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Titolo:
Reaction mechanism of the olivine-type Li-x(Mn0.6Fe0.4)PO4 (0 <= x <= 1)
Autore:
Yamada, A; Kudo, Y; Liu, KY;
Indirizzi:
Frontier Sci Labs, Yokohama, Kanagawa 2400036, Japan Frontier Sci Labs Yokohama Kanagawa Japan 2400036 Kanagawa 2400036, Japan Sony Corp, Tech Support Ctr, Yokohama, Kanagawa 2400036, Japan Sony Corp Yokohama Kanagawa Japan 2400036 kohama, Kanagawa 2400036, Japan
Titolo Testata:
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
fascicolo: 7, volume: 148, anno: 2001,
pagine: A747 - A754
SICI:
0013-4651(200107)148:7<A747:RMOTOL>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
LITHIUM BATTERIES; CATHODES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Yamada, A Frontier Sci Labs, Yokohama, Kanagawa 2400036, Japan Frontier Sci Labs Yokohama Kanagawa Japan 2400036 400036, Japan
Citazione:
A. Yamada et al., "Reaction mechanism of the olivine-type Li-x(Mn0.6Fe0.4)PO4 (0 <= x <= 1)", J ELCHEM SO, 148(7), 2001, pp. A747-A754

Abstract

The charge-discharge reaction mechanism of the olivine-type Li-x(Mn0.6Fe0.4)PO4 (0 less than or equal to x less than or equal to 1.0), a possible 4 Vclass cathode material for lithium batteries, was investigated using equilibrium voltage measurements, X-ray diffraction, Mossbauer spectroscopy, andX-ray absorption spectroscopy. The Rat two-phase region with an open-circuit voltage (OCV) of ca. 4.1 V (region I: 0 less than or equal to x less than or equal to 0.6. Mn3+/Mn2+) and the S-curved single-phase region with OCVapproximate to 3.5 V (region II: 0.6 less than or equal to x less than or equal to 1.0, Fe3+/Fe2+) were clearly identified together with the corresponding change in the unit cell dimensions of the orthorhombic lattice. Thesefeatures show significant differences from the reaction mechanism of LixFePO4 (0 less than or equal to x less than or equal to 1), in which the wholeFe3+/Fe2+ reaction proceeds in a two-phase manner (LiFePO4-FePO4) with a Rat voltage profile at 3.4 V. (C) 2001 The Electrochemical Society.

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Documento generato il 02/04/20 alle ore 18:16:31