مورد إلكتروني
Design and Manufacture of Gas-Diffusion-Layer-Free Proton Exchange Membrane Fuel Cells with Ultrathin Electrode and Porous Metal Foam Flow Field
| العنوان: | Design and Manufacture of Gas-Diffusion-Layer-Free Proton Exchange Membrane Fuel Cells with Ultrathin Electrode and Porous Metal Foam Flow Field |
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| المؤلفون: | Wu, Siyuan |
| بيانات النشر: | eScholarship, University of California 2023-01-01 |
| تفاصيل مُضافة: | Park, Jae Wan1 Wu, Siyuan |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | As a high-efficiency and zero-emission energy conversion device that directly converts the chemical energy of fuels and oxidants into electricity, proton exchange membrane fuel cell (PEMFC) is one of the most important end-uses of hydrogen. Improving power density is the most crucial trend for the development of PEMFC. As a promising alternative to traditional channel-rib flow fields, metal foam flow field has gained increasing attention. Its unique open-cellular structure ensures high porosity and tortuosity, which facilitates uniform distribution of reactants and enhances mass transfer while possessing advantages like superior electrical and thermal conductivities, light-weight, and uniform stress distribution. Hence, from the perspectives of functions and requirements, a PEMFC employing metal foam flow field holds the potential feasibility of removing the gas diffusion layer (GDL) away from the membrane electrode assembly (MEA).In this dissertation, an experimental investigation of the effects of different flow field configurations on PEMFC performance is first conducted. The PEMFCs utilizing parallel flow field, serpentine flow field, and Ni foam flow field are compared. The effects of operating conditions on the performance of PEMFC using Ni foam flow field are studied, including operating temperature, back pressure, intake flow rate, and relative humidity. The effects of Ni foam physical parameters on the performance of PEMFC using Ni foam flow field are then investigated, including compression ratio, pore size, hydrophobicity, and surface treatments. A comprehensive numerical simulation on PEMFC performance, including oxygen concentration, membrane water content, and overpotentials, using a 3D non-isothermal multi-phase model is conducted for cell structure evaluation, including straight channel, fine channel, wave-like channel, partially narrow channel, channel inserting baffle, modified pin-type structure, 3D fine mesh, and metal foam. The influence of GDL |
| مصطلحات الفهرس: | Engineering, Mechanical engineering, flow field design, metal foam, Proton exchange membrane fuel cell, water and thermal management, publication |
| URL: | |
| الإتاحة: | Open access content. Open access content public |
| ملاحظة: | English |
| أرقام أخرى: | CDLER oai:escholarship.org:ark:/13030/qt12w534sq qt12w534sq https://escholarship.org/uc/item/12w534sqTest https://escholarship.orgTest/ 1391584921 |
| المصدر المساهم: | UC MASS DIGITIZATION From OAIster®, provided by the OCLC Cooperative. |
| رقم الانضمام: | edsoai.on1391584921 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |