Dataset of "Controlling crack formation in fuel cell catalyst layers deposited directly onto membrane via inkjet printing"

This dataset comprises the experimental measurements and electrochemical characterization data supporting research into controlled crack formation within inkjet-printed catalyst layers for polymer electrolyte membrane fuel cells (PEMFCs). It includes polarization curves and electrochemical impedance spectroscopy (EIS) results for various catalyst-coated membranes (CCMs) with platinum loadings ranging from 0.1 to 0.23 mgPt cm⁻², fabricated using high-performance industrial inkjet technology on Nafion™ membranes of 10–50 μm thickness. The data documents the transition from cracked to crack-free morphologies achieved through the optimization of printing resolution, substrate temperature, and droplet deposition sequences, providing a comparative analysis of the resulting ohmic resistance increases and power density variations across the different electrode structures.