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dc.contributor.authorSelf, Julian
dc.date.accessioned2015-08-17T17:50:00Z
dc.date.available2015-08-17T17:50:00Z
dc.identifier.urihttp://hdl.handle.net/10222/60315
dc.description.abstractThe lifetime of Li-ion cells can increase more than tenfold when a few weight percent of additives is added to the electrolyte of the cells. A principal challenge in understanding how these additives work is how they affect films formed on both the negative and positive electrodes. Using Archimedes’ principle, it is possible to measure the change in volume of flexible Li-ion pouch cells during charge and discharge by using equipment described in the present work. Quantitative knowledge of gases produced during the first charge, or formation, of cells can allow insight into film-forming chemical pathways. In this work, DFT (density functional theory) with a solvation model was used in the Gaussian quantum chemistry software package to further understand such pathways. The additives studied were prop-1-ene-1,3-sultone (PES) and vinylene carbonate (VC), where the control electrolyte was a mix of linear and cyclic carbonates with a conductive salt.en_US
dc.language.isoenen_US
dc.subjectLi-ionen_US
dc.subjectLithium-ionen_US
dc.subjectArchimedes' Principleen_US
dc.subjectGas Evolutionen_US
dc.subjectAdditivesen_US
dc.subjectVinylene Carbonateen_US
dc.subjectVCen_US
dc.subjectprop-1-ene-1,3-sultoneen_US
dc.subjectPESen_US
dc.subjectSolid Electrolyte Interphaseen_US
dc.subjectSEIen_US
dc.subjectQuantum Chemistryen_US
dc.subjectDFTen_US
dc.titleIN SITU VOLUME STUDIES OF LI-ION POUCH CELLSen_US
dc.typeThesisen_US
dc.date.defence2015-08-12
dc.contributor.departmentDepartment of Physics & Atmospheric Scienceen_US
dc.contributor.degreeMaster of Scienceen_US
dc.contributor.external-examinern/aen_US
dc.contributor.graduate-coordinatorTed Moncheskyen_US
dc.contributor.thesis-readerAndrew Rutenbergen_US
dc.contributor.thesis-readerMark Obrovacen_US
dc.contributor.thesis-supervisorJeff Dahnen_US
dc.contributor.ethics-approvalNot Applicableen_US
dc.contributor.manuscriptsNot Applicableen_US
dc.contributor.copyright-releaseNot Applicableen_US
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