Controlling the corrosion and hydrogen gas liberation inside lead-acid battery via PANI/Cu-Pp/CNTs nanocomposite coating

• Published in: Scientific reports Vol. 11; no. 1; p. 9507
• Main Authors: Deyab, M. A., Mohsen, Q.
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 04-05-2021; Nature Publishing Group; Nature Portfolio
• Subjects: 639/301; 639/638; 639/638/161; Coatings; Corrosion; Electrochemistry; Humanities and Social Sciences; Hydrogen; Lead; Microscopy; multidisciplinary; Nanocomposites; Nanotechnology; Nanotubes; Polymers; Porphyrins; Scanning electron microscopy; Science; Science (multidisciplinary); Spectroscopy; Transmission electron microscopy; X-ray diffraction
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-021-88972-4

The liberation of hydrogen gas and corrosion of negative plate (Pb) inside lead-acid batteries are the most serious threats on the battery performance. The present study focuses on the development of a new nanocomposite coating that preserves the Pb plate properties in an acidic battery electrolyte. This composite composed of polyaniline conductive polymer, Cu-Porphyrin and carbon nanotubes (PANI/Cu-Pp/CNTs). The structure and morphology of PANI/Cu-Pp/CNTs composite are detected using transmission electron microscopy (TEM), scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis. Based on the H
2
gas evolution measurements and Tafels curves, the coated Pb (PANI/Cu-Pp/CNTs) has a high resistance against the liberation of hydrogen gas and corrosion. Electrochemical impedance spectroscopy (EIS) results confirm the suppression of the H
2
gas evolution by using coated Pb (PANI/Cu-Pp/CNTs). The coated Pb (PANI/Cu-Pp/CNTs) increases the cycle performance of lead-acid battery compared to the Pb electrode with no composite.