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A multi-cell test system with 25 independent cells is used to test different electrode materials
simultaneously for polymer electrolyte membrane fuel cells (PEMFCs). Twenty-five segmented membrane
electrode assemblies (MEAs) having the same or different Pt-loading are prepared to analyze the performance
deviation of cells in the multi-cell test system. Improvements in the multi-cell test system are made by ensuring
that the system performs voltage sensing for the cells individually and inserting optimum gaskets between
the MEAs and the graphite plates. The cell performances are improved and their deviations are significantly
decreased by these modifications. The performance deviations changed according to various cell configurations
because the operating conditions of the cells, such as the gas flow and concentration, differed. This cell system
can be used to test multiple electrodes simultaneously because it shows relatively uniform performance under
the same conditions as well as linear correlation with various catalyst loadings.
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