Investigation of the Electrochemical Properties of Ni 0.5 Zn 0.5 Fe 2 O 4 as Binder-Based and Binder-Free Electrodes of Supercapacitors

Bushra Nawaz, Ghulam Ali, Muhammad Obaid Ullah, Sarish Rehman and Fazal Abbas
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Bushra Nawaz: Department of Electronics Engineering, University of Engineering and Technology Taxila, Taxila 47080, Pakistan
Ghulam Ali: U.S.-Pakistan Center for Advanced Studies in Energy (USPCAS-E), National University of Sciences and Technology (NUST), Sector H-12, Islamabad 44000, Pakistan
Muhammad Obaid Ullah: Department of Electronics Engineering, University of Engineering and Technology Taxila, Taxila 47080, Pakistan
Sarish Rehman: Department of Chemistry, McGill University, Montreal, QC H3A 0B8, Canada
Fazal Abbas: College of Arts and Science, University of Chakwal, Chakwal 48800, Pakistan

Energies, 2021, vol. 14, issue 11, 1-11

Abstract: In this work, Ni 0.5 Zn 0.5 Fe 2 O 4 is synthesized as binder-based (NZF) and binder-free electrodes (NZF@NF). The binder-free electrode is directly synthesized on nickel foam via facile hydrothermal techniques. The crystalline phase of both of these electrodes is examined through X-ray diffraction. Their morphology is investigated by scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (TEM), which revealed the well-defined nanostructure with the shape like thin hexagonal platelets. The chemical composition is verified by energy dispersive spectroscopy (EDS). Their electrochemical properties are analyzed by cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS). The NZF@NF electrode has outperformed the binder-based NZF electrode in terms of electrochemical performance owing to the 3D interconnected structure of the nickel foam. The NZF@NF electrode has delivered a high specific capacity of 504 F g −1 at the current density of 1 A g −1 , while its counterpart has delivered a specific capacity of 151 F g −1 at the same current density.

Keywords: ferrites; nickel foam; binder free; supercapacitors (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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