3D patterned electrodes for ultra-low platinum fuel cells
3D patterned electrodes for ultra-low platinum fuel cells
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用于超低铂燃料电池的 3D 图案电极
DOI：
10.1016/j.ijhydene.2021.12.242
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发表时间：
2022
影响因子：
7.2
通讯作者：
Elabd, Yossef A.
中科院分区：
文献类型：
--
作者：
Yang, Yifei;Sun, Rui;Elabd, Yossef A.
在这项研究中，开发了一种新的制造技术——模板辅助静电纺丝/电喷涂（E/E），并成功地生产出了具有不同图案尺寸（即图案直径为40、80、160和360 μm）的明确的三维六边形图案阵列的纳米纤维-纳米颗粒电极。在类似的超低铂负载（ca.0.06 mgPtcm−2）下，直径80 μm的六边形图案电极与随机电极类似物（无图案）相比，燃料电池功率密度提高14%，电化学表面积提高68%。在不同的图案尺寸中，直径为80 μm的六边形图案电极的燃料电池铂利用率最高，电极电阻最低。此外，与随机定向电极相比，直径较小的图案电极获得了更好的机械刚度。与传统的电极技术和基于油墨的图案技术相比，模板辅助E/E技术为研究超低铂负载下图案类型和尺寸对燃料电池铂利用率的影响提供了一个通用的平台。
In this study, a new fabrication technique, template-assisted electrospinning/electrospraying (E/E), was developed and successfully produced organized-structured nanofiber-nanoparticle electrodes with well-defined 3D hexagonal patterned arrays of various pattern sizes (i.e., pattern diameters of 40, 80, 160, and 360 μm). At similar ultra-low platinum loadings (ca.0.06 mgPtcm−2), the 80 μm diameter hexagonal patterned electrodes exhibited 14% higher fuel cell power densities and 68% higher electrochemical surface area compared to the random electrode analogs (without patterns). Among different pattern sizes, electrodes with an 80 μm diameter hexagonal pattern resulted in the highest fuel cell platinum utilization and lowest electrode resistance. Additionally, patterned electrodes with smaller diameters achieved improved mechanical stiffness compared to random oriented electrodes. Compared to electrodes producedviaconventional techniques and ink-based patterning techniques, the template-assisted E/E technique provides a versatile platform for investigating the effect of pattern type and size on fuel cell platinum utilization under ultra-low platinum loadings.