1 Cathode development for Alkaline Fuel Cells based on a Porous Silver Membrane Abstract:

Porous silver membranes were investigated as potential substrates for alkaline fuel cell cathodes by the means of polarisation curves and electrochemical impedance spectroscopy measurements. The silver membranes provide both electrocatalytic function, mechanical support and a means of current collection. Improved performance, compare to a previous design, was obtained by increasing gas accessibility (using Teflon AF instead of PTFE suspension) and by adding a catalyst (MnO2 or Pt) in the membrane structure to increase the cathode activity. This new cathode design performed significantly better ( ~ 55 mA cm-2 at 0.8 V, ~295 mA cm-2 at 0.6 V and ~630 mA cm-2 at 0.4 V versus RHE) than the previous design ( ~ 30 mA cm-2 at 0.8 V, ~250 mA c