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Self-crosslinked alkaline polyelectrolyte membranes with exceptional stability under dry-wet alternating conditions.

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Title: Self-crosslinked alkaline polyelectrolyte membranes with exceptional stability under dry-wet alternating conditions.
Authors: Ning, Tianshu1 (AUTHOR), Hu, Yang1 (AUTHOR), Ren, Renjie1 (AUTHOR), Yi, Zhengyuan1 (AUTHOR), Wang, Gongwei1 (AUTHOR), Xiao, Li1 (AUTHOR) chem.lily@whu.edu.cn, Lu, Juntao1 (AUTHOR), Zhuang, Lin1 (AUTHOR) lzhuang@whu.edu.cn
Source: Journal of Membrane Science. Nov2023, Vol. 685, pN.PAG-N.PAG. 1p.
Subjects: Alkaline fuel cells, Ionic conductivity, Superionic conductors, Power density
Abstract: The emergence of alkaline polyelectrolytes (APEs) with high stability and high ionic conductivity has greatly improved the power density of alkaline polyelectrolyte fuel cells (APEFCs), now the cell stability has become an urgent problem to be addressed. The uneven distribution of humidity and hydration state inside large-scale electrodes will cause the membrane to swell and shrink repeatedly, resulting in the membrane rupture and/or the peeling off of catalyst layers, which is a fatal problem affecting the stability of APEFCs. In the present work, we report a new APE, self-crosslinked quaternary ammonia poly (N-methyl-piperidine-terphenyl and 7-bromo-tri-fluoro-heptanone), denoted as x QAPTF. The crosslinking network inside the membrane can be formed without introducing additional crosslinking agents, and can effectively limit the membrane swelling degree in water (only 4% at 80oC). More importantly, the x QAPTF membranes exhibit excellent mechanical strength and flexibility even after multiple all-wet-all-dry cycles. Under the dry-wet alternating condition (RH repeatedly switched between 100% and 50%), the APEFC using x QAPTF membrane run stably, with the cell voltage switching accordingly and steadily. Such a unique quality of APE membranes has so far not been reported in the literature, which strongly enhances the practicality of APEs, as well as the APEFC and relevant technologies. [Display omitted] •Self-crosslinked alkaline polyelectrolyte membrane. •High in mechanical strength and low in swelling degree. •Exceptionally stable under dry-wet alternating conditions. •An important step towards practical application of APEFC. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Membrane Science is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 170044282
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PubType: Academic Journal
PubTypeId: academicJournal
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Self-crosslinked alkaline polyelectrolyte membranes with exceptional stability under dry-wet alternating conditions.
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  Data: <searchLink fieldCode="AR" term="%22Ning%2C+Tianshu%22">Ning, Tianshu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hu%2C+Yang%22">Hu, Yang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ren%2C+Renjie%22">Ren, Renjie</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yi%2C+Zhengyuan%22">Yi, Zhengyuan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Gongwei%22">Wang, Gongwei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xiao%2C+Li%22">Xiao, Li</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> chem.lily@whu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Lu%2C+Juntao%22">Lu, Juntao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhuang%2C+Lin%22">Zhuang, Lin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> lzhuang@whu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Membrane+Science%22">Journal of Membrane Science</searchLink>. Nov2023, Vol. 685, pN.PAG-N.PAG. 1p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Alkaline+fuel+cells%22">Alkaline fuel cells</searchLink><br /><searchLink fieldCode="DE" term="%22Ionic+conductivity%22">Ionic conductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Superionic+conductors%22">Superionic conductors</searchLink><br /><searchLink fieldCode="DE" term="%22Power+density%22">Power density</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The emergence of alkaline polyelectrolytes (APEs) with high stability and high ionic conductivity has greatly improved the power density of alkaline polyelectrolyte fuel cells (APEFCs), now the cell stability has become an urgent problem to be addressed. The uneven distribution of humidity and hydration state inside large-scale electrodes will cause the membrane to swell and shrink repeatedly, resulting in the membrane rupture and/or the peeling off of catalyst layers, which is a fatal problem affecting the stability of APEFCs. In the present work, we report a new APE, self-crosslinked quaternary ammonia poly (N-methyl-piperidine-terphenyl and 7-bromo-tri-fluoro-heptanone), denoted as x QAPTF. The crosslinking network inside the membrane can be formed without introducing additional crosslinking agents, and can effectively limit the membrane swelling degree in water (only 4% at 80oC). More importantly, the x QAPTF membranes exhibit excellent mechanical strength and flexibility even after multiple all-wet-all-dry cycles. Under the dry-wet alternating condition (RH repeatedly switched between 100% and 50%), the APEFC using x QAPTF membrane run stably, with the cell voltage switching accordingly and steadily. Such a unique quality of APE membranes has so far not been reported in the literature, which strongly enhances the practicality of APEs, as well as the APEFC and relevant technologies. [Display omitted] •Self-crosslinked alkaline polyelectrolyte membrane. •High in mechanical strength and low in swelling degree. •Exceptionally stable under dry-wet alternating conditions. •An important step towards practical application of APEFC. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Membrane Science is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
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      – Type: doi
        Value: 10.1016/j.memsci.2023.121900
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Alkaline fuel cells
        Type: general
      – SubjectFull: Ionic conductivity
        Type: general
      – SubjectFull: Superionic conductors
        Type: general
      – SubjectFull: Power density
        Type: general
    Titles:
      – TitleFull: Self-crosslinked alkaline polyelectrolyte membranes with exceptional stability under dry-wet alternating conditions.
        Type: main
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          Name:
            NameFull: Ning, Tianshu
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            NameFull: Hu, Yang
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            NameFull: Ren, Renjie
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            NameFull: Yi, Zhengyuan
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            NameFull: Wang, Gongwei
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            NameFull: Xiao, Li
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            NameFull: Lu, Juntao
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          Dates:
            – D: 05
              M: 11
              Text: Nov2023
              Type: published
              Y: 2023
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            – Type: issn-print
              Value: 03767388
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              Value: 685
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            – TitleFull: Journal of Membrane Science
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