Patterning Catalyst Layers with Microscale Features by Soft Lithography Techniques for Proton Exchange Membrane Fuel Cells,ACS Applied Energy Materials

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Patterning Catalyst Layers with Microscale Features by Soft Lithography Techniques for Proton Exchange Membrane Fuel Cells
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-01-02 00:00:00 , DOI: 10.1021/acsaem.9b01754
Michael T. Y. Paul ₁ , Dongho Kim ₁ , Madhu S. Saha ₂ , Juergen Stumper ₂ , Byron D. Gates ₁

Affiliation

Microtransfer molding (μTM) and microcontact printing (μCP) techniques were demonstrated for the preparation of platinum-based catalysts in hexagonally arranged patterns to achieve cathode catalyst layers (CCLs) with microscale patterned features. These soft lithographic techniques, previously demonstrated for use in the preparation of patterned thin films, were adopted to produce patterned CCLs for proton exchange membrane fuel cells (or PEMFCs) with features having a thickness up to 20 μm. The resulting CCLs contained precise microscopic patterns that could be tuned for improving the performance of PEMFCs. It was demonstrated that CCLs containing arrays of microscale, cylindrical holes as prepared by μTM exhibited an improvement in their water management characteristics within PEMFCs when compared to CCLs prepared from continuous catalyst films. Upon further tuning of the CCL transfer procedures for μCP of CCLs, the formation of isolated microscale, disc-like features was demonstrated to have twice the mass activity of that observed for PEMFCs containing CCLs with uniform thin catalyst films. These methods to prepare patterned CCLs are compatible with current manufacturing techniques and could be easily adapted to incorporate other catalyst materials for further improvements in PEMFC performance. The soft lithography techniques used herein could also be scaled up to meet the industrial demand of large volume manufacturing.

中文翻译：

通过软光刻技术对质子交换膜燃料电池微尺度特征的催化剂层进行构图

演示了用微传递模塑（μTM）和微接触印刷（μCP）技术以六边形排列的图案制备铂基催化剂，以实现具有微型图案特征的阴极催化剂层（CCL）。先前已证明可用于制备图案化薄膜的这些软光刻技术可用于生产厚度最大为20μm的质子交换膜燃料电池（或PEMFC）的图案化CCL。最终的CCL包含精确的微观图案，可以对其进行调整以改善PEMFC的性能。已证明，与由连续催化剂薄膜制备的CCL相比，由μTM制备的包含微米级圆柱形孔阵列的CCL在PEMFC中显示出其水管理特性的改善。在进一步调整CCL的μCP的CCL转移程序后，分离出的微米级，盘状特征的形成被证明具有两倍于含有均质催化剂薄膜的CCL的PEMFC所观察到的质量活性的两倍。这些制备图案化的CCL的方法与当前的制造技术兼容，并且可以轻松地纳入其他催化剂材料，以进一步提高PEMFC的性能。在此使用的软光刻技术也可以按比例放大以满足大规模制造的工业需求。这些制备图案化的CCL的方法与当前的制造技术兼容，并且可以轻松地纳入其他催化剂材料，以进一步提高PEMFC的性能。在此使用的软光刻技术也可以按比例放大以满足大规模制造的工业需求。这些制备图案化的CCL的方法与当前的制造技术兼容，并且可以容易地适于掺入其他催化剂材料以进一步改善PEMFC性能。在此使用的软光刻技术也可以按比例放大以满足大规模制造的工业需求。

更新日期：2020-01-02

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