Improvement of Supercapacitor Performance of In Situ Doped Laser-Induced Multilayer Graphene via NiO

Nagih M Shaalan; Shalendra Kumar; Faheem Ahmed; Nishat Arshi; Saurabh Dalela; Keun Hwa Chae

doi:10.3390/nano13142081

Improvement of Supercapacitor Performance of In Situ Doped Laser-Induced Multilayer Graphene via NiO

Nanomaterials (Basel). 2023 Jul 16;13(14):2081. doi: 10.3390/nano13142081.

Authors

Nagih M Shaalan^{1

2}, Shalendra Kumar^{1

3}, Faheem Ahmed¹, Nishat Arshi⁴, Saurabh Dalela⁵, Keun Hwa Chae^{6

7}

Affiliations

¹ Department of Physics, College of Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi Arabia.
² Physics Department, Faculty of Science, Assiut University, Assiut 71516, Egypt.
³ Department of Physics, School of Engineering, University of Petroleum & Energy Studies, Dehradun 248007, India.
⁴ Department of Basic Sciences, Preparatory Year Deanship, King Faisal University, P.O. Box 400, Al-Ahsa, 31982, Saudi Arabia.
⁵ Department of Pure & Applied Physics, University of Kota, Kota 324005, India.
⁶ Beamline Research Division, Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang 37673, Republic of Korea.
⁷ Advanced Analysis & Data Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea.

Abstract

Herein, we have reported a novel strategy for improving the electrochemical performance of laser-induced graphene (LIG) supercapacitors (SCs). The LIG was prepared using a CO₂ laser system. The polyimide polymer was the source material for the fabrication of the LIG. The doping process was performed in situ using the CO₂ laser, which works as a rapid thermal treatment to combine graphene and NiO particles. NiO was used to improve the capacitance of graphene by combining an electric double-layer capacitor (EDLC) with the pseudo-capacitance effect. The high-resolution transmission electron microscopy, energy-dispersive X-ray spectroscopy, and Raman spectroscopy showed that the structure of the LIG is multilayered and waved. The HRTEM image proves the distribution of NiO fine particles with sizes of 5-10 nm into the graphene layers. The electrochemical performance of the as-prepared LIG was tested. The effect of the combination of the two materials (oxide and carbon) was investigated at different concentrations. The LIG showed a specific capacitance of 69 Fg^-1, which increased up to 174 Fg^-1 for the NiO-doped LIG. The stability investigations showed that the electrodes were very stable for more than 1000 cycles. This current study establishes an innovative method to improve the electrochemical properties of LIG.

Keywords: NiO-doped graphene; electrochemical properties; laser-induced graphene; supercapacitor.

Grants and funding

INSTR002/The authors extend their appreciation to the Deputyship for Research & Innovation, Ministry of Education in Saudi Arabia for funding this research work through project number INSTR002.