Synthesis, characterization, and investigation of solid-state flexible supercapacitor application of molybdenum borid

Energy storage is of great importance for obtaining energy from renewable energy sources and using this energy when needed. In recent years, research on various energy storage materials for supercapacitors has rapidly increased. For the evaluation of the material on a supercapacitor electrode; it is necessary to show promising results in terms of specific power and energy density, electrical conductivity, surface properties, durability, surface area and pore size distribution for the design and development of high-performance supercapacitor devices. Today, the industrial applications of supercapacitor electrodes are not satisfactory. This thesis focuses on the synthesis of the molybdenum aluminum boride (MAB) phase using a pressureless sintering method. Chemical exfoliation of the molybdenum aluminum boride phase is presented for the synthesis of highly efficient MoB (MBene) using NaOH and LiF-HCl etching solutions. The etching solutions create 2D MoB nanostructures by selectively removing interlayer Al from molybdenum aluminum boride in water. Therefore, the selection of etching agents with different Al affinities has been investigated to obtain better nanostructure yield. According to the characteristic peaks revealed by XRD analysis of 25HT/MoAl1–xB and 10/MoAl1–xB, which are MBene samples obtained as a result of chemical exfoliation of MAB with different etching solutions, orthorhombic MoB was formed according to the characteristic peaks revealed in 25/MoAl1–xB and LiF-HCl/MoAl1–xB, tetragonal MoB was formed. A remarkable finding was obtained as a result of the emergence of two different MBene (MoB) structures by applying different etching solutions. The supercapacitor application of 10/MoAl1-xB with interdigit electrodes was realized. The produced MoB nanosheets were characterized by applying SEM, BET, XRD and EDS analysis techniques. CV, GCD and EIS analysis techniques were applied to the samples in order to obtain information about the supercapacitor performance of MoB electrodes and to investigate their usability in energy storage.