Influence of the alkaline electrolyte on the behavior of Na0.6CoO2 used as conductive additive in positive electrode of Ni-MH cells
DOUIN, Myriam
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Direction de la recherche
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Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Direction de la recherche
DOUIN, Myriam
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Direction de la recherche
< Reduce
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Direction de la recherche
Language
en
Article de revue
This item was published in
Journal of The Electrochemical Society. 2008, vol. 155, n° 12, p. A945-A951
Electrochemical Society
English Abstract
The influence of the electrolyte alkaline ions, potassium, lithium, and sodium, on the efficiency of the Na0.6CoO2 phase, as a conductive additive in the positive nickel oxide electrode, is analyzed in the present paper. ...Read more >
The influence of the electrolyte alkaline ions, potassium, lithium, and sodium, on the efficiency of the Na0.6CoO2 phase, as a conductive additive in the positive nickel oxide electrode, is analyzed in the present paper. Aging tests of the Na0.6CoO2 phase and of the gamma-Co phases, deriving from it, in the three electrolyte components, KOH, NaOH, and LiOH, have shown the presence of topotactic exchange/(de)intercalation reactions of the alkaline ions, occurring within the materials. Electrochemical tests, performed in the various electrolytes, underline an unfavorable effect of lithium ions. The formation of a semiconductive LixCoO2 phase has been identified as responsible for the loss of efficiency of the conductive material, when lithium ions are present in the electrolyte.Read less <
English Keywords
Inorganic compounds
Cells
Electrolyte
Alkaline ions
Nickel
Origin
Hal imported