Ex situ aging effect on sulfonated poly(ether ether ketone) membrane : Hydration-dehydration cycling and hydrothermal treatment
(2022) In Journal of Energy Chemistry 70. p.583-592- Abstract
Prolonged hydrothermal treatment for sulfonated poly(ether ether ketone) membranes induces mechanical degradation and developing hydrophilic-hydrophobic phase separation, simultaneously. The enhanced phase separation provides incremental proton conductivity to the membranes, whereas mechanical degradation drastically reduces device stability. On this basis, we describe here the effects of two different ex situ aging processes on sulfonated poly(ether ether ketone) membranes: hydration-dehydration cycling and prolonged hydrothermal treatment. Both aged membranes exhibited enhanced phase separation under the hydrated conditions, as characterized by small angle X-ray scattering. However, when the aged membranes were dried again, the... (More)
Prolonged hydrothermal treatment for sulfonated poly(ether ether ketone) membranes induces mechanical degradation and developing hydrophilic-hydrophobic phase separation, simultaneously. The enhanced phase separation provides incremental proton conductivity to the membranes, whereas mechanical degradation drastically reduces device stability. On this basis, we describe here the effects of two different ex situ aging processes on sulfonated poly(ether ether ketone) membranes: hydration-dehydration cycling and prolonged hydrothermal treatment. Both aged membranes exhibited enhanced phase separation under the hydrated conditions, as characterized by small angle X-ray scattering. However, when the aged membranes were dried again, the nanostructure of the membranes aged via the hydration-dehydration cycling was recoverable, whereas that of the membranes aged via prolonged hydrothermal treatment was irreversible. Furthermore, the two differently aged membranes showed clear differences in thermal, mechanical, and electrochemical properties. Finally, we implemented both aged membranes in fuel cell application. The sample aged via hydration-dehydration cycling maintained its improved cell performance, whereas the sample aged via hydrothermal treatment showed drastically reduced cell performance after durability test for 50 h.
(Less)
- author
- Choi, Seung Young LU and Jin, Kyeong Sik
- organization
- publishing date
- 2022-07
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Ex situ aging, Fuel cell, Humidity cycle test, Proton exchange membrane, Sulfonated poly(ether ether ketone)
- in
- Journal of Energy Chemistry
- volume
- 70
- pages
- 10 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:85128219444
- ISSN
- 2095-4956
- DOI
- 10.1016/j.jechem.2022.03.003
- language
- English
- LU publication?
- yes
- id
- a913da40-4119-436f-b8af-55877767d1a8
- date added to LUP
- 2022-06-17 15:36:59
- date last changed
- 2022-06-17 17:00:31
@article{a913da40-4119-436f-b8af-55877767d1a8,
abstract = {{<p>Prolonged hydrothermal treatment for sulfonated poly(ether ether ketone) membranes induces mechanical degradation and developing hydrophilic-hydrophobic phase separation, simultaneously. The enhanced phase separation provides incremental proton conductivity to the membranes, whereas mechanical degradation drastically reduces device stability. On this basis, we describe here the effects of two different ex situ aging processes on sulfonated poly(ether ether ketone) membranes: hydration-dehydration cycling and prolonged hydrothermal treatment. Both aged membranes exhibited enhanced phase separation under the hydrated conditions, as characterized by small angle X-ray scattering. However, when the aged membranes were dried again, the nanostructure of the membranes aged via the hydration-dehydration cycling was recoverable, whereas that of the membranes aged via prolonged hydrothermal treatment was irreversible. Furthermore, the two differently aged membranes showed clear differences in thermal, mechanical, and electrochemical properties. Finally, we implemented both aged membranes in fuel cell application. The sample aged via hydration-dehydration cycling maintained its improved cell performance, whereas the sample aged via hydrothermal treatment showed drastically reduced cell performance after durability test for 50 h.</p>}},
author = {{Choi, Seung Young and Jin, Kyeong Sik}},
issn = {{2095-4956}},
keywords = {{Ex situ aging; Fuel cell; Humidity cycle test; Proton exchange membrane; Sulfonated poly(ether ether ketone)}},
language = {{eng}},
pages = {{583--592}},
publisher = {{Elsevier}},
series = {{Journal of Energy Chemistry}},
title = {{Ex situ aging effect on sulfonated poly(ether ether ketone) membrane : Hydration-dehydration cycling and hydrothermal treatment}},
url = {{http://dx.doi.org/10.1016/j.jechem.2022.03.003}},
doi = {{10.1016/j.jechem.2022.03.003}},
volume = {{70}},
year = {{2022}},
}