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dc.contributor.advisorZdilla, Michael J., 1978-
dc.creatorSonnenberg, Laura Anne
dc.date.accessioned2023-05-22T19:44:08Z
dc.date.available2023-05-22T19:44:08Z
dc.date.issued2023
dc.identifier.urihttp://hdl.handle.net/20.500.12613/8452
dc.description.abstractThe demand for improved energy storage has and will continue to exponentially increase as technology advances. Electric vehicles, cell phones and laptops predominantly use lithium-ion batteries (LIBs) due to their inherent high energy densities and their ability to be recharged. However, issues such as charging rates, flammability concerns, energy density need to be addressed in the advancement and innovation of LIBs. Current LIBs suffer from acute safety issues due to the use of a volatile liquid electrolyte. These issues occur when lithium metal gets deposited irregularly onto the surface of electrodes during charge/discharge cycling, forming lithium dendrites. The dendrites then form an electronically conductive path between the cathode and the anode, causing thermal runaway. To remedy this dangerous safety issue, solid state batteries have been explored. A solid-state battery (SSB) removes the volatile liquid electrolyte and replaces it with a solid, ionically conductive electrolyte. Historically, many types of solid-state batteries have been researched, all with some critical flaw(s) that prevent them from widespread commercial adoption. Ceramic types such as Lithium lanthanum zirconium oxide (LLZO) have high ionic conductivity (>10-3 S cm-1), but suffer from mechanical brittleness, creating excess interfacial failure modes. However, polymer types such as polyethylene oxide (PEO), tend to have better interfacial contact, though they suffer from poor ionic conductivity. Improving mechanical and chemical interfacial contact between the solid-state electrolyte and electrodes, while maintaining high ionic conductivity, will provide a major improvement to the success of solid-state battery adoption. The work presented in this thesis explores novel soft solid cocrystalline electrolytes as an avenue for improved interfacial electrolyte-electrode contact while maintaining high ionic conductivity. By exploiting hard soft acid base theory, novel dinitrile-based cocrystals containing low-cost starting materials were synthesized and characterized as solid-state electrolytes. The utilization of LiBF4, adiponitrile (ADN) and/or succinonitrile (SCN) in thesecocrystals decreases Li-Li distances compared to previously reported cocrystals, thereby promoting the migration of Li-ions. Select cocrystal also reached ionic conductivity values of > 10-4 S cm-1, nearly matching that of ceramic electrolytes. Novel single-crystal-to-single-crystal (SCSC) phase transition were characterized in both LiBF4 and adiponitrile/LiBF4 cocrystals. The synthesis, thermal, and electrochemical characterization techniques for these compounds include both single crystal and powder x-ray diffraction, thermogravimetric analysis, differential scanning calorimetry, and electrochemical impedance spectroscopy.
dc.language.isoeng
dc.publisherTemple University. Libraries
dc.relation.ispartofTheses and Dissertations
dc.rightsIN COPYRIGHT- This Rights Statement can be used for an Item that is in copyright. Using this statement implies that the organization making this Item available has determined that the Item is in copyright and either is the rights-holder, has obtained permission from the rights-holder(s) to make their Work(s) available, or makes the Item available under an exception or limitation to copyright (including Fair Use) that entitles it to make the Item available.
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectInorganic chemistry
dc.subjectEnergy
dc.titleNovel Adiponitrile-Based Cocrystalline Solid State Electrolytes for Lithium-Ion Batteries
dc.typeText
dc.type.genreThesis/Dissertation
dc.contributor.committeememberWunder, Stephanie L.
dc.contributor.committeememberDobereiner, Graham
dc.contributor.committeememberSahraei, Elham
dc.description.departmentChemistry
dc.relation.doihttp://dx.doi.org/10.34944/dspace/8416
dc.ada.noteFor Americans with Disabilities Act (ADA) accommodation, including help with reading this content, please contact scholarshare@temple.edu
dc.description.degreePh.D.
dc.identifier.proqst15261
dc.date.updated2023-05-19T01:08:17Z
refterms.dateFOA2023-05-22T19:44:08Z
dc.identifier.filenameSonnenberg_temple_0225E_15261.pdf


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