Corresponding Author

Dong SHU(dshu@scnu.edu.cn)


Surface reaction processes of Pb electrodes were investigated in H2SO4 and Na2SO4 solutions by LSV, CV and EQCM. The results in the voltammogram and the mass change curve of the Pb electrode indicated that the oxide products of lead included PbSO4 and PbO·PbSO4 in sulfuric acid solution with a positive-going potential scan from -1.0 V to -0.4 V and then PbO·PbSO4 transformed into PbSO4. However, the oxide product of lead was only PbSO4 in sodium sulfate solution. The experimental results revealed that the acid solution is necessary for the formation of PbO·PbSO4 and the negative discharge mechanism of lead-acid batteries was suggested. This study had also provided a new research method for the negative plates of lead-acid battery.

Graphical Abstract


lead-acid battery, electrochemical quartz crystal microbalances, cyclic voltammetry, Pb electrode

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