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Imidazolium-Based Anion Exchange Membranes for Alkaline Anion Fuel Cells: (2) Elucidation of the Ionic Structure and its Impact on Conducting Properties
https://repo.qst.go.jp/records/48411
https://repo.qst.go.jp/records/4841168d8d881-a353-4c4d-a09a-d02e8b42d990
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2017-12-07 | |||||
| タイトル | ||||||
| タイトル | Imidazolium-Based Anion Exchange Membranes for Alkaline Anion Fuel Cells: (2) Elucidation of the Ionic Structure and its Impact on Conducting Properties | |||||
| 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 |
吉村, 公男
× 吉村, 公男× ザオ, ユエ× 長谷川, 伸× 廣木, 章博× Kishiyama, Yoshihiro× Shishitani, Hideyuki× Yamaguchi, Susumu× Tanaka, Hirohisa× Koizumi, Satoshi× Appavou, Marie-Sousai× Radulescu, Aurel× Richter, Dieter× 前川, 康成× 吉村 公男× ザオ ユエ× 長谷川 伸× 廣木 章博× 前川 康成 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In our previous study (Soft Matter 2016, 12, 1567), the relationship between the morphology and properties of graft-type imidazolium-based anion exchange membranes (AEMs) was revealed, in that the semi-crystalline features of the polymer matrix maintain its mechanical properties and the formation of interconnected hydrophilic domains promotes the membrane conductivity. Here, we report the novel ionic structure of the same graft-type AEMs with different grafting degrees, analyzed using a small-angle X-ray scattering method under different relative humidity (RH) conditions. The characteristic “ionomer peak” with a corresponding correlation distance of approximately 1.0 nm was observed at RH < 80%. This distance is much smaller than the literature-reported mean distance between two ionic clusters, but close to the Bjerrum length of water. Since the representative number of water molecules per cation, nw, was small, we proposed that dissociated ion-pairs are distributed in the hydrophilic domains (ion-channels). At RH < 80%, ion-channels are disconnected, however in liquid water, they are well-connected as evidenced by the sharp increase in nw. The disconnected ion-channels even under relatively high RH conditions should be a substantial factor for the low power generation efficiency of AEM-type fuel cells. | |||||
| 書誌情報 |
Soft Matter 巻 13, 号 45, p. 8463-8473, 発行日 2017-12 |
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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 | 1744-683X | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1039/C7SM01774J | |||||
| 関連サイト | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | http://dx.doi.org/10.1039/C7SM01774J | |||||
| 関連名称 | http://dx.doi.org/10.1039/C7SM01774J | |||||
