Zirconium Silicate/IL/Mxene-based composite membranes for high-temperature fuel cell applications
A Master of Science thesis in Chemical Engineering by Reeves Nayagam Edwin entitled, “Zirconium Silicate/IL/Mxene-based composite membranes for high-temperature fuel cell applications”, submitted in June 2024. Thesis advisor is Dr. Amani Al-Othman. Soft copy is available (Thesis, Completion Certific...
محفوظ في:
| المؤلف الرئيسي: | |
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| التنسيق: | doctoralThesis |
| منشور في: |
2024
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| الموضوعات: | |
| الوصول للمادة أونلاين: | https://hdl.handle.net/11073/25605 |
| الوسوم: |
إضافة وسم
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| _version_ | 1864513431733796864 |
|---|---|
| author | Edwin, Reeves Nayagam |
| author_facet | Edwin, Reeves Nayagam |
| author_role | author |
| dc.contributor.none.fl_str_mv | Al-Othman, Amani |
| dc.creator.none.fl_str_mv | Edwin, Reeves Nayagam |
| dc.date.none.fl_str_mv | 2024-09-19T09:11:06Z 2024-09-19T09:11:06Z 2024-06 |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | 35.232-2024.17 https://hdl.handle.net/11073/25605 |
| dc.language.none.fl_str_mv | en_US |
| dc.subject.none.fl_str_mv | Composite membranes High temperature Fuel cells Zirconium silicate (ZrSi) Mxene Ionic Liquids (ILs) |
| dc.title.none.fl_str_mv | Zirconium Silicate/IL/Mxene-based composite membranes for high-temperature fuel cell applications |
| dc.type.none.fl_str_mv | info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/doctoralThesis |
| description | A Master of Science thesis in Chemical Engineering by Reeves Nayagam Edwin entitled, “Zirconium Silicate/IL/Mxene-based composite membranes for high-temperature fuel cell applications”, submitted in June 2024. Thesis advisor is Dr. Amani Al-Othman. Soft copy is available (Thesis, Completion Certificate, Approval Signatures, and AUS Archives Consent Form). |
| format | doctoralThesis |
| id | aus_3beee56a32681b1104c5fa86bc71b245 |
| identifier_str_mv | 35.232-2024.17 |
| language_invalid_str_mv | en_US |
| network_acronym_str | aus |
| network_name_str | aus |
| oai_identifier_str | oai:repository.aus.edu:11073/25605 |
| publishDate | 2024 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| spelling | Zirconium Silicate/IL/Mxene-based composite membranes for high-temperature fuel cell applicationsEdwin, Reeves NayagamComposite membranesHigh temperatureFuel cellsZirconium silicate (ZrSi)MxeneIonic Liquids (ILs)A Master of Science thesis in Chemical Engineering by Reeves Nayagam Edwin entitled, “Zirconium Silicate/IL/Mxene-based composite membranes for high-temperature fuel cell applications”, submitted in June 2024. Thesis advisor is Dr. Amani Al-Othman. Soft copy is available (Thesis, Completion Certificate, Approval Signatures, and AUS Archives Consent Form).Polymer electrolyte membranes, also known as proton exchange membrane fuel cells (PEMFCs), stand out as highly promising platforms for the generation of clean energy. With little to no emissions of carbon dioxide, nitric, and sulfur oxides during their operation when hydrogen is used as a fuel. PEMFCs are the most widely preferred fuel cell types due to their high-power density, zero noise pollution, quick startup, and all-solid structure. Currently, PEMFCs operate at temperatures less than 90℃. However, operating them at high temperatures is preferred as it offers a range of advantages, such as enhanced electrode kinetics, better water management, recovery of useful heat, use of less expensive fuels (such as hydrocarbons), and reduction in catalyst poisoning. Perfluorosulfonic acid (PFSA) membranes like Nafion are the preferred choice for most PEMFCs due to their superior electron conductivity under operating conditions below 90℃ however above 90℃ proton conductivity decreases drastically as the temperature rises, primarily due to dehydration of the membrane. In this study, an alternative proton-conducting material which is based on zirconium silicates (ZrSi) doped with Mxenes (Ti₃C₂Tᵪ) and ionic liquids, were utilized and investigated. The unmodified ZrSi demonstrated a proton conductivity of 1.73x10‾⁴S/cm. With the addition of Mxene, the conductivity increased to 4.75x10‾³S/cm. After these ionic liquids were added to the best-conducting membrane, proton conductivity grew by another order of magnitude. The maximum proton conductivity achieved in this work is 6.5x10‾² S/cm with 28 wt% of [BMIM][SCN] added to ZrSi/31.7wt%Mx. High-temperature test (up to 140℃) analysis resulted in no reduction in the order of magnitude for [BMIM][SCN] and [DEMA][OMS]; however, [HMIM][TCM] reduced by one order. Furthermore, TGA, SEM, EDX, and XRD were utilized to further analyze the membrane. XRD analysis indicated that there is a significant alteration in surface morphology. According to the TGA findings, the membrane shows enhanced thermal stability in comparison to the unmodified ZrSi and PTFE. The outcomes of this study suggest that the altered membranes presented in this thesis exhibit significant potential.College of EngineeringDepartment of Chemical and Biological EngineeringMaster of Science in Chemical Engineering (MSChE)Al-Othman, Amani2024-09-19T09:11:06Z2024-09-19T09:11:06Z2024-06info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisapplication/pdf35.232-2024.17https://hdl.handle.net/11073/25605en_USoai:repository.aus.edu:11073/256052026-04-22T07:18:42Z |
| spellingShingle | Zirconium Silicate/IL/Mxene-based composite membranes for high-temperature fuel cell applications Edwin, Reeves Nayagam Composite membranes High temperature Fuel cells Zirconium silicate (ZrSi) Mxene Ionic Liquids (ILs) |
| status_str | publishedVersion |
| title | Zirconium Silicate/IL/Mxene-based composite membranes for high-temperature fuel cell applications |
| title_full | Zirconium Silicate/IL/Mxene-based composite membranes for high-temperature fuel cell applications |
| title_fullStr | Zirconium Silicate/IL/Mxene-based composite membranes for high-temperature fuel cell applications |
| title_full_unstemmed | Zirconium Silicate/IL/Mxene-based composite membranes for high-temperature fuel cell applications |
| title_short | Zirconium Silicate/IL/Mxene-based composite membranes for high-temperature fuel cell applications |
| title_sort | Zirconium Silicate/IL/Mxene-based composite membranes for high-temperature fuel cell applications |
| topic | Composite membranes High temperature Fuel cells Zirconium silicate (ZrSi) Mxene Ionic Liquids (ILs) |
| url | https://hdl.handle.net/11073/25605 |