Naslov
EIS-in Situ Characterization of Anodic Films on Antimony and Lead-Antimony Alloys

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

Izvornik
Journal of power sources (0378-7753) 157 (2006); 563-570

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

Ključne riječi
Antimony; Lead-antimony alloys; Lead-acid batteries; Electrochemical impedance spectroscopy.

Sažetak
The behavior of antimony as a function of the concentration of both H_2SO_4 and HSO_4^-ions, and the electrode rotation rate was studied by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The rate of antimony dissolution is accelerated with the addition of HSO_4^- ions and with the increasing electrode rotation rate. Impedance measurements of antimony in the region of film formation, and lead and lead-antimony alloys in the region of PbO formation showed that the dissolution rate is controlled by the diffusion through the oxide layer. The diffusion coefficients (D) for protons in the case of antimony dissolution, and for oxygen ions in the case of lead and alloys, were estimated. Electric and dielectric properties of the anodic surface layer of the lead-antimony alloys are significantly influenced by the antimony content.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo

POVEZANOST RADA