School of Chemistry and Chemical Engineering, Shandong University, No. 27 Shanda South Road, Jinan 250100, China.
Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang 262700, China.
Molecules. 2022 Jun 26;27(13):4110. doi: 10.3390/molecules27134110.
Developing a low-cost and effective proton-conductive electrolyte to meet the requirements of the large-scale manufacturing of proton exchange membrane (PEM) fuel cells is of great significance in progressing towards the upcoming "hydrogen economy" society. Herein, utilizing the one-pot acylation polymeric combination of acyl chloride and amine precursors, a polyamide with in-built -SOH moieties () was facilely synthesized. Characterization shows that it possesses a porous feature and a high stability at the practical operating conditions of PEM fuel cells. Investigations of electrochemical impedance spectroscopy (EIS) measurements revealed that the fabricated displays a proton conductivity of up to 8.85 × 10 S·cm at 353 K under 98% relative humidity (RH), which is more than two orders of magnitude higher than that of its -SOH-free analogue, (6.30 × 10 S·cm), under the same conditions. Therefore, matrix-mixed membranes were fabricated by mixing with polyacrylonitrile (PAN) in different ratios, and the EIS analyses revealed that its proton conductivity can reach up to 4.90 × 10 S·cm at 353 K and a 98% relative humidity (RH) when the weight ratio of :PAN is 3:1 (labeled as ), the value of which is even comparable with those of commercial-available electrolytes being used in PEM fuel cells. Additionally, continuous tests showed that possesses a long-life reusability. This work demonstrates, using the simple acylation reaction with the sulfonated module as precursor, that low-cost and highly effective proton-conductive electrolytes for PEM fuel cells can be facilely achieved.
开发一种低成本且有效的质子导电电解质以满足质子交换膜（PEM）燃料电池大规模制造的要求，对于迈向即将到来的“氢能经济”社会具有重要意义。在此，通过酰氯和胺前体的一锅法酰化聚合组合，简便地合成了具有内置-SOH 部分的聚酰胺（）。表征表明，它具有多孔特征和在 PEM 燃料电池的实际工作条件下的高稳定性。电化学阻抗谱（EIS）测量的研究表明，在 98%相对湿度（RH）下 353 K 时，所制备的 显示出高达 8.85×10 S·cm 的质子电导率，比其在相同条件下无-SOH 类似物 （6.30×10 S·cm）高出两个数量级以上。因此，通过以不同比例与聚（丙烯腈）（PAN）混合来制备基质混合膜，EIS 分析表明当 :PAN 的重量比为 3:1（标记为 ）时，其质子电导率在 353 K 和 98%相对湿度（RH）下可达到 4.90×10 S·cm，其值甚至可与在 PEM 燃料电池中使用的商业可用电解质相媲美。此外，连续测试表明 具有长寿命的可重复使用性。这项工作表明，使用磺化模块作为前驱体的简单酰化反应，可以简便地获得用于 PEM 燃料电池的低成本且高效的质子导电电解质。
