THE EFFECT OF ION SUBSTITUTION IN SODIUM-CONDUCTING SOLID ELECTROLYTES ON THE REVERSIBILITY OF THE ELECTRODE-SOLID ELECTROLYTE INTERFACE

Authors
BUKUN NG MOSKVINA EI
Citation
Ng. Bukun et Ei. Moskvina, THE EFFECT OF ION SUBSTITUTION IN SODIUM-CONDUCTING SOLID ELECTROLYTES ON THE REVERSIBILITY OF THE ELECTRODE-SOLID ELECTROLYTE INTERFACE, Solid state ionics, 86-8, 1996, pp. 107-111
Citations number
13
Categorie Soggetti
Physics, Condensed Matter","Chemistry Physical
Journal title
Solid state ionics → ACNP
ISSN journal
01672738
Volume
86-8
Year of publication
1996
Part
1
Pages
107 - 111
Database
ISI
SICI code
0167-2738(1996)86-8:<107:TEOISI>2.0.ZU;2-Q
Abstract
The reversibility of the sodium-cobalt bronze NaxCoO2 interface with a solid sodium-conducting NASICON-type electrolyte is studied by means of the electrochemical impedance method. Also studied were electrolyte s of two compositions, a stoichiometric one, Na3Zr2Si2PO12 (I) and tha t doped with cobalt oxide, Na3.06Zr1.94Co0.06Si2PO12 (II). The experim ental temperature was 22+/-1 degrees C. The exchange current of the el ectrode reaction, Na-e(-) = Na+ was found to increase by almost a deca de for the doped electrolyte II (33 for I and 236 mu A/cm(2) for II). This effect can be related to the electrocatalytic effect of Co2+ cati ons.