Effect of carbon material and surfactant on ink property and resulting surface cracks of fuel-cell microporous layers  

作　　者：Zhekun Chen Weitong Pan Longfei Tang Xueli Chen Fuchen Wang 

机构地区：[1]Engineering Research Center of Resource Utilization of Carbon-containing Waste with Carbon Neutrality,Ministry of Education,East China University of Science and Technology,Shanghai 200237,China [2]Key Laboratory of Pressure Systems and Safety,Ministry of Education,East China University of Science and Technology,Shanghai 200237,China

出　　处：《Chinese Journal of Chemical Engineering》2024年第5期1-12,共12页中国化学工程学报（英文版）

基　　金：supported by China National Postdoctoral Program for Innovative Talents (BX20230121);China Postdoctoral Science Foundation (2023M741163);Shanghai Super Postdoctoral Incentive Program (2023741)。

摘　　要：Ensuring the consistency of electrode structure in proton-exchange-membrane fuel cells is highly desired yet challenging because of wide-existing and unguided cracks in the microporous layer(MPL). The first thing is to evaluate the homogeneity of MPL with cracks quantitatively. This paper proposes the homogeneity index of a full-scale MPL with an area of 50 cm~2, which is yet to be reported in the literature to our knowledge. Besides, the effects of the carbon material and surfactant on the ink and resulting MPL structure have been studied. The ink with a high network development degree produces an MPL with low crack density, but the ink with high PDI produces an MPL with low crack homogeneity. The polarity of the surfactant and the non-polarity of polytetrafluoroethylene(PTFE) are not mutually soluble,resulting in the heterogeneous PTFE distribution. The findings of this study provide guidelines for MPL fabrication.

关 键 词：Proton-exchange-membrane fuel cell Microporous layer Crack density Crack homogeneity Polytetrafluoroethylene distribution SURFACTANT 

分 类 号：TM911.4[电气工程—电力电子与电力传动] TQ423[化学工程] TQ127.11