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首页> 外文期刊>Advanced Functional Materials >Opening Doors to Future Electrochemical Energy Devices: The An ion-Conducting Polyketone Polyelectrolytes
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Opening Doors to Future Electrochemical Energy Devices: The An ion-Conducting Polyketone Polyelectrolytes

机译：通往未来电化学能源设备的大门：离子导电聚酮聚电解质

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摘要

The numerous potential benefits of incorporating anion-exchange membranes (AEMs), in place of proton-exchange membranes (PEMs), in energy storage and conversion technologies renders their development of fundamental importance for the continued evolution of alternative energy systems. However, the widespread implementation of AEMs is currently plagued by a range of problems including lower conductivity (with respect to PEMs), poor stability, and high cost. This study reports the conversion of polyketone, one of the world's most mass produced and cheap polymers, to a new highly tuneable polymer architecture, functionalized polyketone (FPK), that demonstrates a range of excellent properties rendering it a significant prospect for AEM materials. The thermal, processing, and ion-conducting properties of FPK are governed by the amount and nature of the newly formed N-substituted pyrrole pendant side groups. At 80 degrees C, the quarternized pyridyl FPK derivative (4MPyrFPK) yields ion-conductivities of 8.6 and 10.5 mS cm(-1) in the iodide and hydroxide forms. In addition, the hydroxide form of 4MPyr-FPK demonstrates remarkable stability toward the typically problematic alkaline conditions. No chemical decomposition is observed to the membrane after imbibing it in KOH solution for 72 h, and furthermore, the ion-conductivity is demonstrated to remain constant for at least 30 d at 80 degrees C.
机译：将阴离子交换膜（AEM）代替质子交换膜（PEM）用于能量存储和转换技术具有众多潜在优势，这使其发展对于替代能源系统的持续发展具有根本重要性。但是，目前AEM的广泛实施受到一系列问题的困扰，包括电导率较低（相对于PEM），稳定性差和成本高。这项研究报告说，聚酮是世界上生产量最大，价格最便宜的聚合物之一，已转变为一种新型的高度可调的聚合物结构，即功能化聚酮（FPK），它显示出一系列优异的性能，使其成为AEM材料的重要前景。 FPK的热，加工和离子传导性能受新形成的N-取代吡咯侧基侧基的数量和性质支配。在80摄氏度下，季铵化吡啶基FPK衍生物（4MPyrFPK）在碘化物和氢氧化物形式下产生的离子电导率为8.6和10.5 mS cm（-1）。另外，氢氧化物形式的4MPyr-FPK表现出对典型问题碱性条件的显着稳定性。将膜吸收在KOH溶液中72小时后，未观察到膜发生化学分解，此外，离子电导率在80摄氏度下至少保持30 d不变。

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