Document Details

Document Type : Thesis 
Document Title :
PRINTING OF SUPERCAPACITORS BASED ON NANOCOMPOSITES OF VANADIUM DIOXIDE
طباعة مكثفات فائقة مرتكزة على مركبات نانوية من ثاني أكسيد الفاناديوم
 
Subject : Faculty of Science 
Document Language : Arabic 
Abstract : Nowadays, there is great interest in flexible printed electronics that are manufactured at low costs and in large quantities. Supercapacitors hold great promise due to their high-power density, stability, and long cycle life. Screen printing is well known for the mass production of energy storage devices, however, one of the major challenges remains in preparing high-quality inks. In this thesis, homogenous and stable inks based on the monoclinic phase of VO2(M) microparticles and nanoparticles have been synthesized by a simple hydrothermal process in only 6 h and through nontoxic solutions. The VO2 microparticle ink is printed on a Kapton substrate in a single-layer as well as in a double-layer arrangement. The VO2 nanoparticle ink is also printed in a single-layer and hybrid with nanogold ink. The printed single-layer VO2 electrode showed a remarkable maximum areal capacitance of 20 mF/cm2 with a small equivalent series resistance of 4 ohms without conducting additives. Moreover, the maximum areal energy of the double-layer printed supercapacitor is 0.8 μWh/cm2 at an areal power of 21 μW/cm2, which is larger than the single-layer of 0.2 μWh/cm2 at 17.5 μW/cm2. This interdigitated full-cell VO2 supercapacitor effectively employs the electric double-layer and faradic redox mechanisms at 1.4 V, which is the highest operating voltage reported for supercapacitors based on pure vanadium oxide electrodes in aqueous inorganic electrolytes. Besides, the electrochemical storage properties of the hybrid electrode of VO2/Au nanoparticles showed an areal capacitance of 16 mF/cm2 higher than the pure electrode of VO2 nanoparticles. The parallel hybrid electrodes design is utilized, which greatly considerably enhances the supercapacitor's performance, compared with the supercapacitor that only uses identical electrodes. Integrating such printed supercapacitors into thin-film electronics could develop portable devices. 
Supervisor : Dr. Nuha Alawi Alhebshi 
Thesis Type : Master Thesis 
Publishing Year : 1444 AH
2023 AD 
Co-Supervisor : Dr. Amal Mohammed Alamri 
Added Date : Thursday, April 27, 2023 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
بشائر عبدالله منياويMinyawi, Bashaer AbdullahResearcherMaster 

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