Effect of Nafion Ionomer and Catalyst in Cathode Layers for the Direct Formic Acid Fuel Cell with Complex Capacitance Analysis on the Ionic Resistance

Title
Effect of Nafion Ionomer and Catalyst in Cathode Layers for the Direct Formic Acid Fuel Cell with Complex Capacitance Analysis on the Ionic Resistance
Authors
장종현김선형한종희권용재김수길이병석이국승남석우임태훈
Keywords
DFAFC; MEA; Nafion; Impedance
Issue Date
2011-10
Publisher
220th ECs meeting
Abstract
Even though the same ORR reactions occur in PEMFCs, DMFCs, and DFAFCs, the effect of ionomer content on each fuel cell system is not the same because their electrode structures and operating conditions such as the loading amount of metal catalysts and operating temperature are significantly different. In this study, DFAFC MEAs were fabricated by using Pt black and Pt/C as cathode catalysts, with various amount of Nafion ionomer. The effect of ionomer content on ORR activities was examined by single cell test, and the MEAs were electrochemically characterized by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Especially the ionic resistances of cathode layers were measured by the complex capacitance analysis of experimental impedance data. The influence of charge transfer reaction on Pt and mass transport of proton and oxygen in the catalyst layers (CL) were discussed for the DFAFC MEAs based on Pt black and Pt/C catalysts.
URI
http://pubs.kist.re.kr/handle/201004/40490
Appears in Collections:
KIST Publication > Conference Paper
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE