Nanofiber cathodes for low and high humidity hydrogen fuel cell operation

Publication: Research - peer-reviewConference article – Annual report year: 2011

Without internal affiliation

  • Author: Zhang, Wenjing

    Unknown

  • Author: Brodt, Matthew W.

    Vanderbilt University, United States

  • Author: Pintauro, Peter N.

    Vanderbilt University, United States

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A new fuel cell electrode fabrication scheme based on nanofiber electrospinning has been devised and nanofiber cathode membrane-electrode- assemblies (MEAs) were evaluated in a hydrogen/air fuel cell at 80°C for low and high feed gas humidification conditions. MEAs were constructed from an electrospun mat with a fiber composition of 72 wt% Pt/C, 15 wt% poly(acrylic acid), and 13 wt% Nafion®. The Pt loading of the mat was 0.1 mg/cm 2. Mats were hot-pressed onto Nafion® 212 membranes with a decal anode (at 0.4 mgPt/cm2). Under fully humidified conditions, the nanofiber cathode MEA generated very high power densities (e.g., 485 mW/cm2 at 0.6 V vs. 345 mW/cm2 for a 0.1 mg Pt/cm2 decal cathode MEA). At lower feed gas humidities, the difference in power output for the nanofiber and decal MEAs was more pronounced, e.g., at 40% RH, the power density with the nanofiber cathode was more than double that for the decal MEA (132 mW/cm2 vs. 58 mW/cm 2 at 0.6V ). © 2011 ECS - The Electrochemical Society.
Original languageEnglish
JournalE C S Transactions
Publication date2011
Volume41
Issue1
Pages891-899
ISSN1938-5862
DOIs
StatePublished

Conference

Conference220th ECS Meeting
Number220
CountryUnited States
CityBoston, MA
Period09/10/1114/10/11
Internet addresshttp://www.electrochem.org/meetings/biannual/220/220.htm
CitationsWeb of Science® Times Cited: 2
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