Doctoral Dissertations

Keywords and Phrases

Nanoconfinement; Thermal Decomposition

Abstract

"Metal hydrides are currently being studied to provide hydrogen for use in fuel cells and for transportation applications. Hydrogen can be stored in chemical compounds at higher density and lower volume than liquid H₂ or compressed gas. Thermodynamic properties of metal hydrides differ between bulk and nano-sized particles. Many metal hydrides with useful volumetric and gravimetric capacities have high decomposition temperatures, but when placed in nano-sized frameworks (or templates) desorption and adsorption temperatures can be fine-tuned to meet engineering requirements for real-world systems. Additionally, some metal hydrides have shown a change in the decomposition pathway when infiltrated into these frameworks, thereby reducing the amount of unwanted byproducts, and potentially improving the cyclability of the material. The Temperature Programmed Decomposition Mass Spectrum Residual Gas Analyzer can be used to characterize gas desorption, decomposition temperatures, picogram changes in mass, and ionization energies for a variety of materials and gasses. The goal of the system is to characterize desorption of the hydrogen (including byproduct gasses) and the decomposition of the metal hydrides. The experimental apparatus is composed of four main components: the residual gas analyzer (RGA), the low temperature stage quartz crystal microbalance (QCM), the high temperature heating stage, and two vacuum chambers separated by a small flow hole which allows a direct line-of-site to the RGA"--Abstract, page iv.

Advisor(s)

Majzoub, Eric H.
Waddill, George Daniel

Committee Member(s)

Fraundorf, Phil
Chen, Bin
Yamilov, Alexey

Department(s)

Physics

Degree Name

Ph. D. in Physics

Sponsor(s)

United States. Department of Energy
United States. National Aeronautics and Space Administration. Harriett G. Jenkins Predoctoral Fellowship Project
NASA Missouri Space Grant Consortium

Comments

Dissertation completed as part of a cooperative degree program with Missouri University of Science and Technology and the University of Missouri--St. Louis.

Publisher

Missouri University of Science and Technology

Publication Date

Fall 2013

Journal article titles appearing in thesis/dissertation

  • A Study of the Heat and Pressure Induced S105 Phase in NaAlH₄
  • Controlling the decomposition pathway of LiBH₄ via confinement in highly ordered nanoporous carbon
  • Systematic pore size effects of nanoconfinement of LiBH₄: Elimination of diborane release and tunable behavior for hydrogen storage applications
  • Tailoring the hydrogen storage properties of Li₄BN₃H₁₀ by confinement into highly ordered nanoporous carbon
  • Decomposition Behaviors of Eutectic LiBH₄-Mg(BH₄)₂ and Confinement Effects in Ordered Nanoporous Carbon

Pagination

xvii, 220 pages

Note about bibliography

Includes bibliographical references (pages 217-219).

Rights

© 2013 David Edward Peaslee, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Subject Headings

Hydrides -- Effect of high temperatures onHydrogen -- Storage -- AnalysisNanoparticles -- AnalysisMolecular dynamics -- Computer simulation

Thesis Number

T 10412

Electronic OCLC #

870672594

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