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Using layer-by-layer assembly of polyaniline fibers in the fast preparation of high performance fuel cell nanostructured membrane electrodes

Michel, Marc ; Ettingshausen, Frank ; Scheiba, Frieder ; Wolz, André ; Roth, Christina (2008)
Using layer-by-layer assembly of polyaniline fibers in the fast preparation of high performance fuel cell nanostructured membrane electrodes.
In: Physical Chemistry Chemical Physics, 10 (25)
doi: 10.1039/b802813n
Article, Bibliographie

Abstract

Membrane electrode assemblies (MEA) for fuel cells require optimization of their nanoscale organization to reach performance parameters, which include enhanced power density, increased catalyst utilization and reduced cost. We applied sprayed layer-by-layer assembly to produce a high activity MEA for H2/O2 fuel cells from polyaniline fibers (PANI-F). This technique produces “fast-prepared” membranes with nanoscale structure, which allows to adequately address specific tuning of their porosity, platinum loading, electronic conductivity, and proton conductivity. Pt nanoparticles were attached to the PANI-F in a reaction of selective heterogeneous nucleation. After functionalization, Pt/PANI-F were assembled with Nafion™. Microscopic investigation revealed that functionalized polyaniline fibers formed a highly porous yet tight network of interpenetrating conductors connected to the catalytic Pt particles. The Pt/PANI-F LBL ultrathin MEA demonstrated a power densitiy of 63 mW cm−2 and yielded a Pt utilization of 437.5 W g−1 Pt which is comparable to the traditional fuel cell using carbon black as Pt support. Moreover, the amount of Pt used in this work is almost 2 times lower than for usual carbon-supported Pt catalysts.

Item Type: Article
Erschienen: 2008
Creators: Michel, Marc ; Ettingshausen, Frank ; Scheiba, Frieder ; Wolz, André ; Roth, Christina
Type of entry: Bibliographie
Title: Using layer-by-layer assembly of polyaniline fibers in the fast preparation of high performance fuel cell nanostructured membrane electrodes
Language: English
Date: 2008
Publisher: Royal Society of Chemistry Publishing
Journal or Publication Title: Physical Chemistry Chemical Physics
Volume of the journal: 10
Issue Number: 25
DOI: 10.1039/b802813n
Abstract:

Membrane electrode assemblies (MEA) for fuel cells require optimization of their nanoscale organization to reach performance parameters, which include enhanced power density, increased catalyst utilization and reduced cost. We applied sprayed layer-by-layer assembly to produce a high activity MEA for H2/O2 fuel cells from polyaniline fibers (PANI-F). This technique produces “fast-prepared” membranes with nanoscale structure, which allows to adequately address specific tuning of their porosity, platinum loading, electronic conductivity, and proton conductivity. Pt nanoparticles were attached to the PANI-F in a reaction of selective heterogeneous nucleation. After functionalization, Pt/PANI-F were assembled with Nafion™. Microscopic investigation revealed that functionalized polyaniline fibers formed a highly porous yet tight network of interpenetrating conductors connected to the catalytic Pt particles. The Pt/PANI-F LBL ultrathin MEA demonstrated a power densitiy of 63 mW cm−2 and yielded a Pt utilization of 437.5 W g−1 Pt which is comparable to the traditional fuel cell using carbon black as Pt support. Moreover, the amount of Pt used in this work is almost 2 times lower than for usual carbon-supported Pt catalysts.

Divisions: 11 Department of Materials and Earth Sciences > Material Science > Erneuerbare Energien
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 22 Feb 2013 08:41
Last Modified: 05 Mar 2013 10:05
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