Forum Discussion
BFL13
Oct 11, 2020Explorer II
pianotuna wrote:
PbO2+Pb+2H2SO4 -- ChargeDischarge -- 2PbSO4+2H2
BFL13,
If I am reading that chemical equation correctly Hydrogen is produced on discharge.
From;
https://www.sciencedirect.com/topics/engineering/sealed-battery
The link says the last part is "2H2O" not "2H2" but it is confusing.
My Battery Bible--
http://www.bestconverter.com/Books_c_67.html
just says that on discharge, " the hydrogen ions in the electrolyte move to the positive plates and combine with the oxygen to form water---"
on recharging, "the positively charged hydrogen ions are attracted to the negative plates where the hydrogen combines with the lead sulfate to form lead and sulfuric acid. When most of the lead sulfate is converted to lead, hydrogen bubbles form at the negative plates and rise through the electrolyte.....oxygen appears at the postive plate when this process is near completion. the formation of the gas indicates the battery is nearing complete charge..."
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