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ENERGIX-Stort program energi

STAtionary PEM fuel cells with lifetimes beyond five YEaRS

Tildelt: kr 2,1 mill.

SINTEF har fortsatt akselerert testing av MEAs, samt undersøkt toleransen for urenheter for disse. De forskjellige MEAs fra SolviCore viser forskjellig ytelse og levetid, og det er stor variasjon i effekten av urenheter og muligheten for å påvirke og reversere dette. Alle resultater er oppsummert og sammenlignet med resultater fra Nedstack og SolviCore.

Economical use of PEMFC power for stationary applications demands a lifetime of the fuel cells of at least 5 years, or more than 40,000 hours of continuous operation. The prospect of large scale application for automotive use has focused PEM research on l ow cost production techniques with practical lifetimes of the fuel cells of 5,000 hours. For the stationary use, especially in the chemical industry and in remote areas, robustness, reliability, and longevity are often more important than the cost of the initial investment. For stationary generators the yearly cost of maintenance and overhaul are expected to be much larger than for intermittent applications such as automotive- and back-up power. To reach the high goals of the project, basic material res earch is given maximum attention. The durability of all components of a stack of PEM fuel cells, especially that of the Membrane Electrode Assembly, rims and seals, cell/bipolar plates, and flow field is of paramount importance for a stationary power gene rator. STAYERS is dedicated to the goal of obtaining 40,000 hours of PEM fuel cell lifetime employing the best technological and scientific means. Apart from materials research it also requires a detailed investigation of degradation mechanisms and their mitigation during continuous operation. Factors relevant for the balance of plant will also be addressed. These are the operating temperature, degree of humidification of fuel and air, and the excess ratio with respect to the stoichiometry of the supplie d gases. The effect of possible contaminants should be taken into account. Solexis (I), SolviCore (DE), and NedStack (NL) are manufacturers of state-ofthe- art membranes, MEAs and fuel cell stacks, respectively. SINTEF (NO) is a scientific and technologi cal institute well equipped to perform an in depth analysis of the degradation processes. Joint Research Centre of the EC located in Petten (NL), possesses the expertise to review and to model the results.

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ENERGIX-Stort program energi