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Tailoring electrode microstructure via ink content to enable improved rated power performance for platinum cobalt/high surface area carbon based polymer electrolyte fuel cells

Journal Article · · Journal of Power Sources
 [1];  [1];  [2];  [3];  [3];  [3];  [4];  [3];  [1]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States); The Ohio State Univ., Columbus, OH (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States); Assiut University (Egypt)
Improvements in polymer electrolyte fuel cell (PEFC) electrode performance have primarily focused on catalyst and ionomer developments, marginalizing the importance of catalyst ink formulation. In this study, the effect of ink formulation is examined across a series of cathodes comprised of PtCo supported on high surface area carbon (PtCo/HSC) and Nafion ionomer using an array of in situ electrochemical and ex situ characterization techniques. In contrast to prior work on Pt/Vu systems, ink water content had little effect on the electrochemically determined ionomer coverage for the PtCo/HSC electrocatalyst examined here. Characterization using nano-scale resolution X-ray computed tomography (nano-CT) demonstrated that water-rich ink formulations lead to a reduction in aggregate size (ionomer + PtCo/HSC), improving local O2 transport. This understanding, combined with the use of a commercially-available electrocatalyst was used to produced state-of-the-art membrane electrode assemblies with Pt loadings of 0.03/0.08 mgPt/cm2 on the anode and cathode respectively, having; i) > 1 A/mgPt (0.9 ViR-free, 150 kPa, 80 °C, 100% RH, H2/O2), ii) 320 mA/cm2 at 0.8 V, 150 kPa, 80 °C, 100% RH, H2/Air), and iii) > 1 W/cm2elec at rated power (0.67 V, 250 kPa, 94 °C, 65% RH, H2/Air) or < 0.11 gPt/kWrated.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS); USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Workforce Development for Teachers and Scientists (WDTS)
Grant/Contract Number:
AC02-06CH11357; AC36-08GO28308
OSTI ID:
1777138
Alternate ID(s):
OSTI ID: 1811042
OSTI ID: 1677442
Journal Information:
Journal of Power Sources, Journal Name: Journal of Power Sources Vol. 482; ISSN 0378-7753
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (65)

Impact of Substrate and Processing on Confinement of Nafion Thin Films journal April 2014
Tailoring the Membrane-Electrode Interface in PEM Fuel Cells: A Review and Perspective on Novel Engineering Approaches journal September 2017
Analysis of the Microstructure Formation Process and Its Influence on the Performance of Polymer Electrolyte Fuel-Cell Catalyst Layers journal July 2015
A Review of the Terms Agglomerate and Aggregate with a Recommendation for Nomenclature Used in Powder and Particle Characterization journal October 2002
Study of the charge displacement at constant potential during CO adsorption on Pt(110) and Pt(111) electrodes in contact with a perchloric acid solution journal July 1992
Characterization of 9Cr-1MoVNb steel by anomalous small-angle X-ray scattering journal November 1991
New results of PEFC electrodes produced by the DLR dry preparation technique journal April 2002
Effect of the catalytic ink preparation method on the performance of polymer electrolyte membrane fuel cells journal April 2002
Pt alloy oxygen-reduction electrocatalysts: Synthesis, structure, and property journal May 2020
The impact of short side chain ionomer on polymer electrolyte membrane fuel cell performance and durability journal May 2018
Electrical resistance and microstructure of typical gas diffusion layers for proton exchange membrane fuel cell under compression journal December 2018
PEFC catalyst layers: Effect of support microstructure on both distributions of Pt and ionomer and cell performance and durability journal June 2020
Humidity and Temperature Dependences of Oxygen Transport Resistance of Nafion Thin Film on Platinum Electrode journal August 2016
An in situ technique for analyzing ionomer coverage in catalyst layers journal March 2013
Effect of gas diffusion layer compression on PEM fuel cell performance journal September 2006
Recent advances in activity and durability enhancement of Pt/C catalytic cathode in PEMFC journal October 2007
Support materials for PEMFC and DMFC electrocatalysts—A review journal June 2012
Performance of advanced automotive fuel cell systems with heat rejection constraint journal March 2016
Effects of carbon supports on Pt distribution, ionomer coverage and cathode performance for polymer electrolyte fuel cells journal May 2016
High power, Low-Pt membrane electrode assemblies for proton exchange membrane fuel cells journal December 2018
Comparative investigation into the performance and durability of long and short side chain ionomers in Polymer Electrolyte Membrane Fuel Cells journal November 2019
Utilizing ink composition to tune bulk-electrode gas transport, performance, and operational robustness for a Fe–N–C catalyst in polymer electrolyte fuel cell journal September 2020
Fabrication Method for Laboratory-Scale High-Performance Membrane Electrode Assemblies for Fuel Cells journal December 2016
Inherent Acidity of Perfluorosulfonic Acid Ionomer Dispersions and Implications for Ink Aggregation journal July 2018
The Priority and Challenge of High-Power Performance of Low-Platinum Proton-Exchange Membrane Fuel Cells journal March 2016
Determination of O 2 Mass Transport at the Pt | PFSA Ionomer Interface under Reduced Relative Humidity journal December 2015
Resolving Electrode Morphology’s Impact on Platinum Group Metal-Free Cathode Performance Using Nano-CT of 3D Hierarchical Pore and Ionomer Distribution journal November 2016
Rheological Investigation on the Microstructure of Fuel Cell Catalyst Inks journal December 2018
Dictating Pt-Based Electrocatalyst Performance in Polymer Electrolyte Fuel Cells, from Formulation to Application journal November 2019
Effect of the Side-Chain Structure of Perfluoro-Sulfonic Acid Ionomers on the Oxygen Reduction Reaction on the Surface of Pt journal December 2017
Modifying the Electrocatalyst–Ionomer Interface via Sulfonated Poly(ionic liquid) Block Copolymers to Enable High-Performance Polymer Electrolyte Fuel Cells journal April 2020
Boosting Fuel Cell Performance with Accessible Carbon Mesopores journal February 2018
Exceptional Oxygen Reduction Reaction Activity and Durability of Platinum–Nickel Nanowires through Synthesis and Post-Treatment Optimization journal April 2017
On the Micro-, Meso-, and Macroporous Structures of Polymer Electrolyte Membrane Fuel Cell Catalyst Layers journal January 2010
Control of Architecture in Rhombic Dodecahedral Pt–Ni Nanoframe Electrocatalysts journal August 2017
Fe Stabilization by Intermetallic L1 0 -FePt and Pt Catalysis Enhancement in L1 0 -FePt/Pt Nanoparticles for Efficient Oxygen Reduction Reaction in Fuel Cells journal February 2018
Controlling Nafion Structure and Properties via Wetting Interactions journal May 2012
Multimetallic Core/Interlayer/Shell Nanostructures as Advanced Electrocatalysts journal October 2014
Understanding inks for porous-electrode formation journal January 2017
Irena : tool suite for modeling and analysis of small-angle scattering journal February 2009
Ultra-small-angle X-ray scattering at the Advanced Photon Source journal April 2009
Nika : software for two-dimensional data reduction journal March 2012
Integration of TomoPy and the ASTRA toolbox for advanced processing and reconstruction of tomographic synchrotron data journal April 2016
Nanoscale 3D imaging at the Advanced Photon Source journal May 2016
Catalyst-Layer Ionomer Imaging of Fuel Cells journal September 2015
Measurement of Catalyst Layer Electrolyte Resistance in PEFCs Using Electrochemical Impedance Spectroscopy journal January 2005
Water Management in Cathode Catalyst Layers of PEM Fuel Cells journal January 2006
Proton Conduction and Oxygen Reduction Kinetics in PEM Fuel Cell Cathodes: Effects of Ionomer-to-Carbon Ratio and Relative Humidity journal January 2009
Measurement of Oxygen Transport Resistance in PEM Fuel Cells by Limiting Current Methods journal January 2009
Analysis of Oxygen-Transport Diffusion Resistance in Proton-Exchange-Membrane Fuel Cells journal January 2011
Fuel-Cell Catalyst-Layer Resistance via Hydrogen Limiting-Current Measurements journal January 2019
Oxidation of Platinum Nickel Nanowires to Improve Durability of Oxygen-Reducing Electrocatalysts journal January 2016
Effects of Porous Carbon Morphology, Agglomerate Structure and Relative Humidity on Local Oxygen Transport Resistance journal September 2019
Nanofiber Electrodes with Low Platinum Loading for High Power Hydrogen/Air PEM Fuel Cells journal January 2013
Modeling Air Electrodes with Low Platinum Loading journal January 2019
Cathode Loading Impact on Voltage Cycling Induced PEMFC Degradation: A Voltage Loss Analysis journal January 2018
Impact of Compressive Stress on MEA Pore Structure and Its Consequence on PEMFC Performance journal January 2016
Agglomerates in Polymer Electrolyte Fuel Cell Electrodes: Part II. Transport Characterization journal January 2018
Characterizing Electrolyte and Platinum Interface in PEM Fuel Cells Using CO Displacement journal December 2016
Agglomerates in Polymer Electrolyte Fuel Cell Electrodes: Part I. Structural Characterization journal January 2018
The Impact of Platinum Loading on Oxygen Transport Resistance journal January 2012
Influence of the Gas Diffusion Layer Compression on the Oxygen Transport in PEM Fuel Cells at High Water Saturation Levels journal January 2017
Impact of Platinum Loading and Catalyst Layer Structure on PEMFC Performance journal January 2013
Microstructural Analysis and Transport Resistances of Low-Platinum-Loaded PEFC Electrodes journal January 2017
Ink Solvent Dependence of the Ionomer Distribution in the Catalyst Layer of a PEMFC journal January 2018