Electrospun Nanofiber Electrodes for High and Low Humidity PEMFC Operation

Waldrop, Krysta; Slack, John J.; Gumeci, Cenk; Parrondo, Javier; Dale, Nilesh; Reeves, Kimberly Shawn; Cullen, David A.; More, Karren L.; Pintauro, Peter N.

doi:10.1149/1945-7111/acb8e2

Title: Electrospun Nanofiber Electrodes for High and Low Humidity PEMFC Operation

Abstract

Abstract MEAs with nanofiber mat electrodes containing Pt/C catalyst and Nafion binder were fabricated and evaluated. The electrodes were prepared by electrospinning a solution of catalyst powder, salt-form Nafion (with Na ⁺ , Li ⁺ , or Cs ⁺ as the sulfonic acid counterion), and a carrier polymer of either polyethylene oxide or poly(acrylic acid). The carrier polymer was extracted prior to MEA testing by a hot water soaking step. The resulting fibers were 15-17% porous, with a core-shell-like morphology (a coating of primarily Nafion on the fiber surface). MEAs with anode/cathode catalyst loadings of 0.1 mg _Pt /cm ² each and a Nafion 211 membrane produced high power at both high and low relative humidity (RH) conditions in H2/air fuel cell tests, e.g., a maximum power density of 919 mW/cm ² at 100% RH and 832 mW/cm ² at 40% RH for a test at 80 °C and 200 kPa _abs . The presence of nm-size pores within the fibers trapped water via capillary condensation during low RH feed gas testing, thus maintaining a high proton conductivity of the Nafion binder in the anode and cathode while minimizing/eliminating ionic isolation of catalyst particles in low water content, poorly conductivemore » binder.« less

Authors:

Waldrop, Krysta; Slack, John J.; Gumeci, Cenk; Parrondo, Javier; Dale, Nilesh; Reeves, Kimberly Shawn;

; More, Karren L.;

Publication Date:: Wed Feb 15 00:00:00 EST 2023

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

OSTI Identifier:: 1924817

Alternate Identifier(s):: OSTI ID: 1923396; OSTI ID: 1986210

Grant/Contract Number:: AC05-00OR22725; EE0007653

Resource Type:: Published Article

Journal Name:: Journal of the Electrochemical Society

Additional Journal Information:: Journal Name: Journal of the Electrochemical Society Journal Volume: 170 Journal Issue: 2; Journal ID: ISSN 0013-4651

Publisher:: The Electrochemical Society

Country of Publication:: United States

Language:: English

Subject:: 25 ENERGY STORAGE

Citation Formats


                    Waldrop, Krysta, Slack, John J., Gumeci, Cenk, Parrondo, Javier, Dale, Nilesh, Reeves, Kimberly Shawn, Cullen, David A., More, Karren L., and Pintauro, Peter N. Electrospun Nanofiber Electrodes for High and Low Humidity PEMFC Operation.  United States: N. p., 2023. 
Web.  doi:10.1149/1945-7111/acb8e2.

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                    Waldrop, Krysta, Slack, John J., Gumeci, Cenk, Parrondo, Javier, Dale, Nilesh, Reeves, Kimberly Shawn, Cullen, David A., More, Karren L., & Pintauro, Peter N. Electrospun Nanofiber Electrodes for High and Low Humidity PEMFC Operation.  United States.  https://doi.org/10.1149/1945-7111/acb8e2

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                    Waldrop, Krysta, Slack, John J., Gumeci, Cenk, Parrondo, Javier, Dale, Nilesh, Reeves, Kimberly Shawn, Cullen, David A., More, Karren L., and Pintauro, Peter N. Wed .  
"Electrospun Nanofiber Electrodes for High and Low Humidity PEMFC Operation".  United States.  https://doi.org/10.1149/1945-7111/acb8e2.

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@article{osti_1924817,

  title        = {Electrospun Nanofiber Electrodes for High and Low Humidity PEMFC Operation},

  author       = {Waldrop, Krysta and Slack, John J. and Gumeci, Cenk and Parrondo, Javier and Dale, Nilesh and Reeves, Kimberly Shawn and Cullen, David A. and More, Karren L. and Pintauro, Peter N.},

  abstractNote = {Abstract MEAs with nanofiber mat electrodes containing Pt/C catalyst and Nafion binder were fabricated and evaluated. The electrodes were prepared by electrospinning a solution of catalyst powder, salt-form Nafion (with Na + , Li + , or Cs + as the sulfonic acid counterion), and a carrier polymer of either polyethylene oxide or poly(acrylic acid). The carrier polymer was extracted prior to MEA testing by a hot water soaking step. The resulting fibers were 15-17% porous, with a core-shell-like morphology (a coating of primarily Nafion on the fiber surface). MEAs with anode/cathode catalyst loadings of 0.1 mg Pt /cm 2 each and a Nafion 211 membrane produced high power at both high and low relative humidity (RH) conditions in H2/air fuel cell tests, e.g., a maximum power density of 919 mW/cm 2 at 100% RH and 832 mW/cm 2 at 40% RH for a test at 80 °C and 200 kPa abs . The presence of nm-size pores within the fibers trapped water via capillary condensation during low RH feed gas testing, thus maintaining a high proton conductivity of the Nafion binder in the anode and cathode while minimizing/eliminating ionic isolation of catalyst particles in low water content, poorly conductive binder.},

  doi          = {10.1149/1945-7111/acb8e2},

  journal      = {Journal of the Electrochemical Society},

  number       = 2,

  volume       = 170,

  place        = {United States},

  year         = {Wed Feb 15 00:00:00 EST 2023},

  month        = {Wed Feb 15 00:00:00 EST 2023}

}

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Title: Electrospun Nanofiber Electrodes for High and Low Humidity PEMFC Operation

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Electrospun Nanofiber-Based Anodes, Cathodes, and Separators for Advanced Lithium-Ion Batteries
journal, July 2011

Assembly of Pt Nanoparticles on Graphitized Carbon Nanofibers as Hierarchically Structured Electrodes
journal, September 2020

Nanofiber composite membranes with low equivalent weight perfluorosulfonic acid polymers
journal, January 2010

Enhanced Water Management of Polymer Electrolyte Fuel Cells with Additive-Containing Microporous Layers
journal, September 2018

Analysis of Water Adsorption and Condensation in Catalyst Layers for Polymer Electrolyte Fuel Cells
journal, September 2014

Percolative model of proton conductivity of Nafion® membranes
journal, April 2008

Ultra-low platinum loadings in polymer electrolyte membrane fuel cell electrodes fabricated via simultaneous electrospinning/electrospraying method
journal, October 2014

Toward Optimizing Electrospun Nanofiber Fuel Cell Catalyst Layers: Microstructure and Pt Accessibility
journal, March 2021

Experimental study of variable operating parameters effects on overall PEMFC performance and spatial performance distribution
journal, November 2016

Electrospun Particle/Polymer Fiber Electrodes with a Neat Nafion Binder for Hydrogen/Air Fuel Cells
journal, July 2019

High Areal Capacity Si/LiCoO ₂ Batteries from Electrospun Composite Fiber Mats
journal, March 2017

Ultralow-loading platinum-cobalt fuel cell catalysts derived from imidazolate frameworks
journal, November 2018

The electrochemical hydrogenation of edible oils in a solid polymer electrolyte reactor. II. Hydrogenation selectivity studies
journal, February 1999

Recent advances in electrospun carbon fiber electrode for vanadium redox flow battery: Properties, structures, and perspectives
journal, December 2020

High-Performance Nanofiber Fuel Cell Electrodes
journal, November 2011

Relative Humidity Dependence of Pt Utilization in Polymer Electrolyte Fuel Cell Electrodes: Effects of Electrode Thickness, Ionomer-to-Carbon Ratio, Ionomer Equivalent Weight, and Carbon Support
journal, January 2011

Nanofiber Electrodes with Low Platinum Loading for High Power Hydrogen/Air PEM Fuel Cells
journal, January 2013

Exploring the Impact of Electrode Microstructure on Redox Flow Battery Performance Using a Multiphysics Pore Network Model
journal, January 2019

Application of electrospinning for the fabrication of proton-exchange membrane fuel cell electrodes
journal, June 2020