Reaction Mechanisms Study of Pb Electrodes in Sulfuric Acid and Sodium Sulfate Solutions by EQCM

Authors

Xian-ping ZOU, School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China;
Zong-xuan KANG, School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China;
Yu-lan HUANG, School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China;
Dong SHU, School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China;Guangzhou Laboratory of Materials for Energy Conversion and Storage, Guangzhou 510006, China;Engineering Research Center of Electrochemical Materials and Technology on Energy Storage, Ministry of Education, Guangzhou 510006, China;Follow
Ya-yun ZHONG, School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China;
Jun-nan HAO, School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China;
Yu-qing LIAO, School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China;

Corresponding Author

Dong SHU(dshu@scnu.edu.cn)

Abstract

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

Keywords

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

DOI Link

https://doi.org/10.13208/j.electrochem.150126

Publication Date

2015-08-28

Online Available Date

2015-08-28

Revised Date

2015-04-09

Received Date

2015-01-26

Recommended Citation

Xian-ping ZOU, Zong-xuan KANG, Yu-lan HUANG, Dong SHU, Ya-yun ZHONG, Jun-nan HAO, Yu-qing LIAO. Reaction Mechanisms Study of Pb Electrodes in Sulfuric Acid and Sodium Sulfate Solutions by EQCM[J]. Journal of Electrochemistry, 2015 , 21(4): 362-367.
DOI: 10.13208/j.electrochem.150126
Available at: https://jelectrochem.xmu.edu.cn/journal/vol21/iss4/9

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