The impact of alkyl tri-methyl ammonium side chains on perfluorinated ionic membranes for electrochemical applications
- Colorado School of Mines, Golden, CO (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Colorado School of Mines, Golden, CO (United States); Proctor & Gamble, Cincinatti, OH (United States)
- 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
Web of Science
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