Predictive system-level modeling framework for transient operation and cathode platinum degradation of high temperature proton exchange membrane fuel cells

Kregar, Ambrož (author), Tavčar, Gregor (author), Kravos, Andraž (author), Katrašnik, Tomaž (author)

High temperature proton exchange membrane fuel cells (HT-PEMFCs) are a promising and emerging technology, which enable highly efficient, low-emission, small-scale electricity and heat generation. The simultaneous reduction in production costs and prolongation of service life are considered as major challenges toward their wider market adoption, which calls for the application of predictive virtual tools during their development process. To present significant progress in the addressed area, this paper introduces an innovative real-time capable system-level modeling framework based on the following: (a) a mechanistic spatially and temporally resolved model of HT-PEMFC operation, and (b) a degradation modeling framework based on interacting individual cathode platinum degradation mechanisms. Additional innovative contributions arise from a consistent consideration of the varying particle size distribution in the transient fuel cell operating regime. The degradation modeling framework interactively considers the carbon and platinum oxidation phenomena, and platinum dissolution, redeposition, detachment, and agglomeration; hence, covering the entire causal chain of these phenomena. Presented results confirm capability of the modeling framework to accurately simulate the platinum particle size redistribution. Results clearly indicate more pronounced platinum particle growth towards the end of the channel since humidity is the main precursor of oxidation reactions. In addition, innovative modeling framework elucidate contributions of agglomeration, which is more pronounced at voltage cycling, and Ostwald ripening, which is more pronounced at higher voltages, to the platinum particles growth. These functionalities position the proposed modeling framework as a beyond state-of-the-art tool for model-supported development of the advanced clean energy conversion technologies.

• Language: English
• Keywords: fuel cells, proton-exchange membrane, high temperature, modeling, platinum degradation, mechanistically based
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Author Accepted Manuscript
• Year: 2020
• Number of pages: Str. 1-17
• Numbering: Vol. 263, art. 114547
• PID: 20.500.12556/RUL-126388
• UDC: 004.925.84(045)
• ISSN on article: 0306-2619
• DOI: 10.1016/j.apenergy.2020.114547
• COBISS.SI-ID: 17037083
• Publication date in RUL: 19.04.2021

Record is a part of a journal

• Title: Applied energy
• Shortened title: Appl. energy
• Publisher: Applied Science Publishers
• ISSN: 0306-2619
• COBISS.SI-ID: 5134599

Licences

• License: CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
• Link: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Description: The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
• Licensing start date: 19.04.2021

Secondary language

• Language: Slovenian
• Keywords: gorivne celice, membrane za izmenjavo protonov, visoke temperature, modeliranje, staranje platine, mehanska osnova