Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1282216 | International Journal of Hydrogen Energy | 2012 | 6 Pages |
The Aquivion® short-side-chain (SSC) perfluorosulfonic acid (PFSA) ionomer was adopted in catalyst layers (CL) of polymer electrolyte membrane water electrolysers (PEMWE) instead of long-side-chain (LSC) Nafion® ionomer. The effects of SSC ionomer content in CL for oxygen evolution reaction were studied in half cell with cyclic voltammetry and steady state linear sweep. In a single cell test the MEA with SSC-PFSA Aquivion® ionomer exhibited better thermal stability than the one with LSC-PFSA Nafion® ionomer at 90 °C. The cell voltage at a current density of 1 A cm−2 was 1.63 V at 90 °C using the SSC-PFSA Aquivion® ionomer binder, Nafion® 117 membrane, and without back pressurizing. In a continuous operation the cell voltage degradation rate of the MEA using Aquivion® ionomer binder was only about 0.82 mV h−1.