Co-filling of ZIFs-derived porous carbon and silica in improvement of sulfonated poly(ether ether ketone) as proton exchange membranes for direct methanol fuel cells
Co-filling of ZIFs-derived porous carbon and silica in improvement of sulfonated poly(ether ether ketone) as proton exchange membranes for direct methanol fuel cells
复制标题
DOI：
10.1016/j.jpowsour.2022.231853
复制
发表时间：
2022-09
影响因子：
9.2
通讯作者：
Jinyang Li;Wenjie Wang;Zhongqing Jiang;Binglu Deng;Zhongqing Jiang
中科院分区：
文献类型：
--
作者：
Jinyang Li;Wenjie Wang;Zhongqing Jiang;Binglu Deng;Zhongqing Jiang
本工作报道了磺化咪唑骨架衍生的多孔碳（ZIF-C-SO 3 H）和磺化二氧化硅（SSiO 2）的共填充以改善磺化聚醚醚酮（SPEEK）膜的性能。根据ZIF-C-SO 3 H和SSiO 2各自的性质，获得的SSiO 2和ZIF-C-SO 3 H填充SPEEK（SSiO 2/ZIF-C-SO3H@SPEEK）膜具有最佳的ZIF-C-SO 3 H和SSiO 2的重量百分比，显示出比Nafion 115更高的质子传导率和更低的甲醇渗透率。SSiO 2/ZIF-C-SO3H@SPEEK膜的高性能主要来源于其共填充结构。具体而言，ZIF-C-SO 3 H填充物提高了质子传导性并降低了甲醇渗透性，SSiO 2填充物进一步降低了SSiO 2/ZIF-C-SO3H@SPEEK膜的甲醇渗透性。此外，ZIF-C-SO 3 H和SSiO 2与SPEEK基质的特定相互作用也赋予SSiO 2/ZIF-C-SO3H@SPEEK膜改善的机械和氧化稳定性以及对酸蚀刻的良好耐久性。当用于直接甲醇燃料电池（DMFC）时，SSiO 2/ZIF-C-SO3H@SPEEK膜可以表现出128.6 ± 4.6 mW cm−2的最大功率密度，是Nafion 115的两倍。结果表明，SSiO 2/ZIF-C-SO3H@SPEEK膜具有作为DMFC质子交换膜的巨大潜力。
This work reports on the co-filling of sulfonated zeolitic imidazolate framework-derived porous carbon (ZIF-C-SO3H) and sulfonated silica (SSiO2) to improve the performance of the sulfonated poly(ether ether ketone) (SPEEK) membrane. Dependent on the individual properties of the ZIF-C-SO3H and the SSiO2, the obtained SSiO2and ZIF-C-SO3H filled SPEEK (SSiO2/ZIF-C-SO3H@SPEEK) membrane with the optimum weight percentages of the ZIF-C-SO3H and the SSiO2shows higher proton conductivity and lower methanol permeability than Nafion 115. The high performance of the SSiO2/ZIF-C-SO3H@SPEEK membrane mainly originates from its co-filled structure. Specifically, the ZIF-C-SO3H filling improves the proton conductivity and lowers methanol permeability, and the SSiO2filling further lowers methanol permeability of the SSiO2/ZIF-C-SO3H@SPEEK membrane. Additionally, the specific interactions of the ZIF-C-SO3H and the SSiO2with the SPEEK matrix also endue the SSiO2/ZIF-C-SO3H@SPEEK membrane with improved mechanical and oxidation stabilities and good durability towards the acid etching. When used in direct methanol fuel cells (DMFCs), the SSiO2/ZIF-C-SO3H@SPEEK membrane can exhibit a maximum power density of 128.6 ± 4.6 mW cm−2, which is ∼ twice that of Nafion 115. The result strongly suggests the great potential of using the SSiO2/ZIF-C-SO3H@SPEEK membrane as a proton exchange membrane for the DMFC.