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Electrochemical Study, Synthesis and Microstructural Characterization of Lithium and Sodium Inserted W18O49.

Published online by Cambridge University Press:  16 February 2011

A. Martinez De La Cruz ,
Leticia M. Torres-Martinez ,
F. Garciaalvarado ,
E. Moran  and
M. A. Alario-Franco
A. Martinez De La Cruz
Affiliation:
Departamento de Química Inorgínica, Facultad de Ciencias Químicas, Universidad Complutense, Madrid 28040, Spain Facultad de Ciencias Químicas, Universidad Autonóma de Nuevo León, Apartado Postal 1864, Monterrey, Móxico
Leticia M. Torres-Martinez
Affiliation:
Facultad de Ciencias Químicas, Universidad Autonóma de Nuevo León, Apartado Postal 1864, Monterrey, Móxico
F. Garciaalvarado
Affiliation:
Departamento de Química Inorgínica, Facultad de Ciencias Químicas, Universidad Complutense, Madrid 28040, Spain
E. Moran
Affiliation:
Departamento de Química Inorgínica, Facultad de Ciencias Químicas, Universidad Complutense, Madrid 28040, Spain
M. A. Alario-Franco
Affiliation:
Departamento de Química Inorgínica, Facultad de Ciencias Químicas, Universidad Complutense, Madrid 28040, Spain
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Abstract

The formation of lithium inserted W18O49 phases has been studied byelectrochemical methods. When lithium is inserted, several single phases LixW18O49 are observed in the range 0 ≤ x ≤ 40 between 3 and 1 V. Nevertheless the reaction is reversible only for x ≤ 22. Chemical reactions of W18O49 with different quantities of n-butyllithium have been carried out to isolate and characterize some of these phases. For Li17W18O49, this is ˜1:1 Li/W ratio, electron diffraction experiments clearly indicate that lithium produces a periodicity change, doubling the a, b and c cell parameters. On the other hand, when sodium is inserted in W18O49 two single phase regions NaxW18O49 are observed within the range 0 ≤ x ≤ 1.2 between 3 and 0.5 V.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 369: Symposium U – Solid State Ionics IV , 1994 , 131
Copyright
Copyright © Materials Research Society 1995

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