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Title: Electrospun Particle/Polymer Fiber Electrodes with a Neat Nafion Binder for Hydrogen/Air Fuel Cells

Abstract

Electrospun nanofiber electrodes for hydrogen/air fuel cells were prepared using poly(ethylene oxide) (PEO) carrier polymer, where previous publications used poly(acrylic acid) (PAA). Electrospinning with PEO carrier is only possible when the ink contains Nafion® in its salt form. Here, fiber electrodes were evaluated in 5 cm2 membrane-electrode-assemblies (MEAs) and exhibited excellent power at high and low feed gas relative humidities. For example, a nanofiber cathode MEA made from an ink containing Na+-form Nafion, PEO, and Pt/C generated 822 mW/cm2 at maximum power, 40% RH, 80 °C, and 200 kPaabs, whereas PAA-based ink electrode MEAs produced 527 mW/cm2. Changes in PEO molecular weight had no notable impact on fuel cell performance. Different Nafion counter-ions were studied. The use of Cs+-form Nafion resulted in the best MEA performance, producing 919 mW/cm2 at maximum power under full humidification and 800 mW/cm2 at 40% RH.

Authors:
 [1];  [1];  [2];  [2];  [3]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [1]
  1. Vanderbilt Univ., Nashville, TN (United States)
  2. Nissan Technical Center, Farmington Hills, MI (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Fuel Cell Technologies Office
OSTI Identifier:
1709107
Grant/Contract Number:  
AC05-00OR22725; EE0007653
Resource Type:
Accepted Manuscript
Journal Name:
ECS Transactions (Online)
Additional Journal Information:
Journal Name: ECS Transactions (Online); Journal Volume: 92; Journal Issue: 8; Journal ID: ISSN 1938-6737
Publisher:
Electrochemical Society
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE

Citation Formats

Waldrop, Krysta, Slack, John, Gumeci, Cenk, Dale, Nilesh, Reeves, Kimberly Shawn, Cullen, David A., More, Karren L., and Pintauro, Peter N. Electrospun Particle/Polymer Fiber Electrodes with a Neat Nafion Binder for Hydrogen/Air Fuel Cells. United States: N. p., 2019. Web. doi:10.1149/09208.0595ecst.
Waldrop, Krysta, Slack, John, Gumeci, Cenk, Dale, Nilesh, Reeves, Kimberly Shawn, Cullen, David A., More, Karren L., & Pintauro, Peter N. Electrospun Particle/Polymer Fiber Electrodes with a Neat Nafion Binder for Hydrogen/Air Fuel Cells. United States. doi:10.1149/09208.0595ecst.
Waldrop, Krysta, Slack, John, Gumeci, Cenk, Dale, Nilesh, Reeves, Kimberly Shawn, Cullen, David A., More, Karren L., and Pintauro, Peter N. Fri . "Electrospun Particle/Polymer Fiber Electrodes with a Neat Nafion Binder for Hydrogen/Air Fuel Cells". United States. doi:10.1149/09208.0595ecst. https://www.osti.gov/servlets/purl/1709107.
@article{osti_1709107,
title = {Electrospun Particle/Polymer Fiber Electrodes with a Neat Nafion Binder for Hydrogen/Air Fuel Cells},
author = {Waldrop, Krysta and Slack, John and Gumeci, Cenk and Dale, Nilesh and Reeves, Kimberly Shawn and Cullen, David A. and More, Karren L. and Pintauro, Peter N.},
abstractNote = {Electrospun nanofiber electrodes for hydrogen/air fuel cells were prepared using poly(ethylene oxide) (PEO) carrier polymer, where previous publications used poly(acrylic acid) (PAA). Electrospinning with PEO carrier is only possible when the ink contains Nafion® in its salt form. Here, fiber electrodes were evaluated in 5 cm2 membrane-electrode-assemblies (MEAs) and exhibited excellent power at high and low feed gas relative humidities. For example, a nanofiber cathode MEA made from an ink containing Na+-form Nafion, PEO, and Pt/C generated 822 mW/cm2 at maximum power, 40% RH, 80 °C, and 200 kPaabs, whereas PAA-based ink electrode MEAs produced 527 mW/cm2. Changes in PEO molecular weight had no notable impact on fuel cell performance. Different Nafion counter-ions were studied. The use of Cs+-form Nafion resulted in the best MEA performance, producing 919 mW/cm2 at maximum power under full humidification and 800 mW/cm2 at 40% RH.},
doi = {10.1149/09208.0595ecst},
journal = {ECS Transactions (Online)},
number = 8,
volume = 92,
place = {United States},
year = {2019},
month = {10}
}

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