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Preparation and Study of Sulfonated Co-Polynaphthoyleneimide Proton-Exchange Membrane for a H2/Air Fuel Cell

Zavorotnaya, Ulyana M. ; Ponomarev, Igor I. ; Volkova, Yulia A. ; Modestov, Alexander D. ; Andreev, Vladimir N. ; Privalov, Alexei F. ; Vogel, Michael ; Sinitsyn, Vitaly V. (2022):
Preparation and Study of Sulfonated Co-Polynaphthoyleneimide Proton-Exchange Membrane for a H2/Air Fuel Cell. (Publisher's Version)
In: Materials, 13 (22), MDPI, e-ISSN 1996-1944,
DOI: 10.26083/tuprints-00017438,
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Item Type: Article
Origin: Secondary publication DeepGreen
Status: Publisher's Version
Title: Preparation and Study of Sulfonated Co-Polynaphthoyleneimide Proton-Exchange Membrane for a H2/Air Fuel Cell
Language: English
Abstract:

The sulfonated polynaphthoyleneimide polymer (co-PNIS70/30) was prepared by copolymerization of 4,40 -diaminodiphenyl ether-2,20 -disulfonic acid (ODAS) and 4,4’-methylenebisanthranilic acid (MDAC) with ODAS/MDAC molar ratio 0.7/0.3. High molecular weight co-PNIS70/30 polymers were synthesized either in phenol or in DMSO by catalytic polyheterocyclization in the presence of benzoic acid and triethylamine. The titration reveals the ion-exchange capacity of the polymer equal to 2.13 meq/g. The membrane films were prepared by casting polymer solution. Conductivities of the polymer films were determined using both in- and through-plane geometries and reached ~96 and ~60 mS/cm, respectively. The anisotropy of the conductivity is ascribed to high hydration of the surface layer compared to the bulk. SFG NMR diffusometry shows that, in the temperature range from 213 to 353 K, the 1H self-diffusion coefficient of the co-PNIS70/30 membrane is about one third of the diffusion coefficient of Nafion® at the same humidity. However, temperature dependences of proton conductivities of Nafion® and of co-PNIS70/30 membranes are nearly identical. Membrane–electrode assemblies (MEAs) based on co-PNIS70/30 were fabricated by different procedures. The optimal MEAs with co-PNIS70/30 membranes are characterized by maximum output power of ~370 mW/cm² at 80 °C. It allows considering sulfonated co-PNIS70/30 polynaphthoyleneimides membrane attractive for practical applications.

Journal or Publication Title: Materials
Volume of the journal: 13
Issue Number: 22
Publisher: MDPI
Collation: 11 Seiten
Uncontrolled Keywords: sulfonated polynaphthoyleneimides membrane, proton conductivity, water self-diffusion coefficient, NMR diffusometry, membrane–electrode assembly, current–voltage characteristic, MEA power output
Classification DDC: 500 Naturwissenschaften und Mathematik > 530 Physik
500 Naturwissenschaften und Mathematik > 540 Chemie
Divisions: 05 Department of Physics > Institute for Condensed Matter Physics
Date Deposited: 07 Feb 2022 12:30
Last Modified: 02 May 2022 12:07
DOI: 10.26083/tuprints-00017438
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-174387
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/17438
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