DEVELOPMENT OF NI-H2 CELLS OF INDIVIDUAL PRESSURE-VESSEL FOR SPACECRAFT APPLICATIONS .2. EVALUATION OF NEWLY PREPARED INORGANIC FIBER MATTED SEPARATOR

As a part of the development of 35Ah individual-pressure-vessel-type N i-H-2 cells for space use, the inorganic separators of matted zirconia mixed with asbestos fibers were fabricated and evaluated. To improve both the durability against the cell stack assembling and the retainab ility of KOH electrolyte during a large number of charge/discharge cyc lings of deep depth of discharge, the mat of 80 wt% zirconia fibers an d 20 wt% asbestos fibers with a small amount (about 4 wt%) of butyl la tex binder is obtained to be a most suitable separator for the Ni-H-2 cells.