An Epoxy-Free Sample Preparation Approach to Enable Imaging of Ionomer and Carbon in Polymer Electrolyte Membrane Fuel Cells

Amir Peyman Soleymani; Marcia Reid; Jasna Jankovic

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An Epoxy-Free Sample Preparation Approach to Enable Imaging of Ionomer and Carbon in Polymer Electrolyte Membrane Fuel Cells

机译：An Epoxy-Free Sample Preparation Approach to Enable Imaging of Ionomer and Carbon in Polymer Electrolyte Membrane Fuel Cells

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Performance and durability of electrodes in proton exchange membrane fuelcells (PEMFCs), as one of the most promising zero-emission power generationtechnologies, depend on the composition, microstructure, and distributionof its components-metal catalyst, carbon support, and ionomer.Their improvement requires an in-depth understanding of the electrodes'structure-property-performance relationship, for which transmission electronmicroscopy (TEM) has been an invaluable tool. However, the conventionalTEM sample preparation, namely epoxy-embedding ultramicrotomy, posesimpediments in imaging ionomer and distinguishing it from carbon. Therefore,in this research, an epoxy-free ultramicrotome technique is implementedon beginning-of-life (BOL) and end-of-life (EOL) PEMFC samples. For the firsttime, TEM and electron tomography-TEM images reveals fascinating detailsof the ionomer network, carbon particles’ structure, and Pt distribution inBOL, as well as their structural changes after the cell degradation. Finally, thestructural descriptors, extracted by a proprietary quantification method, arecorrelated with visual observations.

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《Advanced functional materials》 |2023年第6期|2209733.1-2209733.11|共11页
作者
Amir Peyman Soleymani; Marcia Reid; Jasna Jankovic;
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作者单位

Center for Clean Energy Engineering Institute of Materials Science, and Department of Materials Science and Engineering University of Connecticut 44 Weaver Rd. Unit 5233, Storrs, Connecticut 06269, USA;

Canadian Center for Electron Microscopy McMaster University 1280 Main Street West, Hamilton, ON L8S 4M1, Canada;

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正文语种英语
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arbon corrosion; ionomers; proton exchange membrane fuel cells; transmission electron microscopy; ultramicrotomy;

An Epoxy-Free Sample Preparation Approach to Enable Imaging of Ionomer and Carbon in Polymer Electrolyte Membrane Fuel Cells

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