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Journal article
Modifying the Electrocatalyst-Ionomer Interface via Sulfonated Poly(ionic liquid) Block Copolymers to Enable High-Performance Polymer Electrolyte Fuel Cells
ACS energy letters, v 5(6), pp 1726-1731
12 Jun 2020
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Polymer electrolyte membrane fuel cell (PEMFC) electrodes with a 0.07 mg(Pt) cm(-2) Pt/Vulcan electrocatalyst loading, containing only a sulfonated poly(ionic liquid) block copolymer (SPILBCP) ionomer, were fabricated and achieved a ca. 2x enhancement of kinetic performance through the suppression of Pt surface oxidation. However, SPILBCP electrodes lost over 70% of their electrochemical active area at 30% RH because of poor ionomer network connectivity. To combat these effects, electrodes made with a mix of Nafion/SPILBCP ionomers were developed. Mixed Nafion/SPILBCP electrodes resulted in a substantial improvement in MEA performance across the kinetic and mass transport-limited regions. Notably, this is the first time that specific activity values determined from an MEA were observed to be on par with prior half-cell results for Nafion-free Pt/Vulcan systems. These findings present a prospective strategy to improve the overall performance of MEAs fabricated with surface accessible electrocatalysts, providing a pathway to tailor the local electrocatalyst/ionomer interface.
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Details
- Title
- Modifying the Electrocatalyst-Ionomer Interface via Sulfonated Poly(ionic liquid) Block Copolymers to Enable High-Performance Polymer Electrolyte Fuel Cells
- Creators
- Yawei Li - National Renewable Energy LaboratoryTim Van Cleve - National Renewable Energy LaboratoryRui Sun - Texas A&M UniversityRamchandra Gawas - Drexel UniversityGuanxiong Wang - National Renewable Energy LaboratoryMaureen Tang - Drexel UniversityYossef A. Elabd - Texas A&M UniversityJoshua Snyder - Drexel UniversityK. C. Neyerlin - National Renewable Energy LaboratoryNational Renewable Energy Lab. (NREL), Golden, CO (United States)
- Publication Details
- ACS energy letters, v 5(6), pp 1726-1731
- Publisher
- American Chemical Society; Washington, DC
- Number of pages
- 6
- Grant note
- DE-AC36-08GO28308 / U.S. Department of Energy (DOE); United States Department of Energy (DOE) U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Fuel Cell Technologies Office (FCTO); United States Department of Energy (DOE)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Web of Science ID
- WOS:000541766000002
- Scopus ID
- 2-s2.0-85087522930
- Other Identifier
- 991019168543704721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Chemistry, Physical
- Electrochemistry
- Energy & Fuels
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology