimized FePO4·1.6H2O and Fe4(P2O7)3·4H2O electrodes at an average voltage of 3.0 and 3.2 V vs. Li+/Li, respectively.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-0036689679&doi=10.1149%2f1.1489686&partnerID=40&md5=707cdb5931e51c33418cdde5d11cf743
DOI10.1149/1.1489686
Citation KeyMasquelier2002