title: Performance enhancement of polymer electrolyte membrane fuel cells by dual-layered membrane electrode assembly structures with carbon nanotubes.
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.
authors.affiliation: Chemical Engineering and Bioengineering, University of Ulsan, Daehak-Ro 102, Nam-Gu, Ulsan 680-749, Korea.
authors.forename: Dong-Won
authors.initials: DW
authors.lastname: Jung
authors.forename: Jun-Ho
authors.initials: JH
authors.lastname: Kim
authors.forename: Se-Hoon
authors.initials: SH
authors.lastname: Kim
authors.forename: Jun-Bom
authors.initials: JB
authors.lastname: Kim
authors.forename: Eun-Suok
authors.initials: ES
authors.lastname: Oh
mesh_terms: D011211:Electric Power Supplies; D004566:Electrodes; D004573:Electrolytes / Q000737:chemistry; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008567:Membranes, Artificial; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D011108:Polymers / Q000737:chemistry*
chemical_list: D004573:Electrolytes; D008567:Membranes, Artificial; D037742:Nanotubes, Carbon; D011108:Polymers