Basicity‐dependent properties of anion conducting membranes consisting of iminium cations for alkaline fuel cells,Journal of Polymer Science Part A: Polymer Chemistry

当前位置： X-MOL 学术 › J. Polym. Sci. A Polym. Chem. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Basicity‐dependent properties of anion conducting membranes consisting of iminium cations for alkaline fuel cells
Journal of Polymer Science Part A: Polymer Chemistry Pub Date : 2018-11-29 , DOI: 10.1002/pola.29288
Beom-Seok Ko _{1,

2} , Kimio Yoshimura ₁ , Sinananwanich Warapon ₁ , Hideyuki Shishitani ₃ , Susumu Yamaguchi ₃ , Hirohisa Tanaka ₃ , Yasunari Maekawa _{1,

2}

Affiliation

To design novel anion‐conducting polymer electrolyte membranes (AEMs), this paper proposes a basicity index (BI) that is defined by the ion‐exchange ratios of AEMs from the OH⁻ to Cl⁻ forms in a neutral aqueous solution as a parameter for Arrhenius basicity (dissociation constant). Using a radiation‐induced graft polymerization technique, three iminium cations are introduced into fluorinated polymer films. The BI of the iminium‐containing AEMs is less than that of a conventional ammonium‐type AEM. The conductivity and water uptake correlate positively with the BI, whereas the thermal and chemical stabilities correlate negatively with the BI. The dependence on the BI stems from the stabilization of the iminium hydroxide in proportion to the basicity of the original diaza‐compounds, resulting in a decrease in conductivity and water uptake with keeping higher thermal and chemical stabilities. Notably, ion conductivity is sufficient and water uptake is less in AEMs with a medium BI. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019, 57, 503–510

中文翻译：

碱性燃料电池的由亚胺阳离子组成的阴离子导电膜的碱性依赖性

为了设计新颖的阴离子传导性聚合物电解质膜（的AEM），本文提出了通过从OH的AEM的离子交换比率限定的碱度指数（BI）^-对氯^-在中性水溶液中形成Arrhenius碱度（离解常数）的参数。使用辐射诱导的接枝聚合技术，将三个亚胺阳离子引入到氟化聚合物薄膜中。含亚胺的AEM的BI小于常规铵型AEM的BI。电导率和吸水率与BI呈正相关，而热稳定性和化学稳定性与BI呈负相关。对BI的依赖源于氢氧化亚胺的稳定度与原始二氮杂化合物的碱度成正比，导致电导率和吸水率下降，同时保持较高的热稳定性和化学稳定性。值得注意的是，在中等BI的AEM中，离子电导率足够，吸水率也较低。©2018 Wiley Periodicals，Inc.J.Polym。科学 A部分：Polym。化学2019，57，503-510

更新日期：2018-11-29

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文