cell was the best, and that of the platinum was the worst.2. The main components of the exhaust gas were nitrogen and hydrogen. A little ammonia was detected when the operating temperature was 60~ 3. The hydrogen content of the exhaust gas decreases and fuel efficiency increases in accordance with increases in the current density. At a high current density, it is presumed that hydrogen which is produced by side reaction is caught by the anode and is used for further reaction.4. The hydrogen content of the exhaust gas increases and fuel efficiency decreases with increasing hydrazine concentration. It seems that the decomposition of hydrazine which is not used effectively for electrochemical reaction increases with increasing hydrazine concentrations.5. The hydrogen in exhaust gas increases and fuel efficiency decreases with increasing cell temperatures. ABSTRACTResin-bonded paper separators suffer some loss of crystalline material on extended storage in battery grade H2SO4. Similar separators from cycled batteries suffer order of magnitude losses of crystallinity. Scanning electron microscopy has found Pb-salts of two kinds; those grown in regions of high and low supersaturation. The latter often obtain crystal dimensions larger than 30~. Comparison with other separator materials used in Pb/acid batteries has led to a model of separator failure based on mechanical abrasion, fluid motion, and crystallization in large pores. The separator matrix is weakened by brittle fracture of the fiber network, accompanied by minor hydrolytic loss of material. These lead in turn to pore enlargement that can enhance the growth of large, well-ordered crystals. A somewhat speculative mechanism for perforation failure of large-pored separators is given. * Electrochemical Society Active Member.
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