摘要
多孔金属是一种兼具结构与功能的材料,得益于其低密度、高孔隙率、可控渗透性的优点,在许多领域都有广泛应用。本文综述了多孔金属在质子交换膜燃料电池(proton exchange membrane fuel cell,PEMFC)双极板流场中的研究进展,相较于传统流道流场,高开孔率(>70%)的多孔金属具有相互连通的三维立体结构,可以增加气体分布均匀性、并加强气体传质、增强电子和热的传导及水的排出,从而对电池性能有较大提升。同时探讨多孔金属参数、流场结构设计、服役参数目和多孔材料本身对多孔金属流场在PEMFC应用中的影响。目前阻碍多孔金属在PEMFC应用的最大问题是腐蚀,且多孔金属内部结构复杂对涂层制备工艺提出更大挑战,因此如何有效解决多孔金属在PEMFC两极环境中的腐蚀问题,对推进多孔金属在燃料电池领域中的应用意义重大。
Porous metal is a material that combines both structural and functional properties.It is widely used in various fields due to its low density,high porosity and controlled permeability.In this paper,the application progress of porous metal on the flow field of bipolar plates in proton exchange membrane fuel cell(PEMFC)was reviewed.Compared with the traditional flow channel,the high open porosity(>70%)porous metal has three-dimensional structure connected with each other,which can increase the uniformity of gas distribution,enhance gas mass transfer,enhance electron/heat conduction and water discharge,so eventually improve battery performance.In addition,the effects of porous metal parameters,flow field structure design,service parameters and materials on porous metal flow field in PEMFC applications were explored.At present,the biggest problem that hinders the application of porous metal in PEMFC is corrosion,and more challenges must be faced on the coating preparation process for the complex internal structure of porous metal.Therefore,how to effectively solve the corrosion problem of porous metal in PEMFC environment,which have great significance to promote the application of porous metal in fuel cell field.
作者
李伟
李争显
刘林涛
耿娟娟
相远帆
王凯凯
LI Wei;LI Zheng-xian;LIU Lin-tao;GENG Juan-juan;XIANG Yuan-fan;WANG Kai-kai(School of Metallurgy,Xi’an University of Architecture and Technology,Xi’an 710055,China;Northwest Institute of Nonferrous Metals Research,Xi’an 710016,China;School of Materials Science and Engineering,Northeastern University,Shenyang 110004,China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2020年第5期31-40,共10页
Journal of Materials Engineering
基金
陕西省创新人才计划项目(2017CKT-06)
科技部国际合作项目(2014DFR50450)。
关键词
多孔金属流场
双极板
氢燃料电池
耐蚀性
porous metal flow filed
bipolar plate
hydrogen fuel cell
corrosion resistance
