Journal
JOURNAL OF POWER SOURCES
Volume 220, Issue -, Pages 79-83Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2012.07.078
Keywords
Carbon nanotubes; Gas diffusion layer; PEM fuel cell; Microporous layers
Funding
- German Federal Ministry of Education and Research (BMBF) within the InnoCNT cluster initiative [X3044E]
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Microporous layers (MPLs) of gas diffusion layers (GDLs) were modified by multiwall carbon nanotubes (MWCNTs) using a wet-chemical approach. Carbon nanotubes were dispersed along with other MPL components and coated onto a GDL backing. The electronic resistance of the GDL was significantly reduced by the addition of MWCNTs. A larger mean pore diameter was obtained as compared to the reference substrates. The improved performance of proton exchange membrane fuel cells (PEMFCs) using such CNT-doped GDLs is attributed to a lower electronic resistance along with improved mass transport. Synergy effects of different carbon materials with MWCNTs and advanced dispersion processes were found to play a key role in achieving the performance improvements. (C) 2012 Elsevier B.V. All rights reserved.
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