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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Unexpected Performance of Inkjet-Printed Membrane Electrode Assemblies for Proton Exchange Membrane Fuel Cells

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Author(s):
Gomes Bezerra, Carlos Andre [1] ; Deiner, L. Jay [2] ; Tremiliosi-Filho, Germano [1]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Inst Quim Sao Carlos, Av Trab Sao Carlense, 400 Parque Arnold Schimidt, BR-13566590 Sao Carlos, SP - Brazil
[2] CUNY, Dept Chem, NYC Coll Technol, 300 Jay St, Brooklyn, NY 11201 - USA
Total Affiliations: 2
Document type: Journal article
Source: ADVANCED ENGINEERING MATERIALS; v. 21, n. 11 NOV 2019.
Web of Science Citations: 0
Abstract

The effect of the deposition substrate on the performance of inkjet-printed membrane electrode assemblies (MEAs) is investigated. MEAs are fabricated from inkjet-printed catalyst-coated membranes (CCMs), gas diffusion electrodes (GDEs), and a bilateral sandwich of a CCM and a GDE. All MEAs are tested in proton exchange membrane fuel cells (PEMFCs). When a hot-pressing step is included in the MEA construction, the power density achieved with the GDE-based MEA is 1.067 W cm(-2), exceeding that achieved with the CCM-based MEA (0.579 W cm(-2)), and the bilateral sandwich MEA (0.792 W cm(-2)). The origin of the superior performance of the inkjet-printed GDE-based MEAs is investigated through electrochemical impedance spectroscopy and analysis of the microstructure of the printed membranes and electrodes. Atomic force microscopy and energy dispersive X-ray spectroscopy suggest that the greater surface and interfacial areas of the GDE-printed catalyst layer may drive the unexpectedly high performance of the GDE-based MEA as compared with its CCM and bilateral sandwich counterparts. These results provide new insights into the connections between the substrate, inkjet-printed catalyst layer microstructure, and catalyst utilization. (AU)

FAPESP's process: 13/16930-7 - Electrocatalysis V: electrocatalytic processes of chemical and electrical energy interconversion
Grantee:Edson Antonio Ticianelli
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 18/08802-2 - Hierarchical structuring of Pd/TiO2 alcohol electrooxidation catalysts through reactive inkjet printing
Grantee:Germano Tremiliosi Filho
Support Opportunities: Research Grants - Visiting Researcher Grant - International