Confined PFSA/MOF composite membranes in fuel cells for promoted water management and performance
Confined PFSA/MOF composite membranes in fuel cells for promoted water management and performance
复制标题
DOI：
10.1016/j.cattod.2018.05.016
复制
发表时间：
2019-07-01
期刊：
影响因子：
5.3
通讯作者：
Yeung, King Lun
中科院分区：
文献类型：
--
作者：
Deng, Ran;Han, Wei;Yeung, King Lun
为了提高PEMFC运行过程中膜内水的管理能力，开发了一种新型的受限PFSA/MOF复合膜。两种典型的水稳定性MOF（即，ZIF-8和MIL-101）在聚多巴胺（PDA）或聚多巴胺/聚乙烯亚胺（PDA/PEI）改性的多孔不锈钢网表面上生长，并且将亚纳升的PFSA限制在所制备的基底的孔内。复合膜可以在高温下操作而无需外部加湿。在60 ℃时，采用PFSA/ZIF-8和PFSA/MIL-101复合膜的PEMFC比采用商品化Nafion 117膜的PEMFC功率密度高3倍。这种性能的提高得益于MOF良好的保水能力和热稳定性，促进了高温干燥条件下的质子转移和水分管理。
A novel kind of confined PFSA/MOF composite membranes was developed to promote the water management within the membrane during the PEMFC operation. Two typical water-stable MOFs (i.e., ZIF-8 and MIL-101) were grown on the surface of polydopamine (PDA) or polydopamine/polyethyleneimine (PDA/PEI) modified perforated stainless steel meshes, and subnanoliter of PFSA was confined within the pores of as-prepared substrate. The composite membranes can be operated at high temperatures without external humidification. The PEMFC with confined PFSA/ZIF-8 composite membrane and confined PFSA/MIL-101 composite membrane exhibit three times higher power density than the one with commercial Nafion 117 membrane at 60 degrees C. The improved performance benefited from the good water retention capacity and thermal stability of MOF facilitating proton transfer and water management under high temperature and dry conditions.