DMFC Catalyst Layer Prepared Using Arc-Soot Nano-Carbon by Dry-Squeegee Method and Its Impedance Analysis

Micro-structure of catalyst layer influences performance of direct methanol fuel cell (DMFC). The dry-squeegee method which was a technique proposed for catalyst layer formation, was found to form a dense and uniform catalyst layer. The membrane electrode assembly (MEA) prepared by using the dry-squeegee method (MEA-ds) had a better performance than that prepared by conventional methods including dropper and brush method, since the MEA-ds had a shorter proton path from the catalyst surface to polymer membrane and many active reaction sites than other MEAs.