Impact of Membrane Phosphoric Acid Doping Level on Transport Phenomena and Performance in High Temperature PEM Fuel Cells

• Published in: Membranes (Basel) Vol. 11; no. 11; p. 817
• Main Authors: Li, Shian, Peng, Chengdong, Shen, Qiuwan, Wang, Chongyang, Cheng, Yuanzhe, Yang, Guogang
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 26.10.2021; MDPI
• Subjects: Aluminum; Charge transfer; Chemical reactions; Conductivity; Design; Doping; doping level; Electrochemistry; Energy; Finite volume method; Fluid dynamics; Fluid flow; Fuel cells; Fuel technology; Gases; Heat conductivity; Heat transfer; High temperature; HT-PEMFCs; Investigations; Local current; Mass transfer; Mathematical models; Membranes; Numerical analysis; Partial differential equations; Performance evaluation; Phosphoric acid; Proton exchange membrane fuel cells; Protons; Three dimensional models; transport characteristics; Transport phenomena; Transport properties
• ISSN: 2077-0375; 2077-0375
• DOI: 10.3390/membranes11110817

In this work, a three-dimensional mathematical model including the fluid flow, heat transfer, mass transfer, and charge transfer incorporating electrochemical reactions was developed and applied to investigate the transport phenomena and performance in high-temperature proton exchange membrane fuel cells (HT-PEMFCs) with a membrane phosphoric acid doping level of 5, 7, 9, 11. The cell performance is evaluated and compared in terms of the polarization curve. The distributions of temperature, oxygen mass fraction, water mass fraction, proton conductivity, and local current density of four cases are given and compared in detail. Results show that the overall performance and local transport characteristics are significantly affected by the membrane phosphoric acid doping level.