Kombination neuer Methoden zur Bestimmung des Wasserhaushaltes von Polymer-Elektrolyt-Brennstoffzellen
FacultiesFakultät für Ingenieurwissenschaften und Informatik
LicenseStandard (ohne Print-On-Demand)
Combined novel methods for the determination of the humidification conditions of polymer electrolyte fuel cells - The water management is one of the key factors for the performance of a low temperature PEM fuel cell. With respect to the optimization of the fuel cell operation it is important to detect and differentiate water in the membrane, in the gas diffusion layer (GDL) and excess water in the flow field channel. The water content of each component influences the performance in different ways and adapted operation modes have to be kept. This work entitled ’Combined novel methods for the determination of the humidification conditions of PEM fuel cells’ provides techniques and guidelines for fuel cell operation and will conclude in a straightforward control and operation strategy. Based on a combination of electrochemical impedance spectroscopy (EIS), locally resolved current distribution measurements and neutron radiography an informative basis for the determination of the water content of an operating PEM fuel cell is created. Special attention has been paid to the reproducibility and comparability in order to set up a consistent investigation and control strategy.
Subject HeadingsNeutron [GND]
Humidity. Control [LCSH]
Proton exchange membrane fuel cells [LCSH]
Water. Management [LCSH]