Exhibiting a very high surface area, good electrical conductivity and density of active sites, nitrogen-doped graphenic materials are considered as promising catalysts for the oxygen reduction reaction (ORR). Seldom studied in acidic media, N-doped foams were tested here cathode polymer electrolyte membrane fuel cell (PEMFC). The prepared via solvothermal-based process, by reacting either cyclo...

The polymer electrolyte membrane fuel cell (PEMFC) is one of the most promising candidates for automotive applications due to its high energy conversion efficiency and absence of chemical pollution. PEMFC usually uses hydrogen and oxygen as fuel in order to generate electricity, and heat and water are generated as byproducts during that procedure. These byproducts create several problems couple...

Microstructure and electrochemical properties of the cathode catalyst layers (CCL) a polymer electrolyte membrane fuel cells (PEMFC) have great impact on performance durability cell. The aim this work is to establish link between CCL structure cell performance. To obtain CCLs with unique structures six types electrodes were prepared, each different coating technique but same Pt loading. techniq...

To achieve high efficiency and low degradation of a polymer electrolyte fuel cell (PEMFC), it is necessary to maintain an appropriate level humidification in the membrane. Thus, membrane humidifiers are typically used PEMFC systems. Parameter studies important evaluate under various operating conditions reduce amount physical tests. However, simulative computationally expensive when using detai...

A double-fuzzy diagnostic methodology dedicated to online fault diagnosis of PEMFC stacks Zhixue ZHENG, Marie-Cécile PERA, Daniel HISSEL, Mohamed BECHERIF, Kréhi-serge AGBLI, Yongdong LI 1 FCLAB Research Federation, FR CNRS 3539, FEMTO-ST/Energy Department, UMR CNRS 6174, University of Franche-Comté, 90010 Belfort Cedex, France University of Technology of Belfort-Montbéliard, 90010 Belfort Cede...

Electrochemical impedance spectroscopy (EIS) is a well-established method to analyze polymer electrolyte membrane fuel cell (PEMFC). However, without further data processing, the spectrum yields only qualitative insight into mechanism and individual contribution of transport, kinetics, ohmic losses overall limitations. The distribution relaxation times (DRT) allows quantifying each these polari...

The operation of polymer electrolyte membrane fuel cells (PEMFCs) with dry feeds has been examined with different fuel cell flow channel esigns as functions of pressure, temperature and flow rate. Auto-humidified (or self-humidifying) PEMFC operation is improved at higher pressures nd low gas velocities where axial dispersion enhances “back-mixing” of the product water with the dry feed. We dem...

Understanding the thermal effects is critical in optimizing the performance and durability of proton exchange membrane fuel cells (PEMFCs). A PEMFC produces a similar amount of waste heat to its electric power output and tolerates only a small deviation in temperature from its design point. These stringent thermal requirements present a significant heat transfer challenge. The heat balance also...

Vehicle applications require efficient cold start ability and durability of polymer electrolyte membrane fuel cells (PEMFCs). In this study, various self-cold strategies including purging the PEMFC at shutdown using galvanostatic operation startup are proposed. The characteristics from −5°C a single cell experimentally investigated in situ on laboratory scale. amount cumulated charge transfer d...