基于不同商业化炭黑的PEMFC微孔层的耐腐蚀性能  

Corrosion resistance of PEMFC microporous layers based on different commercial carbon blacks

作　　者：刘金鑫 张立昌 谭金婷 LIU Jinxin;ZHANG Lichang;TAN Jinting(State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan Hubei 430070,China;Hubei Key Laboratory of Fuel Cells,Wuhan University of Technology,Wuhan Hubei 430070,China)

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室,湖北武汉430070 [2]武汉理工大学燃料电池湖北省重点实验室,湖北武汉430070

出　　处：《电源技术》2024年第8期1653-1661,共9页Chinese Journal of Power Sources

基　　金：国家自然科学基金(22109122)。

摘　　要：反极产生的高电位会对微孔层造成不可逆的碳腐蚀损伤,严重缩短了PEMFC的寿命,因此研究由反极引发的微孔层中的碳腐蚀问题对强化PEMFC耐久性具有重要的科学意义。选择4种不同石墨化程度的商业化炭黑制成微孔层,分析其高电位腐蚀前后的性能。结果表明提高炭黑的石墨化程度、降低其比表面积,腐蚀后GDL表面亲疏水性、表面形貌、孔结构等物理性质的退化程度有所缓解,单电池性能的衰退程度也减轻。四种炭黑的抗腐蚀强度为乙炔黑>XC-72>科琴黑>BP2000,由乙炔黑制备的GDL经过电化学腐蚀后各项物理性质几乎没有退化,单电池性能衰退程度较低。这为开发具有优异抗反极能力的阳极微孔层,提高PEMFC耐久性提供重要的理论依据。The high potential generated by the cell reversal causes irreversible carbon corrosion damage to the microporous layer,which greatly shortens the durability of PEMFC.So the study of carbon corrosion in the microporous layer caused by the cell reversal has important scientific significance to strengthen the durability of PEMFC.In this study,four kinds of commercial carbon black with different degrees of graphitization were selected to prepare microporous layer,and their properties before and after high-potential corrosion were analyzed.The results show that increasing the graphitization degree of carbon black and decreasing its specific surface area,the degradation degree of physical properties such as surface hydrophilicity,surface morphology and pore structure of GDL after corrosion was alleviated,and the degradation degree of cell performance was also alleviated.The corrosion resistance of the four kinds of carbon black is acetylene black>XC-72>Ketjen Black>BP2000.The physical properties of GDL prepared by acetylene black has almost no degradation after corrosion,and the performance of cell has a lower degradation degree.This provides an important theoretical basis for developing excellent reversal tolerant anode microporous layer and improving the durability of PEMFC.

关 键 词：质子交换膜燃料电池 微孔层 反极 商业化炭黑 碳腐蚀 

分 类 号：TM911.4[电气工程—电力电子与电力传动]