Development of Zinc Electrodes and Inorganic Separators for Large Size Silver-Zinc Batteries.

摘要

During the nineteen month period of this contract both 40Ahr and 850Ahr (NR-1) size silver-zinc cells were designed, fabricated and tested to evaluate improved zinc electrode structures and inorganic separators developed by ERC. The 40Ahr cell groups have completed cycling and have achieved 150-300 cycles depending on the cell construction. The NR-1 batteries have completed 150-300 days of testing on both float and deep discharge regimes with the testing continuing. Three NR-1 and three DSRV (525Ahr) cells have been fabricated with the most promising design and have been delivered to NAD-Crane for life test evaluation. The most promising design from data obtained in both 40Ahr and 850Ahr cells appears to be a combination of FSC and ERC 2002 inorganic separator with KT separator on the negative electrode. The various negative plate additives investigated did improve performance in cells with FSC separators but did not show an additional improvement when tested in cells with inorganic and FSC separators in combination.