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Title: Performance of Stratified Fuel Cell Catalyst Layer

Authors:
 [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1];  [2];  [2];  [3];  [4]
  1. Los Alamos National Laboratory
  2. National Renewable Energy Laboratory
  3. Ion Power
  4. National Institute of Standards and Technology
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1400114
Report Number(s):
LA-UR-17-29318
DOE Contract Number:
AC52-06NA25396
Resource Type:
Conference
Resource Relation:
Conference: Electrochemical Soceity ; 2017-10-01 - 2017-10-05 ; National Harbor, Maryland, United States
Country of Publication:
United States
Language:
English
Subject:
Material Science

Citation Formats

Macauley, Natalia, Komini Babu, Siddharth, Borup, Rodney L., Mukundan, Rangachary, Wilson, Mahlon Scott, Spernjak, Dusan, Stariha, Sarah, Neyerlin, Kenneth, Kocha, Shyam, Grot, Steve, and Lammana, Jacob. Performance of Stratified Fuel Cell Catalyst Layer. United States: N. p., 2017. Web.
Macauley, Natalia, Komini Babu, Siddharth, Borup, Rodney L., Mukundan, Rangachary, Wilson, Mahlon Scott, Spernjak, Dusan, Stariha, Sarah, Neyerlin, Kenneth, Kocha, Shyam, Grot, Steve, & Lammana, Jacob. Performance of Stratified Fuel Cell Catalyst Layer. United States.
Macauley, Natalia, Komini Babu, Siddharth, Borup, Rodney L., Mukundan, Rangachary, Wilson, Mahlon Scott, Spernjak, Dusan, Stariha, Sarah, Neyerlin, Kenneth, Kocha, Shyam, Grot, Steve, and Lammana, Jacob. Thu . "Performance of Stratified Fuel Cell Catalyst Layer". United States. doi:. https://www.osti.gov/servlets/purl/1400114.
@article{osti_1400114,
title = {Performance of Stratified Fuel Cell Catalyst Layer},
author = {Macauley, Natalia and Komini Babu, Siddharth and Borup, Rodney L. and Mukundan, Rangachary and Wilson, Mahlon Scott and Spernjak, Dusan and Stariha, Sarah and Neyerlin, Kenneth and Kocha, Shyam and Grot, Steve and Lammana, Jacob},
abstractNote = {},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Oct 12 00:00:00 EDT 2017},
month = {Thu Oct 12 00:00:00 EDT 2017}
}

Conference:
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  • The cathode in a polymer electrolyte fuel cell (PEFC) contributes the largest energy loss due to the slow kinetics of the oxygen reduction reaction (ORR). This issue can be addressed by either developing new noble catalysts for the ORR or increasing catalyst utilization. One effective way to increase catalyst utilization is to increase the pore volume and porosity of the catalyst layer so that the catalyst clusters are maximally exposed to gas reactants. Here, we report our study on the porosimetry of the cathode catalyst layer made with the ultra-thin film catalyst layer technique which was developed by Mahlon Wilsonmore » in our group, the effect of the making process of this membrane electrode assembly (MEA) on the porosimetric profile of catalyst layers, and the correlation of the porosimetry with the performance of the catalyst layers.« less
  • Water management in the catalyst layers of proton exchange membrane fuel cells (PEMFC) is confronted by two issues, flooding and dry out, both of which result in improper functioning of the fuel cell and lead to poor performance and degradation. At the present time, the data that has been reported about water percolation and wettability within a fuel cell catalyst layer is limited. A method and apparatus for measuring the percolation pressure in the catalyst layer has been developed based upon an experimental apparatus used to test water percolation in porous transport layers (PTL). The experimental setup uses a pseudomore » Hele-Shaw type testing where samples are compressed and a fluid is injected into the sample. Testing the samples gives percolation pressure plots which show trends in increasing percolation pressure with an increase in flow rate. A decrease in pressure was seen as percolation occurred in one sample, however the pressure only had a rising effect in the other sample.« less
  • We have developed a relatively simple one-dimensional model for the cathode catalyst layer. This model explains certain observed polarization curve features at higher current densities. These features include a change in linear slope, instead of a sharp limiting current feature, and a lower than expected ratio of current density measured using O{sub 2} relative to air. Diffusional paths, ionic resistance, and catalyst sites are intimately coupled in a pseudohomogeneous layer using effective'' parameters. 3 refs., 7 figs.