[Science] - Fuel Cells I (Advances in Polymer Science)

268 pages Jan 10, 2008 PDF 14 Mb


The concept to utilize an ion-conducting polymer membrane as a solid polymer electrolyte offers several advantages regarding the design and operation of an electrochemical cell, as outlined in Volume 215, Chapter 1 (L. Gubler, G. G. Scherer). Essentially, the solvent and/or transport medium, e.g., H2O, for the mobile ionic species, e.g., H+ for a cation exchange membrane, is taken up by and confined into the nano-dimensional morphology of the ioncontaining domains of the polymer. As a consequence, a phase separation into a hydrophilic ion-containing solvent phase and a hydrophobic polymer backbone phase establishes. Because of the narrow solid electrolyte gap in these cells, low ohmic losses reducing the overall cell voltage can be achieved, even at high current densities..............

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