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Investigation of high temperature battery systems. Final report, 1 Jul 1974--31 Aug 1975. [10A for 2h, 100 cycles, 110 W/kg and 110 Wh/kg]

Technical Report ·
OSTI ID:7138223
; ; ;
Hermetically sealed sodium--sulfur cells intended to operate at 300 C in atmospheric environment and to deliver 10 A for 2 hr above 1.0 V for 100 cycles with a specific power and specific energy of 110 W/kg and 110 Wh/kg were designed and fabricated. The cells were to withstand five thermal cycles from operating temperature to room temperature without loss of electrical performance. These cells utilized a disk-shaped magnesium oxide-enriched ..beta..-alumina electrolyte with low-cost materials for cell containers. The seals used in the cell were all based on state-of-the-art technology and comprised a glass sealant between the ..beta..-alumina electrolyte and the ..cap alpha..-alumina rings, copper braze between the ..cap alpha..-alumina rings and the Kovar cell containers, and laser welds between the Kovar cell containers and the stainless steel cell cover. Chromium plasma coating was used to protect the copper braze and Kovar against corrosion by sulfur and/or sodium polysulfide. No catastrophic cell failure due to cell design or materials of construction has been observed during testing of a cell for over 800 hr. (GRA)
Research Organization:
TRW Systems Group, Redondo Beach, Calif. (USA)
OSTI ID:
7138223
Report Number(s):
AD-A-020164; TRW-26619-6013-RU-00
Country of Publication:
United States
Language:
English

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Related Subjects

25 ENERGY STORAGE
250901* -- Energy Storage-- Batteries-- Design & Development
ALKALI METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CORROSION
DESIGN
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ENERGY STORAGE SYSTEMS
FABRICATION
HIGH TEMPERATURE
METAL-NONMETAL BATTERIES
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE TESTING
SEALS
SODIUM COMPOUNDS
SODIUM SULFIDES
SODIUM-SULFUR BATTERIES
SULFIDES
SULFUR COMPOUNDS
TESTING