Exploring the Potential of Nitrogen-Doped Graphene in ZnSe-TiO2 Composite Materials for Supercapacitor Electrode

Hassan Akbar; Asghar Ali; Shoaib Mohammad; Faiza Anjum; Ashfaq Ahmad; Amir Muhammad Afzal; Munirah D Albaqami; Saikh Mohammad; Jeong Ryeol Choi

doi:10.3390/molecules29092103

Exploring the Potential of Nitrogen-Doped Graphene in ZnSe-TiO₂ Composite Materials for Supercapacitor Electrode

Molecules. 2024 May 2;29(9):2103. doi: 10.3390/molecules29092103.

Authors

Hassan Akbar¹, Asghar Ali², Shoaib Mohammad³, Faiza Anjum², Ashfaq Ahmad⁴, Amir Muhammad Afzal⁵, Munirah D Albaqami⁶, Saikh Mohammad⁶, Jeong Ryeol Choi⁷

Affiliations

¹ Department of Physics, Abbottabad University of Science and Technology (AUST), Havelian Havelian, Abbottabad 22500, Pakistan.
² Pakistan Department of Physics, The University of Lahore, 1-km, Defense Road, Lahore 54000, Pakistan.
³ Department of Mechanical Engineering, University of Engineering and Applied Sciences, Swat 19201, Pakistan.
⁴ School of Material Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, China.
⁵ Pakistan Department of Physics, Riphah International University, Lahore 54000, Pakistan.
⁶ Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.
⁷ School of Electronic Engineering, Kyonggi University, Yeongtong-gu, Suwon 16227, Gyeonggi-do, Republic of Korea.

Abstract

The current study explores the prospective of a nitrogen-doped graphene (NG) incorporated into ZnSe-TiO₂ composites via hydrothermal method for supercapacitor electrodes. Structural, morphological, and electronic characterizations are conducted using XRD, SEM, Raman, and UV analyses. The electrochemical study is performed and galvanostatic charge-discharge (GCD) and cyclic voltammetry (CV) are evaluated for the supercapacitor electrode material. Results demonstrate improved performance in the ZnSe-NG-TiO₂ composite, indicating its potential for advanced supercapacitors with enhanced efficiency, stability, and power density. Specific capacity calculations and galvanic charge-discharge experiments confirmed the promising electrochemical activity of ZnSe-NG-TiO₂, which has a specific capacity of 222 C/g. The negative link among specific capacity and current density demonstrated the composite's potential for high energy density and high-power density electrochemical devices. Overall, the study shows that composite materials derived from multiple families can synergistically improve electrode characteristics for advanced energy storage applications.

Keywords: N doped graphene; TiO2; ZnSe; energy storage; nanocomposite; supercapacitor.

Grants and funding

This work received funding from the Researchers Supporting Project Number (RSP2024R267) at King Saud University in Riyadh, Saudi Arabia. We also extend our gratitude to the National Research Foundation of Korea (NRF), supported by the Korean government’s Ministry of Science and Information Technology (MSIT) (No.: NRF-2021R1F1A1062849).