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Large Area Deposition by Radio Frequency Sputtering of Gd(0.1)Ce(0.9)O(1.95) Buffer Layers in Solid Oxide Fuel Cells: Structural, Morphological and Electrochemical Investigation

We investigate the influence of position, under large circular sputtering targets, on the final electrochemical performance of 35 mm diameter button solid oxide fuel cells with sputter-deposited Gadolinium doped Ceria barrier layers, positioned in order to almost cover the entirety of the area assoc...

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Autores principales: Coppola, Nunzia, Polverino, Pierpaolo, Carapella, Giovanni, Ciancio, Regina, Rajak, Piu, Dario, Montinaro, Martinelli, Francesca, Maritato, Luigi, Pianese, Cesare
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8510350/
https://www.ncbi.nlm.nih.gov/pubmed/34640221
http://dx.doi.org/10.3390/ma14195826
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author Coppola, Nunzia
Polverino, Pierpaolo
Carapella, Giovanni
Ciancio, Regina
Rajak, Piu
Dario, Montinaro
Martinelli, Francesca
Maritato, Luigi
Pianese, Cesare
author_facet Coppola, Nunzia
Polverino, Pierpaolo
Carapella, Giovanni
Ciancio, Regina
Rajak, Piu
Dario, Montinaro
Martinelli, Francesca
Maritato, Luigi
Pianese, Cesare
author_sort Coppola, Nunzia
collection PubMed
description We investigate the influence of position, under large circular sputtering targets, on the final electrochemical performance of 35 mm diameter button solid oxide fuel cells with sputter-deposited Gadolinium doped Ceria barrier layers, positioned in order to almost cover the entirety of the area associated with a 120 × 80 mm(2) industrial cell. We compare the results obtained via structural and morphological analysis to the Electrochemical Impedance Spectroscopy (EIS) measurements performed on the button cells, disentangling the role of different parameters. The Atomic Force Microscopy analysis makes it possible to observe a decrease in the roughness values from the peripheral to the central zones under the sputtering target, with peak-to-valley roughness values, respectively, decreasing from 380 nm to 300 nm, while Scanning Electron Microscopy and Energy Dispersive Spectroscopy show a dependence of the layer coverage from the position. The electrochemical performances of button cells with buffer layers of only 200 nm in thickness, and with negligible thickness gradients across them, show current density values of up to 478 mA/cm(2) at 0.8 V and 650 °C, with an improvement of more than 67% with respect to button cells with standard (screen printed) buffer layers. These results point out the major influence exerted by parameters such as the thickness gradient and the coverage of the sputtered buffer layers in determining the final electrochemical performances.
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spelling pubmed-85103502021-10-13 Large Area Deposition by Radio Frequency Sputtering of Gd(0.1)Ce(0.9)O(1.95) Buffer Layers in Solid Oxide Fuel Cells: Structural, Morphological and Electrochemical Investigation Coppola, Nunzia Polverino, Pierpaolo Carapella, Giovanni Ciancio, Regina Rajak, Piu Dario, Montinaro Martinelli, Francesca Maritato, Luigi Pianese, Cesare Materials (Basel) Article We investigate the influence of position, under large circular sputtering targets, on the final electrochemical performance of 35 mm diameter button solid oxide fuel cells with sputter-deposited Gadolinium doped Ceria barrier layers, positioned in order to almost cover the entirety of the area associated with a 120 × 80 mm(2) industrial cell. We compare the results obtained via structural and morphological analysis to the Electrochemical Impedance Spectroscopy (EIS) measurements performed on the button cells, disentangling the role of different parameters. The Atomic Force Microscopy analysis makes it possible to observe a decrease in the roughness values from the peripheral to the central zones under the sputtering target, with peak-to-valley roughness values, respectively, decreasing from 380 nm to 300 nm, while Scanning Electron Microscopy and Energy Dispersive Spectroscopy show a dependence of the layer coverage from the position. The electrochemical performances of button cells with buffer layers of only 200 nm in thickness, and with negligible thickness gradients across them, show current density values of up to 478 mA/cm(2) at 0.8 V and 650 °C, with an improvement of more than 67% with respect to button cells with standard (screen printed) buffer layers. These results point out the major influence exerted by parameters such as the thickness gradient and the coverage of the sputtered buffer layers in determining the final electrochemical performances. MDPI 2021-10-05 /pmc/articles/PMC8510350/ /pubmed/34640221 http://dx.doi.org/10.3390/ma14195826 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Coppola, Nunzia
Polverino, Pierpaolo
Carapella, Giovanni
Ciancio, Regina
Rajak, Piu
Dario, Montinaro
Martinelli, Francesca
Maritato, Luigi
Pianese, Cesare
Large Area Deposition by Radio Frequency Sputtering of Gd(0.1)Ce(0.9)O(1.95) Buffer Layers in Solid Oxide Fuel Cells: Structural, Morphological and Electrochemical Investigation
title Large Area Deposition by Radio Frequency Sputtering of Gd(0.1)Ce(0.9)O(1.95) Buffer Layers in Solid Oxide Fuel Cells: Structural, Morphological and Electrochemical Investigation
title_full Large Area Deposition by Radio Frequency Sputtering of Gd(0.1)Ce(0.9)O(1.95) Buffer Layers in Solid Oxide Fuel Cells: Structural, Morphological and Electrochemical Investigation
title_fullStr Large Area Deposition by Radio Frequency Sputtering of Gd(0.1)Ce(0.9)O(1.95) Buffer Layers in Solid Oxide Fuel Cells: Structural, Morphological and Electrochemical Investigation
title_full_unstemmed Large Area Deposition by Radio Frequency Sputtering of Gd(0.1)Ce(0.9)O(1.95) Buffer Layers in Solid Oxide Fuel Cells: Structural, Morphological and Electrochemical Investigation
title_short Large Area Deposition by Radio Frequency Sputtering of Gd(0.1)Ce(0.9)O(1.95) Buffer Layers in Solid Oxide Fuel Cells: Structural, Morphological and Electrochemical Investigation
title_sort large area deposition by radio frequency sputtering of gd(0.1)ce(0.9)o(1.95) buffer layers in solid oxide fuel cells: structural, morphological and electrochemical investigation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8510350/
https://www.ncbi.nlm.nih.gov/pubmed/34640221
http://dx.doi.org/10.3390/ma14195826
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