Synthesis and characterization of TEMPO- and viologen-polymers for water-based redox-flow batteries

Redox-flow batteries that employ redox-active polymers (pRFB) represent a novel energy storage technology requiring innovative materials. Polymers bearing a viologen unit ( N , N ′-dialkyl-4,4′-bipyridines) or a TEMPO radical are synthesized. Acrylamide, poly(ethyleneglycol) methyl acrylates, di(eth...

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Published inPolymer chemistry Vol. 6; no. 45; pp. 7801 - 7811
Main Authors Janoschka, T., Morgenstern, S., Hiller, H., Friebe, C., Wolkersdörfer, K., Häupler, B., Hager, M. D., Schubert, U. S.
Format Journal Article
LanguageEnglish
Published 01.01.2015
Subjects
Acrylamide
Ammonium chlorides
Aqueous solutions
Dichlorides
Energy storage
Radicals
Storage batteries
Synthesis
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Summary:Redox-flow batteries that employ redox-active polymers (pRFB) represent a novel energy storage technology requiring innovative materials. Polymers bearing a viologen unit ( N , N ′-dialkyl-4,4′-bipyridines) or a TEMPO radical are synthesized. Acrylamide, poly(ethyleneglycol) methyl acrylates, di(ethylene glycol) methacrylate and 2-(methacryloyloxy)- N , N , N -trimethylethane ammonium chloride are studied as water-solubility-enhancing comonomers. The rheological and electrochemical properties of these polymers in aqueous solutions are evaluated, revealing poly(1-methyl-1′-(4-vinylbenzyl)-[4,4′-bipyridine]-1,1′-diium dichloride) ( P2a ) and poly(4-methacryloyloxy-2,2,6,6-tetramethylpiperidine-1-oxyl- co -2-(methacryloyloxy)- N , N , N -trimethylethane ammonium chloride) ( P4e ) to be most suited as anode and cathode materials, respectively, for a pRFB.
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ISSN:1759-9954
1759-9962
DOI:10.1039/C5PY01602A