High performing hydroxide exchange membranes with flexible tetra-piperidinium side chains linked by alkyl spacers
Dang, Hai Son LU and Jannasch, Patric LU
(2018)
In ACS Applied Energy Materials
1(5).
p.2222-2231
- Abstract
- The objective of the present work is to, in a single material, combine a number of molecular design strategies that have proven successful in the preparation of high-performance anionexchange membranes (AEMs) for alkaline fuel cells. Hence, we here report on highly conductive and alkali-stable poly(phenylene oxide)s carrying flexible side chains attached via alkyl spacer units, where each side chain contains four quaternary piperidinium (QPip) cations with interconnecting alkyl chain segments. These materials are completely soluble in, e.g., methanol and form mechanically tough transparent AEMs with efficiently segregated ions, as indicated by X-ray scattering. At 80 °C, the hydroxide ion conductivity reaches up to 170 and 221 mS... (More)
- The objective of the present work is to, in a single material, combine a number of molecular design strategies that have proven successful in the preparation of high-performance anionexchange membranes (AEMs) for alkaline fuel cells. Hence, we here report on highly conductive and alkali-stable poly(phenylene oxide)s carrying flexible side chains attached via alkyl spacer units, where each side chain contains four quaternary piperidinium (QPip) cations with interconnecting alkyl chain segments. These materials are completely soluble in, e.g., methanol and form mechanically tough transparent AEMs with efficiently segregated ions, as indicated by X-ray scattering. At 80 °C, the hydroxide ion conductivity reaches up to 170 and 221 mS cm-1 at ion exchange capacities (IECs) of 2.1 and 2.6 mequiv g-1, respectively. Taking into account the IEC value and water uptake, the tetra-QPip side chain AEMs are found to be significantly more efficient hydroxide ion conductors than corresponding AEMs with mono-QPip side chains. Both the IEC value and hydroxide conductivity of the AEMs show a minor decrease after storage in 1 M aq NaOH at 90 °C during 240 h. However, this decline is not associated with any ionic loss or polymer structure degradation, as confirmed by 1H NMR spectroscopy and thermogravimetrical analysis, even after 380 h storage under the same conditions. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/5cae9f5b-dc4b-4afc-bd24-586efb8600eb
- author
- Dang, Hai Son
LU
and Jannasch, Patric
LU
- organization
- publishing date
- 2018
- type
- Contribution to journal
- publication status
- published
- subject
- in
- ACS Applied Energy Materials
- volume
- 1
- issue
- 5
- pages
- 10 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- scopus:85050265372
- ISSN
- 2574-0962
- DOI
- 10.1021/acsaem.8b00294
- language
- English
- LU publication?
- yes
- additional info
- Publication Date (Web): April 20, 2018
- id
- 5cae9f5b-dc4b-4afc-bd24-586efb8600eb
- date added to LUP
- 2018-04-20 23:37:23
- date last changed
- 2022-04-01 23:55:32
@article{5cae9f5b-dc4b-4afc-bd24-586efb8600eb,
abstract = {{The objective of the present work is to, in a single material, combine a number of molecular design strategies that have proven successful in the preparation of high-performance anionexchange membranes (AEMs) for alkaline fuel cells. Hence, we here report on highly conductive and alkali-stable poly(phenylene oxide)s carrying flexible side chains attached via alkyl spacer units, where each side chain contains four quaternary piperidinium (QPip) cations with interconnecting alkyl chain segments. These materials are completely soluble in, e.g., methanol and form mechanically tough transparent AEMs with efficiently segregated ions, as indicated by X-ray scattering. At 80 °C, the hydroxide ion conductivity reaches up to 170 and 221 mS cm<sup>-1</sup> at ion exchange capacities (IECs) of 2.1 and 2.6 mequiv g<sup>-1</sup>, respectively. Taking into account the IEC value and water uptake, the tetra-QPip side chain AEMs are found to be significantly more efficient hydroxide ion conductors than corresponding AEMs with mono-QPip side chains. Both the IEC value and hydroxide conductivity of the AEMs show a minor decrease after storage in 1 M aq NaOH at 90 °C during 240 h. However, this decline is not associated with any ionic loss or polymer structure degradation, as confirmed by <sup>1</sup>H NMR spectroscopy and thermogravimetrical analysis, even after 380 h storage under the same conditions.}},
author = {{Dang, Hai Son and Jannasch, Patric}},
issn = {{2574-0962}},
language = {{eng}},
number = {{5}},
pages = {{2222--2231}},
publisher = {{The American Chemical Society (ACS)}},
series = {{ACS Applied Energy Materials}},
title = {{High performing hydroxide exchange membranes with flexible tetra-piperidinium side chains linked by alkyl spacers}},
url = {{http://dx.doi.org/10.1021/acsaem.8b00294}},
doi = {{10.1021/acsaem.8b00294}},
volume = {{1}},
year = {{2018}},
}