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Construction of Novel Proton Transport Channels by Triphosphonic Acid Proton Conductor-Doped Crosslinked mPBI-Based High-Temperature and Low-Humidity Proton Exchange Membranes
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2021-02-10 , DOI: 10.1021/acssuschemeng.0c08799 Yan Wang 1 , Peng Sun 1 , Zhongfang Li 1 , Hui Guo 1 , Hongchang Pei 1 , Xiaoyan Yin 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2021-02-10 , DOI: 10.1021/acssuschemeng.0c08799 Yan Wang 1 , Peng Sun 1 , Zhongfang Li 1 , Hui Guo 1 , Hongchang Pei 1 , Xiaoyan Yin 1
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High proton conductivity and sufficient stability of the polybenzimidazole membrane are important for the application of high-temperature proton exchange membrane fuel cells (HT-PEMFCs). A series of composite membranes based on crosslinked mPBI (cPBI) with cerium 2,4,6-triphosphono-1,3,5-triazine (CeTPT) were resoundingly fabricated. Novel cPBI networks with tetrafunctional N,N,N′,N′-tetraglycidyl-4,4′-diaminodiphenylmethane (TGDDM) were synthesized. It is noteworthy that a new high-temperature proton conductor CeTPT was added. CeTPT contained three phosphonic acid groups, which offered good proton conductivity at moderate-to-low humidity and had good thermal stability. Tetrafunctional crosslinker TGDDM had multiple functional groups. With a relatively low crosslinking degree (CLD), the mechanical properties, dimensional stability, and oxidative resistance of the membranes were efficiently improved. The low CLD and good physicochemical stability also allowed high doping levels of CeTPT (up to 50%) and consequently high proton conductivity. At 180 °C and 50% RH, the proton conductivity of cPBI-5-CeTPT-50 and cPBI-10-CeTPT-50 was 0.072 and 0.068 S cm–1, respectively. The cPBI-CeTPT membranes showed good methanol resistance and membrane selectivity, and thus the membranes were suitable for direct methanol fuel cells.
中文翻译：
三膦酸质子导体掺杂的交联的基于mPBI的高温低湿质子交换膜的构建新型质子传输通道
聚苯并咪唑膜的高质子传导性和足够的稳定性对于高温质子交换膜燃料电池（HT-PEMFC）的应用很重要。彻底地制造了一系列基于交联的mPBI（cPBI）与2,4,6-三膦基-1,3,5-三嗪铈（CeTPT）的复合膜。合成了具有四官能N，N，N'，N'-四缩水甘油基-4,4'-二氨基二苯甲烷（TGDDM）的新型cPBI网络。值得注意的是，添加了新的高温质子导体CeTPT。CeTPT包含三个膦酸基团，在中低湿度下具有良好的质子传导性，并具有良好的热稳定性。四官能交联剂TGDDM具有多个官能团。具有相对较低的交联度（CLD），机械性能，尺寸稳定性，并有效提高了膜的抗氧化性。低的CLD和良好的理化稳定性也使CeTPT的掺杂水平高（高达50％），因此质子传导率也很高。在180°C和50％RH下，cPBI-5-CeTPT-50和cPBI-10-CeTPT-50的质子电导率分别为0.072和0.068 S cm分别为–1。cPBI-CeTPT膜显示出良好的耐甲醇性和膜选择性，因此该膜适用于直接甲醇燃料电池。
更新日期：2021-02-22
中文翻译：
三膦酸质子导体掺杂的交联的基于mPBI的高温低湿质子交换膜的构建新型质子传输通道
聚苯并咪唑膜的高质子传导性和足够的稳定性对于高温质子交换膜燃料电池（HT-PEMFC）的应用很重要。彻底地制造了一系列基于交联的mPBI（cPBI）与2,4,6-三膦基-1,3,5-三嗪铈（CeTPT）的复合膜。合成了具有四官能N，N，N'，N'-四缩水甘油基-4,4'-二氨基二苯甲烷（TGDDM）的新型cPBI网络。值得注意的是，添加了新的高温质子导体CeTPT。CeTPT包含三个膦酸基团，在中低湿度下具有良好的质子传导性，并具有良好的热稳定性。四官能交联剂TGDDM具有多个官能团。具有相对较低的交联度（CLD），机械性能，尺寸稳定性，并有效提高了膜的抗氧化性。低的CLD和良好的理化稳定性也使CeTPT的掺杂水平高（高达50％），因此质子传导率也很高。在180°C和50％RH下，cPBI-5-CeTPT-50和cPBI-10-CeTPT-50的质子电导率分别为0.072和0.068 S cm分别为–1。cPBI-CeTPT膜显示出良好的耐甲醇性和膜选择性，因此该膜适用于直接甲醇燃料电池。
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