Pre-swelling of FAA3 membranes with water-based ethylene glycol solution to minimize dimensional changes after assembly into a water electrolyser: Effect on properties and performance

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43928483" target="_blank" >RIV/60461373:22310/23:43928483 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0376738822010894?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0376738822010894?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.memsci.2022.121344" target="_blank" >10.1016/j.memsci.2022.121344</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Pre-swelling of FAA3 membranes with water-based ethylene glycol solution to minimize dimensional changes after assembly into a water electrolyser: Effect on properties and performance

Popis výsledku v původním jazyce

Stability of membranes in electrolysers is challenged by dimensional changes, when dry membranes are assembled and wetted when the electrolyser starts. Assembling wet membranes is challenging because water evaporates during handling. To minimize dimensional changes, FAA3 membranes are pre-swollen in aqueous ethylene glycol (EG, boiling point 197°C). Membranes partially dissolve in 100 vol% EG, and swell excessively in 70 vol%. Swelling in 50 vol% shows smallest dimensional changes during handling (shrink) and re-immersion in KOH solution (swelling, mimicking start of the electrolyser). These membranes show about 30% higher conductivity (ca. 65 mS cm−1). Tensile strength and Young&apos;s Modulus decrease exponentially with the amount of absorbed EG solution, while elongation at break increases. In addition to the improved dimensional stability during handling, EG treated membranes perform better in the electrolyser than untreated membranes. In a stability test over 120 h at 250 mA/cm2, all membranes show an initial drop in the cell voltage and then stabilize. © 2023 The Authors

Název v anglickém jazyce

Pre-swelling of FAA3 membranes with water-based ethylene glycol solution to minimize dimensional changes after assembly into a water electrolyser: Effect on properties and performance

Popis výsledku anglicky

Stability of membranes in electrolysers is challenged by dimensional changes, when dry membranes are assembled and wetted when the electrolyser starts. Assembling wet membranes is challenging because water evaporates during handling. To minimize dimensional changes, FAA3 membranes are pre-swollen in aqueous ethylene glycol (EG, boiling point 197°C). Membranes partially dissolve in 100 vol% EG, and swell excessively in 70 vol%. Swelling in 50 vol% shows smallest dimensional changes during handling (shrink) and re-immersion in KOH solution (swelling, mimicking start of the electrolyser). These membranes show about 30% higher conductivity (ca. 65 mS cm−1). Tensile strength and Young&apos;s Modulus decrease exponentially with the amount of absorbed EG solution, while elongation at break increases. In addition to the improved dimensional stability during handling, EG treated membranes perform better in the electrolyser than untreated membranes. In a stability test over 120 h at 250 mA/cm2, all membranes show an initial drop in the cell voltage and then stabilize. © 2023 The Authors

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

—

Návaznosti

R - Projekt Ramcoveho programu EK

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

JOURNAL OF MEMBRANE SCIENCE

ISSN

0376-7388

e-ISSN

1873-3123

Svazek periodika

670

Číslo periodika v rámci svazku

121344

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

—

Kód UT WoS článku

000921537500001

EID výsledku v databázi Scopus

2-s2.0-85145822831