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Pristine and modified porous membranes for zinc slurry–air flow battery

Tsehaye, Misgina Tilahun; Gebreslassie, Getachew Teklay; Choi, Nak Heon 1; Milian, Diego; Martin, Vincent; Fischer, Peter; Tübke, Jens 1; Kissi, Nadia El; Donten, Mateusz L.; Alloin, Fannie; Iojoiu, Cristina
1 Institut für Mechanische Verfahrenstechnik und Mechanik (MVM), Karlsruher Institut für Technologie (KIT)


The membrane is a crucial component of Zn slurry–air flow battery since it provides ionic conductivity between the electrodes while avoiding the mixing of the two compartments. Herein, six commercial membranes (Cellophane™ 350PØØ, Zirfon®, Fumatech® PBI, Celgard® 3501, 3401 and 5550) were first characterized in terms of electrolyte uptake, ion conductivity and zincate ion crossover, and tested in Zn slurry–air flow battery. The peak power density of the battery employing the membranes was found to depend on the in-situ cell resistance. Among them, the cell using Celgard® 3501 membrane, with in-situ area resistance of 2 Ω cm$^{2}$ at room temperature displayed the highest peak power density (90 mW cm−2). However, due to the porous nature of most of these membranes, a significant crossover of zincate ions was observed. To address this issue, an ion-selective ionomer containing modified poly(phenylene oxide) (PPO) and N-spirocyclic quaternary ammonium monomer was coated on a Celgard® 3501 membrane and crosslinked via UV irradiation (PPO-3.45 + 3501). Moreover, commercial FAA-3 solutions (FAA, Fumatech) were coated for comparison purpose. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000136098
Veröffentlicht am 09.08.2021
DOI: 10.3390/molecules26134062
Zitationen: 13
Web of Science
Zitationen: 10
Zitationen: 11
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mechanische Verfahrenstechnik und Mechanik (MVM)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 1420-3049
KITopen-ID: 1000136098
Erschienen in Molecules
Verlag MDPI
Band 26
Heft 13
Seiten Art. Nr.: 4062
Vorab online veröffentlicht am 02.07.2021
Schlagwörter zinc slurry–air flow battery; membrane coating; UV irradiation; zincate crossover; power density
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