Date of Award
Spring 5-13-2023
Document Type
Thesis
Degree Name
Master of Science (MS)
Department
Physics
First Advisor
Dr. Ram K. Gupta, rgupta@pittstate.edu
Second Advisor
Dr. Khamis Siam, ksiam@pittstate.edu
Third Advisor
Dr. Serif Uran, suran@pittstate.edu
Keywords
energy storage, supercapacitor, electrocatalyst, electrolyzer, galvanostatic charge-discharge, cyclic voltammetry
Abstract
There are various forms in which humans use energy in daily life. From applications that require a high energy density to long-term storage, the requirements for energy usage are diverse. Therefore, with the continuous increase in users worldwide, more practical energy-driven sources are required, allowing manufacturers to look toward emerging functional materials. An emerging class of functional porous materials referred to as metal-organic framework (MOF) has received considerable attention over the past two decades, partially because of their potential use in various applications, including gas storage, molecular separations, electrocatalyst, and energy devices. For example, metal oxide and hydroxide-based MOF materials are widely used for supercapacitor (SC) and electrocatalyst applications.
This thesis aims to study the electrochemical properties of nickel-derived oxide and hydroxide-based MOF for application in SCs and electrocatalysts. The effect of growth temperature on the electrochemical properties of these samples were studied. To tune the surface area and porosity, these MOFs were prepared at different temperatures. Nickel acetate and glutaric acid were used as main precursors in synthesizing nickel hydroxide (NH)-MOF (NH-MOF-140, 160, and 180 ℃) and nickel oxide (NO)-based MOF (NO-MOF-140, 160, and 180 ℃) at various temperatures. The as-prepared NH and NO-MOFs were analyzed using various techniques. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) determined the microstructure and phases of the derived hydroxides and oxides. As a result, the NH-MOF-160 shows the highest specific capacitance (Csp) of 608 F/g along with 3.98 kW/kg and 24.92 Wh/kg of power and energy density, respectively. Also, the NH-MOF-160 shows the lowest overpotential of 268 mV for oxygen evolution reaction (OER) and 176 mV for hydrogen evolution reaction (HER) to reach a current density of 10 mA/cm2.
Recommended Citation
Bhardwaj, Shiva, "ELECTROCHEMICAL PROPERTIES OF MOF-DERIVED NICKEL COMPOUNDS FOR HIGH-PERFORMANCE SUPERCAPACITORS AND ELECTROCATALYSTS" (2023). Electronic Theses & Dissertations. 443.
https://digitalcommons.pittstate.edu/etd/443
