Investigation of interfaces in flexible lithium ion batteries

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dc.contributor.advisorArdebili, Haleh
dc.contributor.committeeMemberWolfe, John C.
dc.contributor.committeeMemberRyou, Jae-Hyun
dc.contributor.committeeMemberKarim, Alamgir
dc.contributor.committeeMemberGhasemi, Hadi
dc.creatorFu, Qiang
dc.date.accessioned2022-06-16T21:45:29Z
dc.date.createdDecember 2021
dc.date.issued2021-12
dc.date.submittedDecember 2021
dc.date.updated2022-06-16T21:45:30Z
dc.description.abstractFlexible and stretchable solid electrolyte-based lithium-ion batteries (LIBs) can potentially revolutionize our lives. They have wide range of applications, including flexible screen displays, wearable sensors, stretchable electronics, among others. Solid polymer electrolytes (SPEs) offer many advantages such as thermal and chemical stability, appropriate mechanical behavior, wide electrochemical window, safety, flexibility and low cost. However, SPE development faces several challenges, mainly, low ionic conductivity and problems pertaining to the interface between the electrodes and solid electrolytes. A stable and highly (ion) conductive interfacial layer is of utmost importance in LIB charge/discharge, rate capability, cyclability, and safety. This dissertation investigates the interface between SPE and electrodes in flexible and stretchable batteries. Several techniques to enhance the interfaces are explored including additives, specifically, tryptic soy broth (TSB) biomaterial and fluoroethylene carbonate (FEC), and enhanced SPE fabrication strategies (multi-layer fabrication method and hot-pressing). SPE-based LIB capacity improved significantly using 0.5 wt% TSB biomaterial due to the enhanced electrode-electrolyte interface. Furthermore, due to improved stable interfacial layer formation, flexible LIBs capacity more than doubled by using the FEC additives. Our flexible LIBs were shown to power light-emitting diode (LED) under 180 degree bending angles. Furthermore, spiral stretchable LIBs were demonstrated to work under 6000% out-of-plane stretching deformation. The investigation of interfacial phenomena and solid electrolytes in LIBs can provide deeper understanding of engineering strategies to improve LIBs properties and performance. The developed SPE-based flexible and stretchable LIBs can be promising for high safety and high-capacity energy applications.
dc.description.departmentMechanical Engineering, Department of
dc.format.digitalOriginborn digital
dc.format.mimetypeapplication/pdf
dc.identifier.urihttps://hdl.handle.net/10657/9247
dc.language.isoeng
dc.rightsThe author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s).
dc.subjectLithium ion batteries, interfaces
dc.titleInvestigation of interfaces in flexible lithium ion batteries
dc.type.dcmiText
dc.type.genreThesis
dcterms.accessRightsThe full text of this item is not available at this time because the student has placed this item under an embargo for a period of time. The Libraries are not authorized to provide a copy of this work during the embargo period.
local.embargo.lift2023-12-01
local.embargo.terms2023-12-01
thesis.degree.collegeCullen College of Engineering
thesis.degree.departmentMechanical Engineering, Department of
thesis.degree.disciplineMaterials Engineering
thesis.degree.grantorUniversity of Houston
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy

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