Study On Fabricaiton Of Nafion Nanowire Arrays Within Template

Nowadays, environmental issue especially the air pollution has been paidmore and more attention to, and it has an increasing influence on communityand economic development. On account of its environment-friendlycharacteristic, hydrogen energy was recognized as which will replace the fossilenergy to support the global economy in the future. The market system ofhydrogen economy was consisted of the production, transportation, storage anduse of hydrogen energy. As being the last outfits in hydrogen energy industrialchain, also as the key element, fuel cell has been in the late age of technicalvalidation process and been in the early stage of commercial development.Proton exchange membrane fuel cell (PEMFC), as a kind of fuel cell, is calledthe best choice of the future automotive power because of no-pollution highenergy conversion efficiency. Major automotive groups Toyota, Nissan, Honda,Hyundai Car companies have launched their own fuel cell vehicles-FCVs, andconfirmed plans to produce hydrogen fuel cell vehicles for sale in1-5years.2015is expected to be the first commercialization year for fuel cell vehicles by most counterparts.High costs of PEMFC can’t meet the needs of FCVs popularization, mainlybecause catalyst of PEMFC is relied on the Pt catalyst. The total reserves of Ptare too little to satisfy the levels of car ownership in the world. And so thecatalyst layer must get rid of depending on Pt, or achieve a low Pt usage, thus anovel ordered MEA is developed based on nanowire/nanorod. And to overcomethe obove problems, the third generation MEA has been proposed, realized,widely studied and even commercialized among colleges and researchorganizations in the world.In catalyst layer of MEA, the electrochemical reaction is happened andreactional gas, proton, electron and water is transmitted. Consequently, theordered MEA means especially the ordering of catalyst layer of MEA. Thisarticle’s starting point is improving multiphase transmission channel. Theordered MEA CLs can be broadly divided into three types:(1) ordered catalystsupport structure;(2) ordered catalyst structure;(3) ordered ionomer structure.We break the ordered MEA up into three kinds MEA: MEA based on orderedcatalyst support, MEA based on ordered catalyst, MEA based on ordered protontransportation materials.Direction of this research is to explore controllable preparation technologyof MEA based on ordered proton transportation materials-MEA based onordered Nafion nanowire arrays. We observed the morphology of Nafionnanowire arrays, analyzed composition and physicochemical performance of MEA based on ordered Nafion nanowire arrays, and explained its growthmechanism.The results would be obtained as follows:(1) hot-pressing method andtemplate method are used in shape-controlled synthesis of Nafion nanowirearrays MEA higher than glass transition temperature;(2) this process bring maincomponents and group of Nafion nanowires into correspondence with maincomponents and group of commercialized Nafion211membrane;(3) orderedNafion nanowire arrays membrane shows good self-humidifying properties afterdehydration rate test.In outlooks part, we plan main lines about MEA based on ordered Nafionnanowire arrays.