IMPROVEMENT OF MANUFACTURE, LIFESPAN, PERFORMANCE AND SAFETY OF SODIUM - SULFUR CELLS DESIGNED FOR STORAGE OF ELECTRIC ENERGY
Changes were made to five aspects of the process for making electrolyte tubes. Improvements to the process for producing beta-alumina led to an increase in electrochemical performances and durability in sodium sulfur cells. As a result of materials research, electrolytic iron and ex-carbonyl nickel powders were chosen for sodium wicks on account of wetting properties and costs. Their behaviour was tested in small standard sodium - sulfur cells, but with two different technologies for the sodium compartment: 1) a lateral wick; 2) the wick located in a central position for transferring sodium from the reservoir to the inside surface of the electrolyte. The first cycles were operated with normal position of the cells and the following cycles with cells upside down. Best results were obtained with a central wick for 105 cycles. A new technology was studied using injection of a preimpregnated wick. Results were promising, but the manufacturing process has to be improved. Some large cells were fitted with sodium wicks: results were good for the first cycle only. Preimpregnated wicks will be used for future development.
Bibliographic Reference: EUR 9261 FR (1984) MF, 92 P., BFR 120, BLOW-UP COPY BFR 460, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989123116700 / Last updated on: 1987-01-01
Available languages: fr