Three-Decker Strategy Based on Multifunctional Layered Double Hydroxide to Realize High-Performance Hydroxide Exchange Membranes for Fuel Cell Applications
Three-Decker Strategy Based on Multifunctional Layered Double Hydroxide to Realize High-Performance Hydroxide Exchange Membranes for Fuel Cell Applications
复制标题
基于多功能层状双氢氧化物的三层策略实现燃料电池应用的高性能氢氧化物交换膜
DOI：
10.1021/acsami.8b01145
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发表时间：
2018-05-30
影响因子：
9.5
通讯作者：
Yu, Jinghua
中科院分区：
文献类型：
--
作者：
Chen, Nanjun;Long, Chuan;Yu, Jinghua
在此，我们提出了一个三层层状双氢氧化物（LDH）/聚（苯醚）（PPO）的氢氧化物交换膜（HEM）的应用。受阻醛LDH被高度稳定的3-羟基-6-氮杂螺[5.5]十一烷（OH-ASU）阳离子官能化以提高其离子交换能力。采用静电喷雾法将ASU-LDH与三重阳离子功能化的PPO（TC-PPO）复合，制备了三层ASU-LDH/TC-PPO杂化膜。值得注意的是，具有多孔结构的ASU-LDH层显示出ASULDH/TC-PPO杂化膜的许多有价值的性质，例如改善氢氧化物电导率、尺寸稳定性和碱稳定性。ASU-LDH/TC-PPO杂化膜的最大OH-电导率在80 ℃时达到0.113 S/cm。在IM NaOH中在80 ° C下持续588小时的碱稳定性测试后，仅检测到OH-电导率下降11.5%，延长了TC-PPO膜的寿命。在电流密度为0.391 A/cm（2）时，ASU-LDH/TC-PPO杂化膜的最大功率密度为0.209 W/cm（2）。综上所述，ASU-LDH/TC-PPO杂化膜为制备高性能HEMs提供了可靠的方法。
Herein, we present a three-decker layered double hydroxide (LDH)/poly(phenylene oxide) (PPO) for hydroxide exchange membrane (HEM) applications. Hexagonal LDH is functionalized with highly stable 3-hydroxy-6-azaspiro [5.5] undecane (OH-ASU) cations to promote it's ion-exchange capacity. The ASU-LDH is combined with triple cations functionalized PPO (TC-PPO) to fabricate a three-decker ASU-LDH/TC-PPO hybrid membrane by an electrostatic-spraying method. Notably, the ASU-LDH layer with a porous structure shows many valuable properties for the ASULDH/TC-PPO hybrid membranes, such as improving hydroxide conductivity, dimensional stability, and alkaline stability. The maximum OH- conductivity of ASU-LDH/TC-PPO hybrid membranes achieves 0.113 S/cm at 80 degrees C. Only 11.5% drops in OH- conductivity was detected after an alkaline stability test in 1 M NaOH at 80 degrees C for 588 h, prolonging the lifetime of the TC-PPO membrane. Furthermore, the ASU-LDH/TC-PPO hybrid membrane realizes a maximum power density of 0.209 W/cm(2) under a current density of 0.391 A/cm(2). In summary, the ASU-LDH/TC-PPO hybrid membranes provide a reliable method for preparing high-performance HEMs.