A Polyketone-based Anion Exchange Membrane for Electrochemical Applications: Synthesis and Characterization

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• 作者：Narges Ataollahi^a ; Keti Vezzù ; ^b ; Graeme Nawn^b ; Giuseppe Pace^c ; Gianni Cavinato^d ; Fabrizio Girardi^a ; Paolo Scardi^a ; Vito Di Noto^b ; ^c ; ^{vito.dinoto@unipd.it} ; Rosa Di Maggio^a ; ^{rosa.dimaggio@unitn.it}
• 关键词：Polyketone ; Polyamines ; Anion exchange membrane ; Conductivity
• 刊名：Electrochimica Acta
• 出版年：2017
• 出版时间：1 February 2017
• 年：2017
• 卷：226
• 期：Complete
• 页码：148-157
• 全文大小：1662 K
• 卷排序：226

文摘

An anion exchange membrane (AEM) was made with a modified polyketone (PK). AEMs of polyamines were prepared in a three-step procedure: (I) PK synthesis using ethylene and carbon monoxide, supported by a Pd catalyst, followed by the introduction of 1,2-diaminopropane to yield the polymeric amines; (II) solvent casting of the modified PK with a low degree of amination; (III) iodomethylation to form the AEM (PK-PDAPm(I)), followed by ion exchange with KOH (PK-PDAPm(OH)).The structure of the modified polyketone was characterized using FT-IR, and UV–vis spectroscopy, demonstrating the successful introduction of amine in the PK. The conductivity of the AEM was studied using broadband electric spectroscopy (BES) in the temperature range from −100 to 120 °C: the highest value of 9 × 10−4 S·cm−1 was reached at 120 °C for the ionic conductivity of PK-PDAPm(I), followed by PK-PDAPm(OH) with values of the same order of magnitude (10−4 S·cm−1). Thermogravimetry showed that the material is thermally stable up to 200 °C.