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Title: Highly stable precious metal-free cathode catalyst for fuel cell application

Authors:
; ORCiD logo; ORCiD logo; ; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1397454
Grant/Contract Number:
EE0000459
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Journal of Power Sources
Additional Journal Information:
Journal Volume: 327; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-10-04 21:09:17; Journal ID: ISSN 0378-7753
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English

Citation Formats

Serov, Alexey, Workman, Michael J., Artyushkova, Kateryna, Atanassov, Plamen, McCool, Geoffrey, McKinney, Sam, Romero, Henry, Halevi, Barr, and Stephenson, Thomas. Highly stable precious metal-free cathode catalyst for fuel cell application. Netherlands: N. p., 2016. Web. doi:10.1016/j.jpowsour.2016.07.087.
Serov, Alexey, Workman, Michael J., Artyushkova, Kateryna, Atanassov, Plamen, McCool, Geoffrey, McKinney, Sam, Romero, Henry, Halevi, Barr, & Stephenson, Thomas. Highly stable precious metal-free cathode catalyst for fuel cell application. Netherlands. doi:10.1016/j.jpowsour.2016.07.087.
Serov, Alexey, Workman, Michael J., Artyushkova, Kateryna, Atanassov, Plamen, McCool, Geoffrey, McKinney, Sam, Romero, Henry, Halevi, Barr, and Stephenson, Thomas. 2016. "Highly stable precious metal-free cathode catalyst for fuel cell application". Netherlands. doi:10.1016/j.jpowsour.2016.07.087.
@article{osti_1397454,
title = {Highly stable precious metal-free cathode catalyst for fuel cell application},
author = {Serov, Alexey and Workman, Michael J. and Artyushkova, Kateryna and Atanassov, Plamen and McCool, Geoffrey and McKinney, Sam and Romero, Henry and Halevi, Barr and Stephenson, Thomas},
abstractNote = {},
doi = {10.1016/j.jpowsour.2016.07.087},
journal = {Journal of Power Sources},
number = C,
volume = 327,
place = {Netherlands},
year = 2016,
month = 9
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.jpowsour.2016.07.087

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  • Here, this paper presents a two-dimensional (2D) computational model of a polymer electrolyte fuel cell (PEFC) with a platinum group metal-free (PGM-free) catalyst cathode that can significantly reduce PEFC costs by eliminating the need for expensive platinum catalysts. Due to their comparatively low volumetric activity, PGM-free cathodes are an order of magnitude thicker than their Pt-based counterpart. The resulting need for greater electrode thickness to achieve sufficient power density requires careful attention to the transport losses across the thicker cathodes. The presented model is used to correlate the composition and morphology of the cathode to PEFC performance. The model ismore » a complete cell, continuum model that includes an advanced agglomerate model for a microstructurally consistent representation of the cathode. A unique feature of the approach is the integration of morphology and transport parameter statistics extracted from nano-scale resolution X-ray computed tomography (nano-CT) imaging of PGM-free cathodes. The model was validated with experimental results of PGM-free cathodes with varying Nafion loading. Lastly, our key findings are a need for increased cathode hydrophobicity and increased ionomer conductivity through either reduced tortuosity or increased bulk conductivity. We further use the model to evaluate targets for the volumetric activity and active site density for future catalysts.« less
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