Sodium batteries designated as sodium/beta'-alumina/molten salt have been studied for electric vehicle and load leveling applications. Several kinds of this type batteries were proposed such as Na/SbCl3, Na/SCl4, Na/SeCl4, Na/NiCl2,Na/FeCl2. These cells usually utilize AlCl3-NaCl melts. The pretreatment of the beta'-alumina often influences on the charge-discharge behaviour of these cells, especially when the acidic chloroaluminate melt is utilized. The polarisation at two interfaces, between beta'-alumina and liquid sodium and between beta'-alumina and the molten salt, should be reduced to improve the charge discharge properties. In this paper, the effects of the surface conditions of alumina and the acidity of molten salt have been studied by ac impedance spectroscopy to clarify the polarization mechanism at the interface between beta'-alumina and AlCl3-NaCl melts.
Polarization phenomena at beta''-alumina/molten salt interface
Polarisationserscheinungen an der Grenzfläche von beta''-Aluminiumoxid/Salzschmelze
1996
7 Seiten, 9 Bilder, 15 Quellen
Conference paper
English
NTRS | 1985
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