Electrodes based on nafion and epoxy-graphene composites for improving the performance and durability of open cathode fuel cells, prepared by electrospray deposition
| Autor: | M.A. Gómez, A.J. Navarro, J.J. Giner-Casares, M. Cano, A.J. Fernández-Romero, J.J. López-Cascales |
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| Přispěvatelé: | Universidad Politécnica de Cartagena |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | International Journal of Hydrogen Energy 47, 13980-13989 (2022) Helvia. Repositorio Institucional de la Universidad de Córdoba instname |
| Popis: | Fabrication of electrodes for polymer electrolyte fuel cells is a intriguing process in which a balance between gas transport, electrical conductivity, proton transport and water managing must be optimized. In this work four different electrodes prepared by electrospray deposition have been studied using different catalytic inks, in which Nafion and epoxy doped with Graphene-Nanoplatelets were used as binders. After studying the behavior of those electrodes in a single open cathode fuel cell proton electrolyte membrane, it is clear that the addition of epoxy as binder doped with graphene, improves the performance of the fuel cell and increase the mechanical stability of the electrode avoiding the loose of catalyst during the electrode manipulation in the fuel cell assembly process and the durability of the fuel cell. To explain this behavior, an ex-situ study was carried out, in which properties such as its surface morphology, hydrophobicity and electrical and thermal conductivity of those electrodes were studied. From the results of this study, such improvement in the performance of the fuel cell was justified on the basis of the increase in the electrical conductivity, a diminution in its thermal conductivity and an enhancement of hydrophobicity (surface morphology) of the deposited catalyst layer, when an optimum quantity of epoxy is added to the catalytic ink that makes to improve the mechanical properties of those electrodes AJN and MAG are actually working on this project with a contract funded by the Comunidad Atonoma de la Región de Murcia, Conserjería de Desarrollo Económico, Turismo y Empleo, and the European Union, through the program RIS3- MUR, grant number 2I20SAE00079. This work has also been funded by the Spanish Ministry of Science and Innovation (AEI, Spain,PID2020-112744GB-I00/AEI/10.13039/501100011033 and RTI2018-095844-B-I00), Fundacion Seneca (Región de Murcia, Spain), grant number: 20985/PI/18 and Agencia estatal española de Investigación, grant number PID2019-104272RBC55/AEI/10.13039/501100011033. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. |
| Databáze: | OpenAIRE |
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