Structural Transformations of the PbO2 Active Material during Cycling

Simon, Adam C.; Caulder, S. M.; Stemmle, J. T.

doi:10.1149/1.2134240

Cited by 41 publications

(2 citation statements)

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“…Therefore, the reduction charge of PbO 2 formed at 1.7 and 1.8 V in the Mn-containing electrolyte and the regarding effect of manganese could not be measured precisely. However, comparing peak C1 in the voltammograms of Figure 16indicates Simon et al 40 showed that a small amount of PbO 2 is usually found within the lead sulfate after the discharge process. However, it can be assumed that this PbO 2 amount is negligible compared to the amount of PbO 2 reduced during the potential scan.…”

Section: Potentiostatic-lsv Studiesmentioning

confidence: 83%

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Corrosion Assessment of a Lead-Based Composite in Sulfuric Acid Electrolytes

2016

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In this study, corrosion performances of the Pb-MnO 2 composite in a sulfuric acid electrolyte solution at a wide range of anodic potentials were investigated. The regarding effects of manganese ions as an additive to the electrolyte were also studied. An industrially-supplied PbAg alloy was examined in some cases and the obtained results were used as benchmarks for comparison. Oxidation of these materials and properties of the formed anodic layers were examined using electrochemical techniques including electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), potentiostatic polarization and linear sweep voltammetry (LSV). Scanning electron microscopy (SEM), X-ray diffraction (XRD) and Raman spectroscopy were employed to characterize the anodic layers. The presence of MnO 2 particles in the Pb-MnO 2 caused the open circuit potential of lead to increase from the PbSO 4 potential region to the PbO potential region, contributing to different composition of the anodic layer and higher charge transfer resistances of the corrosion layer in comparison with those of the PbAg alloy. The charge transfer resistance of the composite increased with potential within the PbO/PbSO 4 potential region. At the PbO 2 potential region, the Pb-MnO 2 composite anode showed a larger amount of PbO 2 in the corrosion layer than the PbAg alloy in the Mn-free electrolyte. The presence of manganese ions inhibited the formation of PbO 2 on the anodes, an effect that was more significant on the composite anode. Regardless of the electrolyte composition, the amount of PbO 2 corrosion product on the composite anode increased with the polarization time and the applied potential.

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Section: Potentiostatic-lsv Studiesmentioning

confidence: 83%

“…Although a small portion of PbO 2 might not be reduced during this peak, 40 peak III can be used to compare the amount of PbO 2 corrosion product formed on the anodes during the forward scan direction.…”

Section: Cyclic Voltammetry Studymentioning

confidence: 99%