Lead oxide/carbon black composites prepared with a new pyrolysis-pickling method and their effects on the high-rate partial-state-of-charge performance of lead-acid batteries

•New pyrolysis-pickling method was developed to make PbO/carbon black (CB) additive.•Pyrolysis-pickling processing increases alkaline surface groups on CB.•PbO/CB composites can effectively inhibit the H2 evolution in negative plates.•PbO/CB composites with lower PbO content increase HRPSoC cycle li...

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