Abstract
In order to systematically study how the arrangement of cations on the side chain and length of alkyl spacers between cations impact the performance of multi-cation AEMs for alkaline fuel cells, a series of polyphenylene oxide (PPO)-based AEMs with different cationic side chains were synthesized. This work resulted in samples with two or three cations in a side chain pendant to the PPO backbone. More importantly, the length of the spacer between cations varied from 3 methylene (-CH2-) (C3) groups to 8 methylene (C8) groups. The highest conductivity, up to 99 mS/cm in liquid water at room temperature, was observed for the triple-cation side chain AEM with pentyl (C5) or hexyl (C6) spacers. The multi-cation AEMs were found to have decreased water uptake and ionic conductivity when the spacer chains between cations were lengthened from pentyl (C5) or hexyl (C6) to octyl (C8) linking groups. The triple-cation membranes with pentyl (C5) or hexyl (C6) groups between cations showed greatest stability after immersion in 1 M NaOH at 80 °C for 500 h.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 433-441 |
| Number of pages | 9 |
| Journal | Journal of Power Sources |
| Volume | 375 |
| DOIs | |
| State | Published - Jan 31 2018 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering
Cite this
}
Exploring backbone-cation alkyl spacers for multi-cation side chain anion exchange membranes. / Zhu, Liang; Yu, Xuedi; Hickner, Michael Anthony.
In: Journal of Power Sources, Vol. 375, 31.01.2018, p. 433-441.Research output: Contribution to journal › Article
TY - JOUR
T1 - Exploring backbone-cation alkyl spacers for multi-cation side chain anion exchange membranes
AU - Zhu, Liang
AU - Yu, Xuedi
AU - Hickner, Michael Anthony
PY - 2018/1/31
Y1 - 2018/1/31
N2 - In order to systematically study how the arrangement of cations on the side chain and length of alkyl spacers between cations impact the performance of multi-cation AEMs for alkaline fuel cells, a series of polyphenylene oxide (PPO)-based AEMs with different cationic side chains were synthesized. This work resulted in samples with two or three cations in a side chain pendant to the PPO backbone. More importantly, the length of the spacer between cations varied from 3 methylene (-CH2-) (C3) groups to 8 methylene (C8) groups. The highest conductivity, up to 99 mS/cm in liquid water at room temperature, was observed for the triple-cation side chain AEM with pentyl (C5) or hexyl (C6) spacers. The multi-cation AEMs were found to have decreased water uptake and ionic conductivity when the spacer chains between cations were lengthened from pentyl (C5) or hexyl (C6) to octyl (C8) linking groups. The triple-cation membranes with pentyl (C5) or hexyl (C6) groups between cations showed greatest stability after immersion in 1 M NaOH at 80 °C for 500 h.
AB - In order to systematically study how the arrangement of cations on the side chain and length of alkyl spacers between cations impact the performance of multi-cation AEMs for alkaline fuel cells, a series of polyphenylene oxide (PPO)-based AEMs with different cationic side chains were synthesized. This work resulted in samples with two or three cations in a side chain pendant to the PPO backbone. More importantly, the length of the spacer between cations varied from 3 methylene (-CH2-) (C3) groups to 8 methylene (C8) groups. The highest conductivity, up to 99 mS/cm in liquid water at room temperature, was observed for the triple-cation side chain AEM with pentyl (C5) or hexyl (C6) spacers. The multi-cation AEMs were found to have decreased water uptake and ionic conductivity when the spacer chains between cations were lengthened from pentyl (C5) or hexyl (C6) to octyl (C8) linking groups. The triple-cation membranes with pentyl (C5) or hexyl (C6) groups between cations showed greatest stability after immersion in 1 M NaOH at 80 °C for 500 h.
UR - http://www.scopus.com/inward/record.url?scp=85020799883&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85020799883&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2017.06.020
DO - 10.1016/j.jpowsour.2017.06.020
M3 - Article
VL - 375
SP - 433
EP - 441
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
ER -