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Title: The impact of alkyl tri-methyl ammonium side chains on perfluorinated ionic membranes for electrochemical applications

Journal Article · · Journal of Polymer Science. Part B, Polymer Physics
DOI:https://doi.org/10.1002/polb.24825· OSTI ID:1510424
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  1. Colorado School of Mines, Golden, CO (United States)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Colorado School of Mines, Golden, CO (United States); Proctor & Gamble, Cincinatti, OH (United States)
  5. 3M Company, St. Paul, MN (United States)

Three different perfluorinated type polymers as anion exchange membranes for electrochemical applications were studied. They have a sulfonamide linkage to a spacer methylene chain attached to a tri-methyl ammonium cation, specifically using a three carbon spacer chain (PFAEM_H_C3), and methylated imide polymers with three (PFAEM_CH3_C3) and six carbon spacer chain (PFAEM_CH3_C6). There are significant number of zwitterionic side chains in the PFAEM_H_C3 polymer and very few in the PFAEM_CH3_C3 or the PFAEM_CH3_C6 polymer. They have similar halide conductivity, but the PFAEM_CH3_C6 showed highest OH- conductivity, 122 mS cm(-1) at 80 degrees C and 95% RH. The larger spacer chain polymer, PFAEM_CH3_C6 has a higher water uptake value (lambda = 9) compared to PFAEM_CH3_C3(lambda = 7) at 60 degrees C and 95% RH in the Cl- form. Therefore, it has a larger domain spacing of 4.9 nm versus 4.1 nm from small angle X-ray scattering data. The polymer was characterized by FTIR and DFT was used to fully assign the spectra. (c) 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2019

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Sustainable Transportation Office. Hydrogen Fuel Cell Technologies Office (HFTO)
Grant/Contract Number:
AC36-08GO28308; AC02‐06CH11357; AC36‐08GO28308; AC02-06CH11357
OSTI ID:
1510424
Alternate ID(s):
OSTI ID: 1505641; OSTI ID: 1558101
Report Number(s):
NREL/JA-5900-73836
Journal Information:
Journal of Polymer Science. Part B, Polymer Physics, Vol. 57, Issue 11; ISSN 0887-6266
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

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In-depth understanding of the CO 2 limitation of air fed anion exchange membrane fuel cells journal January 2020