High-performance layered double hydroxide/poly(2,6-dimethyl-1,4-phenyleneoxide) membrane with porous sandwich structure for anion exchange membrane fuel cell applications
High-performance layered double hydroxide/poly(2,6-dimethyl-1,4-phenyleneoxide) membrane with porous sandwich structure for anion exchange membrane fuel cell applications
复制标题
用于阴离子交换膜燃料电池应用的具有多孔夹层结构的高性能层状双氢氧化物/聚(2,6-二甲基-1,4-苯醚)膜
DOI：
10.1016/j.memsci.2018.01.045
复制
发表时间：
2018-04-15
影响因子：
9.5
通讯作者：
Zhu, Hong
中科院分区：
文献类型：
--
作者：
Chen, Nanjun;Long, Chuan;Zhu, Hong
在此，我们提出了一种多孔三明治结构阴离子交换膜（AEM），以提高AEM的综合性能。通过在TC-QAPPO膜表面喷涂季铵改性的层状双氢氧化物（QA-LDH），合成了一系列基于三阳离子侧链聚（2,6-二甲基-1,4-苯醚）（TC-QAPPO）膜的多孔三明治结构AEM。与TC-QAPPO膜相比，QA-LDH/TC-QAPPO复合膜表现出比TC-QAPPO膜更高的碱稳定性、氢氧化物电导率和尺寸稳定性。 QA-LDH层表现出令人印象深刻的离子电导率和耐碱能力，充当保护层，保护TC-QAPPO膜免受氢氧化物的攻击。多孔结构的设计是为了加速QA-LDH层中的离子电导率。低溶胀比的QA-LDH/TC-QAPPO膜在80℃下的最大氢氧化物电导率为122 mS/cm。长期稳定性测试表明，QA-LDH/TC-QAPPO膜在80℃下1M KOH中500小时具有最大的氢氧化物电导率保留率（85.4%）。此外，QA-LDH/TC-QAPPO膜在60℃、554 mA/cm(2)的电流密度下实现了267 mW/cm(2)的最大功率密度。多孔三明治结构策略为制备用于碱性燃料电池应用的高性能AEM提供了一种新的、可靠的方法。
Herein, we present a porous-sandwich-structure anion exchange membrane (AEM) to improve the comprehensive performance of the AEM. A series of porous-sandwich-structure AEMs based on triple-cation side chain poly(2,6-dimethyl-1,4-phenylene oxide) (TC-QAPPO) membrane were synthesized by spaying quaternary-ammonium-modified layered double hydroxide (QA-LDH) on the surface of the TC-QAPPO membrane. Compared with the TC-QAPPO membrane, the QA-LDH/TC-QAPPO composite membranes show higher alkaline stability, hydroxide conductivity, and dimensional stability than those of TC-QAPPO membrane. The QA-LDH layer exhibits an impressive ion conductivity and alkali resistant ability, acting as a protective layer to protect the TC-QAPPO membrane from being attacked by hydroxide. The porous structure was designed to accelerate the ion conductivity in QA-LDH layer. The QA-LDH/TC-QAPPO membranes with low swelling ratio exhibits a maximum hydroxide conductivity of 122 mS/cm at 80 degrees C. A long-term stability test demonstrates that the QA-LDH/TC-QAPPO membranes have a maximum retention (85.4%) of hydroxide conductivity in 1M KOH at 80 degrees C for 500 h. Besides, the QA-LDH/TC-QAPPO membrane achieves a maximum power density of 267 mW/cm(2) at current density of 554 mA/cm(2) at 60 degrees C. The porous-sandwich-structure strategy provides a new and reliable method to prepare high-performance AEMs for alkaline fuel cell applications.