(Invited, Digital Presentation) Tuning Gas-Diffusion-Layer Surface Wettability for Polymer Electrolyte Fuel Cells
(Invited, Digital Presentation) Tuning Gas-Diffusion-Layer Surface Wettability for Polymer Electrolyte Fuel Cells
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（特邀，数字演示）调整聚合物电解质燃料电池的气体扩散层表面润湿性
DOI：
10.1149/ma2022-01381709mtgabs
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Das P
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文献类型：
--
作者：
Das P
在目前全球倡议到本世纪中叶实现全球净零排放并保持 1.5 度的目标的情况下，聚合物电解质燃料电池 (PEFC) 被认为在能源转型中发挥着重要作用，特别是在公交车、卡车、铁路运输、船舶和渡轮以及住宅供暖部门的脱碳方面。然而，PEFC 在经济上与内燃机动力系统不具有竞争力[1]。此外，其在各种条件下的耐久性标准尚未建立，水管理仍然是性能下降和耐久性的关键问题[1-3]。因此，我的研究团队的任务是进行原创研究，使 PEFC 在经济上可行并优化其性能和耐用性 [4, 5]。在本次演讲中，我将重点介绍我们对 PEFC 气体扩散层 (GDL) 的研究，因为它与流道和微孔层的界面在水管理中发挥着重要作用。这项研究的目的是选择性地修饰具有疏水图案的 GDL 表面，以改善流道中的水传输和除水；从而提高 PEFC 的耐用性和性能。 Sigracet® GDL 用作基础基材，并使用两种不同的单体：添加气相二氧化硅 (Si) 的聚二甲基硅氧烷 (PDMS) 和氟化乙烯丙烯 (FEP) 在 GDL 表面上打印选择性图案 [6]。利用增材制造和喷涂技术在 GDL 表面上创建疏水图案。这项研究的结果展示了一种新颖但简单的方法来调整 GDL 表面，使其具有选择性润湿特性和超疏水界面，从而增强水的传输。我将讨论其中一些结果，并强调这些结果将如何有利于下一代高功率 PEFC 的水管理。
In the present scenario of a global initiative toward securing global net-zero by mid-century and keeping 1.5 degrees within reach, polymer-electrolyte fuel cells (PEFCs) are considered to play an important role in the energy transition, particularly for the decarbonization of transit buses, trucks, rail transport, ships and ferries, and the residential heating sector. However, PEFCs are not economically competitive with the internal combustion engine powertrains [1]. Moreover, their durability standards in widely varying conditions have yet to be established and water management remains a critical issue for performance degradation and durability [1-3]. Thus, the mission of my research team is to conduct original research to make PEFCs economically viable and optimize their performance and durability [4, 5].In this talk, I will highlight our research on PEFC’s gas diffusion layer (GDL), as its interfaces with the flow channel and microporous layer play a significant role in water management. This research was aimed at selectively modifying GDL surfaces with a hydrophobic pattern to improve water transport and water removal from flow channels; thus, improving the durability and performance of PEFCs. Sigracet® GDLs were used as a base substrate and two different monomers, polydimethylsiloxane (PDMS) added with fumed silica (Si) and fluorinated ethylene propylene (FEP) were used to print a selective pattern on the GDL surfaces [6]. Both the additive manufacturing and spray coating techniques were utilized for creating the hydrophobic pattern on the GDL surfaces. The results of this study demonstrated a novel but simple approach to tune GDL surfaces with selective wetting properties and superhydrophobic interfaces that would enhance water transport. I will discuss some of these results and highlight how these results will benefit the water management of nextgeneration high-power PEFCs.