Measures to Improve Cell Performance

As described in the previous sections, the exchange current density, io, is a crucial factor in reducing the activation overvoltage. Therefore, the most important step for improving the fuel cell performance is to increase the value of io, especially at the cathode. The increase of io can be achieved in several ways summarized, as follows  

Reducing the concentration overvoltage can be achieved by enhancing mass transfer through the following ways  

There are three main ways of reducing the internal resistance of the eell  

Barbir F. PEM fuel cells theory and practice. New York Elsevier Academic Press, 2005. 

Smithsonian Institute [homepage on the Internet]. Washington, DC National Museum of American History cl 990-2008 [updated 2004]. PEM fuel cells. Available from http //americanliistory.si.edu/fuelcells/pein/pemmain.htm. 

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