Influence of Polymer Scaffold Selection on the Properties of Conventional and Solvate Ionogel Electrolytes
Abstract: In recent
decades, ionic liquids (ILs) have received substantial interest for their application as
viable electrolytes in energy storage devices due to their low flammability, adequate
ionic conductivity, and wide electrochemical window. Room-temperature ionic liquids
possess a melting point below room temperature and consist entirely of cations and
anions. Here, traditional ... read moreimidazolium/pyrrolidinium ILs and solvate lithium-based ILs
are presented for their application in supercapacitors and lithium-ion batteries.
Additionally, considerable demand exists for the fabrication of a flexible, robust,
highly conductive solid-state electrolyte for applications in light-weight, flexible
electronics. This thesis demonstrates the design of polymer-supported ionic liquid gel
electrolytes, defined as ionogels, via in situ UV-initiated free-radical polymerization.
Solid-state electrolytes experience a hindrance in electrochemical properties due to the
presence of a highly viscous polymeric network. This investigation seeks to define the
chemical and physical interactions between a polymer-based scaffold and ionic
liquid-based electrolytes in order to leverage these properties to enhance the
electrochemical and mechanical properties of the solid-state composite. This proposal
seeks to achieve this by the following methods: (1) chemically-tailored polymer
scaffolds and (2) zwitterionic-based networks that possess an equal number of positive
and negative moieties. Enhancement of properties such as the ionic conductivity,
fraction of available free ions, lithium-ion mobility, lithium-ion transference number,
and Li battery performance are the focus of this investigation in order to prepare
commercially viable gel electrolytes for energy storage
Thesis (Ph.D.)--Tufts University, 2018.
Submitted to the Dept. of Chemical and Biological Engineering.
Advisor: Matthew Panzer.
Committee: Ayse Asatekin, Samuel Thomas, and Kuzhikalail Abraham.
Keywords: Polymer chemistry, Materials Science, and Energy.read less