One pot synthesis of poly m-toluidine incorporated silver and silver oxide nanocomposite as a promising electrode for supercapacitor devices

Doaa Essam; Ashour M Ahmed; Ahmed A Abdel-Khaliek; Mohamed Shaban; Mohamed Rabia

doi:10.1038/s41598-024-84848-5

One pot synthesis of poly m-toluidine incorporated silver and silver oxide nanocomposite as a promising electrode for supercapacitor devices

Sci Rep. 2025 Jan 21;15(1):2698. doi: 10.1038/s41598-024-84848-5.

Authors

Doaa Essam^{1

2

3}, Ashour M Ahmed^{4

5}, Ahmed A Abdel-Khaliek⁶, Mohamed Shaban⁷, Mohamed Rabia⁸

Affiliations

¹ Nanomaterials Science Research Laboratory, Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt. [email protected].
² Physical Chemistry Laboratory, Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef, 62514, Egypt. [email protected].
³ Nanophotonics and Applications Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef, 62514, Egypt. [email protected].
⁴ Physics Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), 11623, Riyadh, Saudi Arabia.
⁵ Nanophotonics and Applications Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef, 62514, Egypt.
⁶ Physical Chemistry Laboratory, Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef, 62514, Egypt.
⁷ Physics Department, Faculty of Science, Islamic University of Madinah, P. O. Box: 170, 42351, Al Madinah Al Monawara, Saudi Arabia.
⁸ Nanomaterials Science Research Laboratory, Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt.

PMID: 39837976
DOI: 10.1038/s41598-024-84848-5

Abstract

The design and fabrication of novel electrodes with strong electrochemical responses are crucial in advanced supercapacitor technology. In this study, a poly(m-toluidine)/silver-silver oxide (PMT/Ag-Ag₂O) nanocomposite was prepared using the photopolymerization method. Various characterization techniques were employed to analyze the prepared nanomaterials. The resulting structure of Ag-Ag₂O minimizes ion diffusion distances, increases active sites, and accelerates redox reactions. The electrochemical response of PMT and PMT/Ag-Ag₂O electrodes was evaluated in three different electrolyte solutions (Na₂SO₄, H₂SO₄, and HCl). The specific capacitance of PMT/Ag-Ag₂O nanocomposite was found to be higher than that of PMT alone. Among the tested electrolytes, HCl exhibited the highest specific capacitance of 443 F g^-1 at a gravimetric current density of 0.4 A g^-1, surpassing H₂SO₄ (104 F g^-1) and Na₂SO₄ (32 F g^-1). Also, the PMT/Ag-Ag₂O nanocomposite has demonstrated good cycling stability. It exhibited a high specific power density of 156 W Kg^-1 and a specific energy density of 1.8 Wh Kg^-1. These results highlight the potential of the prepared PMT/Ag-Ag₂O nanocomposite as a nanoelectrode material for high-performance supercapacitors.

Keywords: Ag-Ag2O; Poly (m-tolidine); Pseudocapacitor; Specific capacitance; Specific energy density.