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Structure and Ionic Conductivity of Lithio-Borate Thin Films

Published online by Cambridge University Press:  28 February 2011

P. Dzwonkowski ,
M. Eddrief ,
C. Julien  and
M. Balkanski
P. Dzwonkowski
Affiliation:
Laboratoire de Physique des Solies, associé au CNRS Université P. et M.Curie, 4 place Jussieu, 75252 Paris Cedex 05, France
M. Eddrief
Affiliation:
Laboratoire de Physique des Solies, associé au CNRS Université P. et M.Curie, 4 place Jussieu, 75252 Paris Cedex 05, France
C. Julien
Affiliation:
Laboratoire de Physique des Solies, associé au CNRS Université P. et M.Curie, 4 place Jussieu, 75252 Paris Cedex 05, France
M. Balkanski
Affiliation:
Laboratoire de Physique des Solies, associé au CNRS Université P. et M.Curie, 4 place Jussieu, 75252 Paris Cedex 05, France
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Abstract

Thin films of vitreous solid electrolyte in the boron-oxide/lithium oxide system have been grown using a thermal evaporation technique. Solid electrolyte films of composition B2O3-xLi2O with 0.5≤x≤5 are obtained from a mixture of lithium metaborate and lithium oxide in good proportion. Structure and ionic conduction are studied as a function of the glass modifier concentration and process conditions. The structure is investigated by the mid-infrared absorption spectroscopyof films deposited on a silicon wafer. Comparison with bulk materials whose structures are known shows that the films have a similar structure, and exhibit the transformation of boroxol rings into triborate or di-triborate units as the Li2O concentration increases. The ionic conductivity has been studied over wide frequency and temperatureranges using the complex impedance spectroscopy in a sandwiched geometry. The ionic conductivity increases with increasing Li content and exhibits a maximum value for B2O3-3Li2O.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 210: Symposium L – Solid State Ionics II , 1990 , 633
Copyright
Copyright © Materials Research Society 1991

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