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Preparation of Niobium Oxides Cathodes by Chimie Douce and Some Electrochemical Properties

Published online by Cambridge University Press:  10 February 2011

A. Hernandez ,
E. Sanchez ,
L. C. Torres-Gonzalez ,
A. F. Fuentes  and
L. M. Torres-Martinez
A. Hernandez
Affiliation:
Facultad de Ciencias Químicas, División de Estudios Superiores, Universidad Autónoma de Nuevo León, Apartado Postal 1864, Monterrey, NL 64570, México
E. Sanchez
Affiliation:
Facultad de Ciencias Químicas, División de Estudios Superiores, Universidad Autónoma de Nuevo León, Apartado Postal 1864, Monterrey, NL 64570, México
L. C. Torres-Gonzalez
Affiliation:
Facultad de Ciencias Químicas, División de Estudios Superiores, Universidad Autónoma de Nuevo León, Apartado Postal 1864, Monterrey, NL 64570, México
A. F. Fuentes
Affiliation:
Facultad de Ciencias Químicas, División de Estudios Superiores, Universidad Autónoma de Nuevo León, Apartado Postal 1864, Monterrey, NL 64570, México
L. M. Torres-Martinez
Affiliation:
Facultad de Ciencias Químicas, División de Estudios Superiores, Universidad Autónoma de Nuevo León, Apartado Postal 1864, Monterrey, NL 64570, México
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Abstract

Sol gel chemistry has been a useful technique to achieve hard-to-prepare metastable materials. Niobium oxide, for instance has a thermodynamic preference to crystallize on monocyclic lattice. Here, we were able to achieve synthesis of orthorhombic motif with a careful sol-gel preparation and tailored thermal treatment. Furthermore, formation of lithium inserted Nb205 phases were studied by electrochemical methods. When lithium is inserted, several single phases LixNb205 were observed in the range of 0 ≤ x ≤ 3.3 between 3.0 and 0.75 V. Even though the reaction is only reversible for x ≤ 1.8. Also, T-Nb205 polymorph showed improved intercalation characteristics.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 548: Symposia EE – Solid State Ionics V , 1998 , 245
Copyright
Copyright © Materials Research Society 1999

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References

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