China Nonferrous Metallurgy

Lead oxide from waste lead paste can be directly used as active material for lead battery electrode, but its overall electrical performance is often not very well compared with ball-malled lead powder. In the paper, a new nanosized lead sulfate/acetylene black (PbSO4@Pb/AB) composite was prepared by microwave method as a negative electrode active additive for recovery of lead oxide from spent lead-acid batteries, and the physical and chemical properties and the performance of the lead-acid battery were systematically studied. The results showed compared with AB and AAB black, PPA composite used as additive could greatly improve the performance of batteries made from the recovery of lead powder, effectively maintain the HRPSoC cycle performance of the lead-acid battery made of recycled lead powder, and greatly improve its battery discharge capacity; the HRPSoC cycle life (11551 times) of 3.0wt% lead sulfate and acetylene black composite cell was 3.9 times longer than that (2960 times) of blank battery, in particular, 0.2C discharge capacity was about 942.5mAh, 9.9 times that(94.8mAh) of blank battery.