Date of Degree

2-2018

Document Type

Dissertation

Degree Name

Ph.D.

Program

Physics

Advisor

Steve Greenbaum

Committee Members

Sophia Suarez

Song Chung

Ying-Chih Chen

Hyungsik Lim

Subject Categories

Physical Chemistry | Physics

Keywords

NMR, X-ray Scattering, Li-ion Batteries, Ionic Liquids, PEM, Electrolyte

Abstract

Energy storage and conversion plays a critical role in the efficient use of available energy and is crucial for the utilization of renewable energy sources. To achieve maximum efficiency of renewable energy sources, improvements to energy storage materials must be developed. In this work, novel electrolytes for secondary batteries and fuel cells have been studied using nuclear magnetic resonance and high pressure x-ray scattering techniques to form a better understanding of dynamic and structural properties of these materials. Ionic liquids have been studied due to their potential as a safer alternative to organic solvent-based electrolytes in lithium-ion batteries and composite sulfonated polyetheretherketone (sPEEK) membranes have been investigated for their potential use as a proton exchange membrane electrolyte in direct methanol fuel cells. The characterization of these novel electrolytes is a step towards the development of the next generation of improved energy storage and energy conversion devices.

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