Stationary Power Production and Combined Heat and Power


The objective of the present proposal is to understand the functional operation and degradation mechanisms of high temperature H3PO4imbibed PEM and its electrochemical interface. The state of the art high temperature PEMFC technology is based on H3PO4 imbibed polymer electrolytes. The most challenging areas towards the optimization of this technology are: The development of stable, long lasting polymer structures with high ionic conductivity. The design and development of catalytic layers with novel structures and architectures aiming to more active and stable...


Abstract: The present proposal aims at the development of SPG&CHP systems based on Polymeric Electrolyte Membrane Fuel Cell Hydrogen (PEMFCH). A drawback in the state-of-the-art systems is the too low operating temperatures (70-80°C) of PEMFCHs for cogeneration purposes. Operating temperatures above 100°C would have several advantages including easier warm water distribution in buildings, reduced anode poisoning due to carbon monoxide impurities in the fuel and improved fuel oxidation kinetics. A PEMFCH operating in the temperature range of 100-130°C is highly desirable...


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The development of Solid Oxide Fuel Cells (SOFCs) as viable energy conversion systems is still prevented by cost, which is several times higher than that required for economic feasibility, and by insufficient durability, especially concerning that of the anode cermet electrode. The main factors affecting anode degradation in hydrogen fuelled SOFCs comprise microstructural changes due to thermal and/or electrochemical sintering, which result in decrease of the gas exposed metal area and of the three phase (gas/electrode/electrolyte) boundary length as well as oxidation/reduction of the anode (...