Structure Engineering of Polymers Used in Lithium-ion Battery Electrodes for Improved Performance

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dc.contributor.advisorVerduzco, Rafael
dc.creatorLi, Xiaoyi
dc.date.accessioned2020-08-21T17:20:37Z
dc.date.available2020-08-21T17:20:37Z
dc.date.created2020-08
dc.date.issued2020-08-21
dc.date.submittedAugust 2020
dc.date.updated2020-08-21T17:20:37Z
dc.description.abstractIn this work, we focused on different applications of polymer in Lithium-ion battery electrodes, with an emphasis in structure engineering of polymers in order to provide a better understanding in the fundamental relationship between polymer structure, electrode composition, battery properties and performance. We first studied self-doped polymeric binder, PFP, in V2O5 cathodes. This fully water-processable, thermally annealed hybrid electrode shows steady cycling performance even when it is annealed at 400°C. We believe this is because the addition of 5 wt% PFP as binder helps suppress the crystallization of V2O5 xerogel and avoid the disruption of its layered structure. Then we discussed using conjugated polymer PNDI-T2EG as the active materials in electrode. We demonstrated that modification of conjugated polymer side-chains had a significant impact on the electrochemical performance of nano-composite electrodes, in particular enabling excellent performance at high charge-discharge rates. By attaching OEG side-chains, electrodes demonstrate exceptional rate performance at high charge-discharge rate, high mass loading, and high active material content. As a continued study, we look at a series of PNDI-based polymer with different ratios of OEG side-chains. All these works help to demonstrate that structure engineering of polymers is an efficient strategy when researching for the next better materials used for battery development.
dc.format.mimetypeapplication/pdf
dc.identifier.citationLi, Xiaoyi. "Structure Engineering of Polymers Used in Lithium-ion Battery Electrodes for Improved Performance." (2020) Diss., Rice University. <a href="https://hdl.handle.net/1911/109253">https://hdl.handle.net/1911/109253</a>.
dc.identifier.urihttps://hdl.handle.net/1911/109253
dc.language.isoeng
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.
dc.subjectConjugated polymer
dc.subjectlithium-ion Battery
dc.subjectorganic electrode
dc.titleStructure Engineering of Polymers Used in Lithium-ion Battery Electrodes for Improved Performance
dc.typeThesis
dc.type.materialText
thesis.degree.departmentChemical and Biomolecular Engineering
thesis.degree.disciplineEngineering
thesis.degree.grantorRice University
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy
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