PEM水电解池低成本阳极钛纤维毡扩散层研究  

A low-cost Ti felt anode gas diffusion layer for PEM water electrolysis

作　　者：范芷萱 俞红梅[1] 姜广 迟军[1] 孙树成[1] FAN Zhi-xuan;YU Hong-mei;JIANG Guang;CHI Jun;SUN Shu-cheng(Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian Liaoning 116023,China;University of Chinese Academy of Sciences,Beijing 100039,China)

机构地区：[1]中国科学院大连化学物理研究所,辽宁大连116023 [2]中国科学院大学,北京100039

出　　处：《电源技术》2020年第7期933-936,共4页Chinese Journal of Power Sources

基　　金：国家重点研发计划(2018YFB1503103);中国科学院战略性先导科技专项(XDA21090100);国网安徽省电科院科技项目(SGTYHT/18-JS-206)。

摘　　要：采用浓盐酸刻蚀焙烧还原法将贵金属混合氧化物涂层制备在钛纤维毡表面,将此修饰后的钛纤维毡用做质子交换膜(PEM)水电解池的阳极扩散层。通过扫描电镜观察可知钛纤维毡纤维表面被微米级的沟槽与孔洞覆盖,且有贵金属氧化物晶粒生长。电化学表征表明该阳极扩散层具有良好的电解析氧反应(OER)催化活性,阳极贵金属用量仅2 mg/cm^2时,组装PEM电解池的性能达到1.841 V@2 000 mA/cm^2。对钛纤维毡的厚度及膜电极组件制备方法进行了优化。优化后的阳极扩散层具有良好的导电性、化学与机械稳定性及抗腐蚀性能,用于PEM电解池中可降低贵金属用量,实现低成本电解制氢。Mixed precious metal oxide coating was prepared on Ti felt by HCI etching and thermal decomposition,and used for anode gas diffusion layer(GDL) in proton exchange membrane(PEM) water electrolysis in this work.The surface of fiber was covered with micrometer scale tiny cracks and holes,and precious metal oxide grains grew on fibers.The electrochemical characterizations showed the Ti felt anode GDL feature in great OER catalytic activity.The usage of precious metal was only 2 mg/cm^2 in the anode,and the single cell performance of 1.841 V@2 000 mA/cm^2 has been achieved with this Ti felt anode GDL,which was better than contrast sample sintered porous Ti plate anode GDL.This work also explored the optimized thickness of Ti felt and the prepared method of membrane electrode assembly(MEA).The Ti felt anode GDL is featured with great conductivity,mechanical strength,chemical stability and anti-corrosion ability.The Ti felt anode GDL could decrease usage of precious metal and achieve low-cost hydrogen production.

关 键 词：质子交换膜水电解 阳极扩散层 贵金属氧化物涂层 钛纤维毡 

分 类 号：TM911[电气工程—电力电子与电力传动]