电化学沉积法和喷涂法制备PEMWE膜电极的工艺对比  

Comparison of preparation of PEMWE membrane electrodes assembly by electrochemical deposition and spraying

作　　者：陈葛锋 王丽华[2] 王旭梅 韩旭彤[1] CHEN Gefeng;WANG Lihua;WANG Xumei;HAN Xutong(School of Material Science and Engineering,Tiangong University,Tianjin 300387,China;Key Laboratory of Polymer in Extreme Environment,Institute of Chemistry,Chinese Academy of Science,Beijing 100190,China;Shandong Zhaojin Motian Incorporated Company,Zhaoyuan 265400,China)

机构地区：[1]天津工业大学材料科学与工程学院,天津300387 [2]中国科学院化学研究所,极端环境高分子院重点实验室,北京100190 [3]山东招金膜天股份有限公司,招远265400

出　　处：《膜科学与技术》2023年第2期35-40,48,共7页Membrane Science and Technology

摘　　要：为了制备不同结构和性能的质子交换膜电解水(PEMWE)膜电极(MEA),利用电化学沉积法和喷涂法两种工艺分别制备PEMWE膜电极.分析两种工艺制备的膜电极形貌结构和电化学性能的差异.结果表明,电化学沉积法制备的膜电极铂催化剂呈均匀片状结构,而喷涂法的Pt催化剂呈圆形颗粒状,两者都能均匀分布于催化层上.测试极化曲线发现不同工艺膜电极性能也各有差异,0.5 A/cm^(2)电流密度下槽电压相差200 mV,最大差异可达340 mV.最后对喷涂工艺的油墨进行改进,膜电极性能随着离聚物含量减小稳步提升.In order to prepare proton exchange membrane electrolytic water(PEMWE)membrane electrodes assembly(MEA)with different structures and properties,two kinds of membrane electrode assemblys were prepared by electrochemical deposition and spraying.PEMWE membrane electrode assemblys were prepared by electrochemical deposition and spraying respectively.The morphology and electrochemical properties of the membrane electrode assemblys prepared by the two processes were analyzed.The results show that the Pt catalyst prepared by electrochemical deposition have a uniform sheet structure,while the Pt catalyst prepared by spraying have a circular granular shape and is uniformly distributed on the catalytic layer.The polarization curves are tested and it is found that the electrode performance of different processes is also different.Under the current density of 0.5 A/cm^(2),the voltage difference is 200 mV,and the maximum difference is 340 mV.Finally,the ink of spraying process is improved,and the membrane electrode assembly performance is steadily improved with the decrease of ionomer content.

关 键 词：电化学沉积 喷涂 膜电极 离聚物 质子交换膜 

分 类 号：TB383[一般工业技术—材料科学与工程]