Performance of rechargeable lithium-alloy/metal disulfide pulsepower bipolar batteries

摘要

Recent work in developing and testing large-area cells, multicellstacks, and modules is presented. The molten-salt electrolyte,lithium-alloy/metal disulfide technology was scaled up to 200 cm² cells, and the separator composition was optimized to obtain afinal current of less than 4.5 mA/cm². Performance of singlecells and bipolar stacks was found to match or exceed that of thesmaller-area cells. Five cell stacks have been tested for up to 27 daysat operating temperature with specific energy of 282 kJ/kg for 12pulses, while performance during the last cycle was still 92% of thebest cycle. Completely enclosed modules of 20 bipolar cells havedemonstrated equivalent performance for up to 35 days at a temperatureincluding 13 freeze/thaw cycles