Method of improving the formation efficiency of positive...

Details Method of improving the formation efficiency of positive... Method of improving the formation efficiency of positive...

H - Electricity

01

M

319/79

H01M 4/22 (2006.01) H01M 4/20 (2006.01) H01M 4/21 (2006.01)

Patent

CA 1283699

METHOD OF IMPROVING THE FORMATION EFFICIENCY OF POSITIVE PLATES OF A LEAD-ACID BATTERY ABSTRACT OF THE DISCLOSURE The formation efficiency of passed positive plates of a lead-acid battery is greatly enhanced by providing in situ a layer of lead dioxide (PbO2) on the pasted plate surfaces prior to formation. The PbO2 layer is preferably formed by treating the surfaces of the plates with an ozone-enriched gas to convert a portion of the poorly conductive positive active precursor material (nPbO?PbSO4) to electrically conductive PbO2. In subsequent electrochemical formation of the plates, the total formation charge can be reduced significantly while obtaining more complete conversion of the paste to positive active material. The method also provides an effective substitute for conventional curing of pasted positive plates.

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