金属有机框架材料在质子交换膜燃料电池中的潜在应用

Potential Applications of Metal Organic Framework-Based Materials for Proton Exchange Membrane Fuel Cells

金属有机框架亦称作多孔配位网状结构,是一种多孔晶态材料,具有结构可设计、孔壁可功能化修饰、高度晶态化、比表面积大及优良的导电性等诸多优点,使其在能源转换及储存方面备受关注。本文详细介绍了新型金属有机框架质子导体及电催化剂在燃料电池方面的相关研究;综述了国内外近年来在金属有机框架质子交换膜和氧还原电催化领域所取得的一些重要进展,例如金属有机框架质子交换膜电导率可高达1.82 S·cm^(-1)(70℃, 90%RH),金属有机框架电催化剂作为阴极在膜电极测试中可产生0.91 W·cm^(-2)(0.6 V)的峰值功率密度;并指出了金属有机框架在质子交换膜和电催化剂研究中存在的问题,这为今后开发高电导性质子交换膜和高催化活性电催化提供了新思路。

Metal-organic frameworks (MOFs),also called porous coordination networks (PCNs),are new types of porous crystalline materials,which have quite a few advantages,such as the structural design,functional modification of pore walls,high crystallinity,large specific surface area and excellent conductivity.It has attracted great attention in energy conversion and storage.This paper describes in detail the research of the new MOFs-based proton conductors and the electrocatalyst in the field of fuel-cell,and also concludes some important progress in MOFs-based proton exchange membrane and oxygen-reduction electrocatalyst.For example,the conductivity of one kind of MOFs proton exchange membrane can be as high as 1.82S.cm^-1(70℃,90% RH).A membrane electrode assembly (MEA)using the electrocatalyst with MOFs at the cathode can produce a peak power density of 0.91W.cm^-2.This paper also points out the deficiencies in this field,which provides new approaches for the development of high conductive proton exchange membrane and high catalytic activity electrocatalys in the future.