Mechanism of the processes during anodic oxidation of a lead electrode in sulfuric acid solutions

Journal Article · Mon Oct 01 04:00:00 EDT 1984 · Proc. - Electrochem. Soc.; (United States)

OSTI ID:5460761

Pavlov, D

The 2.5V range within which the lead-acid battery operates is divided into three separate lead electrode systems. During passivation of the Pb/PbSO/sub 4/ electrode, the electrolyte in the pores of the PbSO/sub 4/ layer is alkalized, and at potentials more positive than -0.4V the Pb/PbO/PbSO/sub 4//H/sub 2/SO/sub 4/ electrode system is formed. At potentials more positive than +0.95V in the dark, following a semiconductor mechanism, PbO is oxidized first to PbO /SUB n/ , and then to ..cap alpha..-PbO/sub 2/. When ..cap alpha..-PbO/sub 2/ comes into contact with the bulk of the H/sub 2/SO/sub 4/, the PbSO/sub 4/ crystals are oxidized to ..beta..PbO/sub 2/.

• Research Organization: Central Laboratory of Electrochemical Power Sources, Bulgarian Academy of Sciences, Sofia
• OSTI ID: 5460761
• Journal Information: Proc. - Electrochem. Soc.; (United States), Journal Name: Proc. - Electrochem. Soc.; (United States) Vol. 84-14; ISSN PESOD
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250902* -- Energy Storage-- Batteries-- Performance & Testing
250903 -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
CHALCOGENIDES
CHEMICAL REACTIONS
CORROSION
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTROCHEMICAL CORROSION
ELECTRODES
ELEMENTS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
LEAD
LEAD COMPOUNDS
LEAD OXIDES
LEAD SULFATES
LEAD-ACID BATTERIES
METALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PASSIVITY
SULFATES
SULFUR COMPOUNDS
SULFURIC ACID