Naslov
Influence of Antimony on the Properties of the Anodic Oxide Layer Formed on Pb-Sb Alloys

Autori
Metikoš-Huković, Mirjana ; Babić, Ranko ; Brinić, Slobodan

Izvornik
Journal of Power Sources (0378-7753) 64 (1997), 1-2; 13-19

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
lead; lead-antimony alloys; lead/acid batteries; impedance spectroscopy

Sažetak
Electric and dielectric properties, changes in structure and kinetics of formation and reduction of anodic phase layers on Pb and Pb-Sb electrodes in H_2SO_4, have been studied by means of electrochemical and structure characterizing impedance spectroscopy methods. The results obtained were discussed with respect to the effectiveness of Sb on the solid-state PbO--> PbO_n and PbO-->PbO_2 transformations. It is found that Sb facilitates the appearance of a potential region in which non-stoichiometric mixed oxides are formed ; it has a catalytic effect on the Pb0 into the Pb O_2 transformation. The formation of the mixed oxide leads to a shift in the potential of the oxidation of PbSO_4, to PbO_2 of about 200 mV in comparison with the pure-Pb electrode. It seems that the observed effects could explain why Sb prolongs the positive plate cycle life. It was shown that the electrochemical impedance spectroscopy is a very sensitive and suitable method for in situ investigation of solid-state processes in the positive lead/acid battery plate.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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