Dissertations, Theses, and Capstone Projects

Date of Degree

9-2016

Document Type

Dissertation

Degree Name

Ph.D.

Program

Chemistry

Advisor

Steve G. Greenbaum

Committee Members

Charles Michael Drain

Lynn C. Francesconi

Ruth E. Stark

Subject Categories

Physical Chemistry

Keywords

Lithium-ion battery, Sodium ion battery, Nuclear Magnetic Resonance, Energy storage

Abstract

Electrochemical energy storage materials constitute essential elements in the development of sustainable energy technologies. They are crucial for improving the efficiency of energy storage devices to facilitate the use of renewable resources. The increasing human demands for energy and limitation of fossil fuel stimulates the continued development of energy storage materials. Better understanding of their working mechanisms and electrochemical properties from a view of chemistry is quite necessary for improving the energy storage technology. In this work, Nuclear Magnetic Resonance (NMR) has been used as a powerful tool to characterize the solvation behavior and diffusion ability of some commonly used electrolytes in the lithium batteries. A challenging nucleus 17O has been successfully studied in glyme-based electrolytes and carbonate based electrolytes, which along with NMR diffusion measurements provides significant information about ion-ion and ion-solvent interaction. Besides these battery projects, another investigation of silicon-doped hydrogenate amorphous carbon materials has been accomplished by using NMR and Electron Paramagnetic Resonance (EPR) techniques. The structure revolution of this material induced by thermal treatment has been described in this work.

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