Fuel cell catalyst layers containing short-side-chain perfluorosulfonic acid ionomers

摘要

Porous catalyst layers (CLs) containing short-side-chain (SSC) perfluorosulfonic acid (PFSA) ionomers of different ion exchange capacity (IEC: 1.3, 1.4 and 1.5meqg~(-1)) were deposited onto Nation 211 to form catalyst-coated membranes. The porosity of SSC-PFSA-based CLs is larger than Nafion-CL analogues. CLs incorporating SSC ionomer extend the current density of fuel cell polarization curves at elevated temperature and lower relative humidity compared to those based on long-side chain PFSA (e.g.. Nafion)-based CLs. Fuel cell polarization performance was greatly improved at 110℃ and 30% relative humidity (RH) when SSC PFSI was incorporated into the catalyst layer.