Degradation of sodium. beta. ''-alumina: effect of microstructure

Journal Article · Sun May 01 04:00:00 EDT 1983 · J. Electrochem. Soc.; (United States)

OSTI ID:6925360

Buechele, A C; De Jonghe, L C; Hitchcock, D

The effect of microstructure on failure initiation of sodium beta''-alumina solid electrolytes has been investigated by acoustic emission detection. Mode I failure initiation follows Weibull statistics with a modulus of about 2.5. The observed average critical current densities were 145 and 640 mA/cm/sup -2/ for large and for small grained electrolytes, respectively. Nonuniform secondary current distributions near the electrode edges were considered and were found to lead to minor corrections to these values. The conditions under which nonuniformity of current would affect failure statistics are considered. Considerations of failure statistics indicate conditions where proof testing may be necessary to achieve sufficient reliability. These considerations assume complete equivalence between mechanical and electrolytic failure; the indication is, however, that such equivalence is not valid.

• Research Organization: Lawrence Berkeley Lab., CA
• OSTI ID: 6925360
• Journal Information: J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 130:5; ISSN JESOA
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250903* -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
36 MATERIALS SCIENCE
360603 -- Materials-- Properties
ALKALI METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
CRYSTAL STRUCTURE
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTROLYTES
FAILURES
LITHIUM COMPOUNDS
LITHIUM OXIDES
METAL-NONMETAL BATTERIES
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
SODIUM COMPOUNDS
SODIUM OXIDES
SODIUM-SULFUR BATTERIES
SOLID ELECTROLYTES