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Performance enhancement of polymer electrolyte membrane fuel cells by dual-layered membrane electrode assembly
Dong-Won Jung1, Jun-Ho Kim, Se-Hoon Kim
1Chemical Engineering and Bioengineering, University of Ulsan, Daehak-Ro 102, Nam-Gu, Ulsan 680-749, Korea.
Abstract:
The effect of dual-layered membrane electrode assemblies (d-MEAs) on the performance of a polymer electrolyte membrane fuel cell (PEMFC) was investigated using the following characterization techniques: single cell performance test, electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV). It has been shown that the PEMFC with d-MEAs has better cell performance than that with typical mono-layered MEAs (m-MEAs). In particular, the d-MEA whose inner layer is composed of multi-walled carbon nanotubes (MWCNTs) showed the best fuel cell performance. This is due to the fact that the d-MEAs with MWCNTs have the highest electrochemical surface area and the lowest activation polarization, as observed from the CV and EIS test.
