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A long side chain imidazolium-based graft-type anion-exchange membrane: novel electrolyte and alkaline-durable properties and structural elucidation using SANS contrast variation
https://repo.qst.go.jp/records/80534
https://repo.qst.go.jp/records/8053465e8b15c-22bf-44da-85d3-244d35411378
| アイテムタイプ | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-09-23 | |||||
| タイトル | ||||||
| タイトル | A long side chain imidazolium-based graft-type anion-exchange membrane: novel electrolyte and alkaline-durable properties and structural elucidation using SANS contrast variation | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Zhao, Yue
× Zhao, Yue× Yoshimura, Kimio× Mohamed Ahmed Mahmoud, Ahmed× Hwan-Chul, Yu× Okushima, Shun× Hiroki, Akihiro× Kishiyama, Yoshihiro× Shishitani, Hideyuki× Yamaguchi, Susumu× Tanaka, Hirohisa× Noda, Yohei× Koizumi, Satoshi× Radulescu, Aurel× Maekawa, Yasunari× Zhao, Yue× Yoshimura, Kimio× Okushima, Shun× Hiroki, Akihiro× Maekawa, Yasunari |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Newly designed styrylimidazolium-based grafted anion-exchange membranes (StIm-AEMs), in which imidazolium ionic groups are attached to styrene at the far side from the graft chains, were prepared by radiation-induced graft polymerization of p-(2-imidazoliumyl) styrene onto poly(ethylene-cotetrafluoloethylene) (ETFE) films, followed by N-alkylation and ion-exchange reactions. StIm-AEM having an ion exchange capacity (IEC) of 0.54 mmol g1 with a grafting degree (GD) of B18%, possesses practical conductivity (450 mS/cm) even with a very low water uptake (10%) and high stability over 600 h in a 1 M KOH solution at 80 1C. There exists a critical IEC (IECc) in the range of 0.7–0.8 mmol/g over which the membrane showed high water uptake, which resulted in pronounced susceptibility to hydrolysis. Using small-angle neutron scattering technique with a contrast variation method, we found the hydrophilic phase in StIm-AEMs with IECs lower and higher than IECc shows ‘‘reverse-micelles’’ with water domains dispersed in the polymer matrix and ‘‘micelles’’ with graft polymer aggregates dispersed in the water matrix, respectively. The further analysis of micelle structures using the hard-sphere liquid model and Porod limit analysis reveals that the interfacial structures of ionic groups are essential for the electrochemical properties and durability of StIm-AEMs. In addition, StIm-AEM with an IEC of 0.95 mmol/g and the maximum power density of 80 mW/cm2 in the hydrazine hydrate fuel cell test, exhibited long-term durability under constant current (8.0 mA) up to 455 h, which, thus far, is the best durability at 80 C for platinum-free alkaline-type liquid fuel cells. |
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| 書誌情報 |
soft matter 巻 16, 号 35, p. 8128-8143, 発行日 2020-09 |
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| 出版者 | ||||||
| 出版者 | Royal Society of Chemistry | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 1744-6848 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1039/D0SM00947D | |||||
| 関連サイト | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1039/D0SM00947D | |||||
