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Synthesis and Electrochemical Behaviour of Ramsdellite LiCrTiO4

Published online by Cambridge University Press:  11 February 2011

F. García-Alvarado ,
M. Martín-Gil  and
A. Kuhn
F. García-Alvarado
Affiliation:
Departament of Chemistry, Universidad San Pablo CEU, E-28688 Boadilla del Monte, Madrid, (Spain); e-mail: flgaal@ceu.es
M. Martín-Gil
Affiliation:
Departament of Chemistry, Universidad San Pablo CEU, E-28688 Boadilla del Monte, Madrid, (Spain); e-mail: flgaal@ceu.es
A. Kuhn
Affiliation:
Departament of Chemistry, Universidad San Pablo CEU, E-28688 Boadilla del Monte, Madrid, (Spain); e-mail: flgaal@ceu.es
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Abstract

A ramsdellite with composition LiCrTiO4 has been obtained by heating the spinel of same composition to high temperature. The new ramsdellite has been investigated in view of its possible use as an electrode material in lithium rechargeable batteries. Lithium can be partially extracted from ramsdellite LiCrTiO4 and further intercalated into, by contrast to the spinel of same composition. The average operating voltage during lithium extraction is 4 Volts vs. lithium, and the process produces a specific capacity of 90 mAh/g at 0.1 mA/cm2. On the other hand, upon reduction from open circuit voltage, lithium can be reversibly intercalated into the ramsdellite polymorph at ca. 1.5 V vs. lithium yielding a rechargeable capacity of 110 mAh/g at 0.1 mA/cm2.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 756: Symposia EE/FF – Solid-State Ionics – Materials for Fuel Cells and Fuel Processors , 2002 , EE7.9
Copyright
Copyright © Materials Research Society 2003

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References

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