Scandium Doping Effect on a Layered Perovskite Cathode for Low-Temperature Solid Oxide Fuel Cells (LT-SOFCs)

Layered perovskite oxides are considered as promising cathode materials for the solid oxide fuel cell (SOFC) due to their high electronic/ionic conductivity and fast oxygen kinetics at low temperature. Many researchers have focused on further improving the electrochemical performance of the layered...

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Main Authors:	Donghwi Jeong, Junyoung Kim, Ohhun Kwon, Chaehyun Lim, Sivaprakash Sengodan, Jeeyoung Shin, Guntae Kim
Format:	Article
Language:	English
Published:	MDPI AG 2018-11-01
Series:	Applied Sciences
Subjects:	perovskite electrochemistry solid oxide fuel cells cathode material
Online Access:	https://www.mdpi.com/2076-3417/8/11/2217

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spelling	doaj-122a1db8ec1a4cebae0a4c6d268207ec2020-11-24T20:49:21ZengMDPI AGApplied Sciences2076-34172018-11-01811221710.3390/app8112217app8112217Scandium Doping Effect on a Layered Perovskite Cathode for Low-Temperature Solid Oxide Fuel Cells (LT-SOFCs)Donghwi Jeong0Junyoung Kim1Ohhun Kwon2Chaehyun Lim3Sivaprakash Sengodan4Jeeyoung Shin5Guntae Kim6Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, KoreaDepartment of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, KoreaDepartment of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, KoreaDepartment of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, KoreaDepartment of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, KoreaDivision of Mechanical Systems Engineering, Sookmyung Women’s University, Seoul 04310, KoreaDepartment of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, KoreaLayered perovskite oxides are considered as promising cathode materials for the solid oxide fuel cell (SOFC) due to their high electronic/ionic conductivity and fast oxygen kinetics at low temperature. Many researchers have focused on further improving the electrochemical performance of the layered perovskite material by doping various metal ions into the B-site. Herein, we report that Sc<sup>3+</sup> doping into the layered perovskite material, PrBaCo<sub>2</sub>O<sub>5+<i>δ</i></sub> (PBCO), shows a positive effect of increasing electrochemical performances. We confirmed that Sc<sup>3+</sup> doping could provide a favorable crystalline structure of layered perovskite for oxygen ion transfer in the lattice with improved Goldschmidt tolerance factor and specific free volume. Consequently, the Sc<sup>3+</sup> doped PBCO exhibits a maximum power density of 0.73 W cm<sup>−2</sup> at 500 °C, 1.3 times higher than that of PBCO. These results indicate that Sc<sup>3+</sup> doping could effectively improve the electrochemical properties of the layered perovskite material, PBCO.https://www.mdpi.com/2076-3417/8/11/2217perovskiteelectrochemistrysolid oxide fuel cellscathode material
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Donghwi Jeong Junyoung Kim Ohhun Kwon Chaehyun Lim Sivaprakash Sengodan Jeeyoung Shin Guntae Kim
spellingShingle	Donghwi Jeong Junyoung Kim Ohhun Kwon Chaehyun Lim Sivaprakash Sengodan Jeeyoung Shin Guntae Kim Scandium Doping Effect on a Layered Perovskite Cathode for Low-Temperature Solid Oxide Fuel Cells (LT-SOFCs) Applied Sciences perovskite electrochemistry solid oxide fuel cells cathode material
author_facet	Donghwi Jeong Junyoung Kim Ohhun Kwon Chaehyun Lim Sivaprakash Sengodan Jeeyoung Shin Guntae Kim
author_sort	Donghwi Jeong
title	Scandium Doping Effect on a Layered Perovskite Cathode for Low-Temperature Solid Oxide Fuel Cells (LT-SOFCs)
title_short	Scandium Doping Effect on a Layered Perovskite Cathode for Low-Temperature Solid Oxide Fuel Cells (LT-SOFCs)
title_full	Scandium Doping Effect on a Layered Perovskite Cathode for Low-Temperature Solid Oxide Fuel Cells (LT-SOFCs)
title_fullStr	Scandium Doping Effect on a Layered Perovskite Cathode for Low-Temperature Solid Oxide Fuel Cells (LT-SOFCs)
title_full_unstemmed	Scandium Doping Effect on a Layered Perovskite Cathode for Low-Temperature Solid Oxide Fuel Cells (LT-SOFCs)
title_sort	scandium doping effect on a layered perovskite cathode for low-temperature solid oxide fuel cells (lt-sofcs)
publisher	MDPI AG
series	Applied Sciences
issn	2076-3417
publishDate	2018-11-01
description	Layered perovskite oxides are considered as promising cathode materials for the solid oxide fuel cell (SOFC) due to their high electronic/ionic conductivity and fast oxygen kinetics at low temperature. Many researchers have focused on further improving the electrochemical performance of the layered perovskite material by doping various metal ions into the B-site. Herein, we report that Sc<sup>3+</sup> doping into the layered perovskite material, PrBaCo<sub>2</sub>O<sub>5+<i>δ</i></sub> (PBCO), shows a positive effect of increasing electrochemical performances. We confirmed that Sc<sup>3+</sup> doping could provide a favorable crystalline structure of layered perovskite for oxygen ion transfer in the lattice with improved Goldschmidt tolerance factor and specific free volume. Consequently, the Sc<sup>3+</sup> doped PBCO exhibits a maximum power density of 0.73 W cm<sup>−2</sup> at 500 °C, 1.3 times higher than that of PBCO. These results indicate that Sc<sup>3+</sup> doping could effectively improve the electrochemical properties of the layered perovskite material, PBCO.
topic	perovskite electrochemistry solid oxide fuel cells cathode material
url	https://www.mdpi.com/2076-3417/8/11/2217
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Scandium Doping Effect on a Layered Perovskite Cathode for Low-Temperature Solid Oxide Fuel Cells (LT-SOFCs)

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