Work

Sulfur-Modified Co 3 O 4 –Graphene Nanocomposites for High-Performance Supercapacitor Applications

Year: 2025

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide The development of high-performance electrode materials is crucial for advancing supercapacitor technology. This work presents a sulfur-doped cobalt oxide–reduced graphene oxide (S-doped Co 3 O 4 –rGO) nanocomposite directly synthesized on nickel foam via a facile hydrothermal method and subsequent annealing. Comprehensive characterization (XRD, Raman, FTIR, XPS, FE-SEM, and TEM) confirmed successful synthesis and uniform dispersion of components. Electrochemical evaluation revealed exceptional performance: the S–Co 3 O 4 –rGO electrode achieved a specific capacitance of 856.8 F/g at 2 A/g, significantly surpassing that of pure Co 3 O 4 (198.8 F/g) and undoped Co 3 O 4 –rGO (580 F/g). Furthermore, it demonstrated outstanding long-term stability, retaining 97.5% of its initial capacitance after 5000 charge–discharge cycles at 5 A/g. The synergistic effect between the sulfur-doped graphene network and cobalt oxide nanoparticles is identified as the primary factor enabling this superior capacitance and durability, positioning this nanocomposite as a highly promising candidate for next-generation energy storage devices.

Source: ACS Omega

DOI: 10.1021/acsomega.5c06305

Authors: Fatemeh Hedayati, Maisam Jalaly, Samira Mohammadi, Seyed Morteza Mousavi-Khoshdel

Institution: Iran University of Science and Technology

Language: English

Topic: Supercapacitor Materials and Fabrication

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: gold

Estimated APC paid: $1,935