Electrochemical impedance spectroscopy and I-V curves have been used to compare performances of ion track-etched polyimide membranes with perfluorosulfonic membranes for a microbial fuel cell, a kind of device converting chemical energy to electricity and vice-versa thanks to the catalytic action of bacteria. For a lower cost, polyimide membranes exhibit similar results, which can even be improved if electrodes are directly coated on them.
Sonck, S., Beuls, E., Mahillon, J., & Francis, L. (2011). Performance of Ion Track-Etched Polyimide as Ion Exchange Membranes for Microbial Fuel Cells. Journal of the Electrochemical Society, 35 (32), 251-256 (32). https://doi.org/10.1149/1.3655708 (Original work published 2011)