ZnFe2O4 Nanoparticles Supported on Graphene Nanosheets for High-Performance Supercapacitor

• Published in: Journal of electronic materials Vol. 52; no. 4; pp. 2676 - 2684
• Main Authors: Lakra, Rajan, Mahender, C., Singh, Balwant Kr, Kumar, Rahul, Kumar, Sandeep, Sahoo, Prasanta Kumar, Thatoi, Dhirendranath, Soam, Ankur
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-04-2023; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Efficiency; Electrochemical analysis; Electrochemical impedance spectroscopy; Electrodes; Electronics and Microelectronics; Energy; Graphene; Instrumentation; Materials Science; Metal oxides; Morphology; Nanocomposites; Nanoparticles; Nanosheets; Optical and Electronic Materials; Original Research Article; Oxidation; Polyvinyl alcohol; Raman spectroscopy; Scanning electron microscopy; Solid State Physics; Supercapacitors; Voltammetry; Zinc ferrites; nanocomposite; Zinc ferrite; graphene; supercapacitor
• ISSN: 0361-5235; 1543-186X
• DOI: 10.1007/s11664-023-10230-2

The present work includes the synthesis and characterization of zinc ferrite (ZnFe
2
O
4
)
/
graphene nanosheets composite as electrodes for supercapacitor application. The structural properties were studied using x-ray diffraction and Raman spectroscopy. The synthesized electrode was further analyzed with scanning electron microscopy (SEM) and transmission electron microscopy for surface morphology, which confirm the particle adherences between ZnFe
2
O
4
nanoparticles and graphene nano-sheets. The SEM images also confirmed a highly porous structure leading to excellent ion transportability, and a larger surface area for high amounts of charge storage. The device performance of the ZnFe
2
O
4
/
graphene nanosheets as electrodes was tested via electrochemical analysis, cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy. The device exhibited excellent capacitive performance with a specific capacitance of 789.2 Fg
−1
calculated at a 5-mV/s
−1
scan rate.