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

261 pages Jan 10, 2005 PDF 15 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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