Development and Analysis of Mechanochemically Treated Magnesium Diboride Based Materials for Hydrogen Storage

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dc.contributor.advisorJensen, Craig
dc.contributor.authorSugai, Cody Lee Akihiro
dc.contributor.departmentChemistry
dc.date.accessioned2025-02-20T22:37:05Z
dc.date.available2025-02-20T22:37:05Z
dc.date.issued2024
dc.description.degreePh.D.
dc.identifier.urihttps://hdl.handle.net/10125/110238
dc.subjectChemistry
dc.titleDevelopment and Analysis of Mechanochemically Treated Magnesium Diboride Based Materials for Hydrogen Storage
dc.typeThesis
dcterms.abstractWith the technical progression of humanity marching ever onwards, new energy carriers are needed to address growing energy and environmental concerns. Hydrogen is one of the most promising energy carriers for the future as it stores much more energy than non-renewable sources while creating no environmentally destructive byproducts during combustion. However, hydrogen utility has yet to overcome challenging transportation and storage hurdles due to a lack of effective storage materials and infrastructure. The cycle between magnesium borohydride (Mg(BH4)2) and magnesium boride (MgB2) is a promising hydrogen storage solution due to the high gravimetric weight % of H2 stored within it, as well as the favorable dehydrogenation enthalpy of Mg(BH4)2. The major challenge faced by the utility of this system is the kinetic limitations in the hydrogenation of MgB2, as the 400° C and 1000 bar of H2 pressure needed are far outside the realm of practicality. Contained in this dissertation is a mechanochemical exploration of reagent and ball milling effects that greatly reduced the hydrogenation requirements of MgB2, as well as an exploration and discussion of a graphenic phase discovered during that exploration that is capable of permanently confining H2 gas. These materials and mechanochemical effects were examined via Fourier Transformation Infrared Spectroscopy (FTIR), Solution and Solid State 11B and 1H Nuclear Magnetic Resonance Spectroscopy (NMR), X-ray Diffraction (XRD), Thermogravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC), Scanning/Transmission Electron Microscopy(S/TEM), High- Angle Annular Dark/Bright Field Imaging (HAAD/BF), Selected Area Electron Diffraction (SAED), Energy-Dispersive X-ray Spectroscopy (EDS), Electron Energy Loss Spectroscopy (EELS), utilized with Focused Ion Beam (FIB) slicing.
dcterms.extent76 pages
dcterms.languageen
dcterms.publisherUniversity of Hawai'i at Manoa
dcterms.rightsAll UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
dcterms.typeText
local.identifier.alturihttp://dissertations.umi.com/hawii:12426

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