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Performance of sodium-beta alumina solid electrolyte in Na/S cells

Conference ·
OSTI ID:6336743
The performance of sodium-beta alumina type solid electrolytes is limited by degradation. Two different modes of degradation are discussed. Mode I involves the well studied current focusing on a pre-existing surface flaw; Mode II involves internal sodium precipitation and possible microfracture. The second mode can be activated when a gradient in transport number ratios has been created by chemical reduction of the electrolyte by the sodium electrode. The implications of the degradation for cell operation are discussed.
Research Organization:
Lawrence Berkeley Lab., CA (USA); California Univ., Berkeley (USA). Dept. of Materials Science and Mineral Engineering
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
6336743
Report Number(s):
LBL-12657; CONF-810812-18; ON: DE81023030
Country of Publication:
United States
Language:
English

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Related Subjects

25 ENERGY STORAGE
250903* -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
COMMINUTION
DEFECTS
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTROLYTES
FAILURES
FRACTURING
METAL-NONMETAL BATTERIES
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
SODIUM-SULFUR BATTERIES
SOLID ELECTROLYTES