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Remarkable Ionic Conductivity in a LZO-SDC Composite for Low-Temperature Solid Oxide Fuel Cells

Recently, appreciable ionic conduction has been frequently observed in multifunctional semiconductors, pointing out an unconventional way to develop electrolytes for solid oxide fuel cells (SOFCs). Among them, ZnO and Li-doped ZnO (LZO) have shown great potential. In this study, to further improve t...

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Autores principales: Tu, Zhengwen, Tian, Yuanyuan, Liu, Mingyang, Jin, Bin, Akbar, Muhammad, Mushtaq, Naveed, Wang, Xunying, Dong, Wenjing, Wang, Baoyuan, Xia, Chen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8466903/
https://www.ncbi.nlm.nih.gov/pubmed/34578593
http://dx.doi.org/10.3390/nano11092277
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author Tu, Zhengwen
Tian, Yuanyuan
Liu, Mingyang
Jin, Bin
Akbar, Muhammad
Mushtaq, Naveed
Wang, Xunying
Dong, Wenjing
Wang, Baoyuan
Xia, Chen
author_facet Tu, Zhengwen
Tian, Yuanyuan
Liu, Mingyang
Jin, Bin
Akbar, Muhammad
Mushtaq, Naveed
Wang, Xunying
Dong, Wenjing
Wang, Baoyuan
Xia, Chen
author_sort Tu, Zhengwen
collection PubMed
description Recently, appreciable ionic conduction has been frequently observed in multifunctional semiconductors, pointing out an unconventional way to develop electrolytes for solid oxide fuel cells (SOFCs). Among them, ZnO and Li-doped ZnO (LZO) have shown great potential. In this study, to further improve the electrolyte capability of LZO, a typical ionic conductor Sm(0.2)Ce(0.8)O(1.9) (SDC) is introduced to form semiconductor-ionic composites with LZO. The designed LZO-SDC composites with various mass ratios are successfully demonstrated in SOFCs at low operating temperatures, exhibiting a peak power density of 713 mW cm(−2) and high open circuit voltages (OCVs) of 1.04 V at 550 °C by the best-performing sample 5LZO-5SDC, which is superior to that of simplex LZO electrolyte SOFC. Our electrochemical and electrical analysis reveals that the composite samples have attained enhanced ionic conduction as compared to pure LZO and SDC, reaching a remarkable ionic conductivity of 0.16 S cm(−1) at 550 °C, and shows hybrid H(+)/O(2)(−) conducting capability with predominant H(+) conduction. Further investigation in terms of interface inspection manifests that oxygen vacancies are enriched at the hetero-interface between LZO and SDC, which gives rise to the high ionic conductivity of 5LZO-5SDC. Our study thus suggests the tremendous potentials of semiconductor ionic materials and indicates an effective way to develop fast ionic transport in electrolytes for low-temperature SOFCs.
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spelling pubmed-84669032021-09-27 Remarkable Ionic Conductivity in a LZO-SDC Composite for Low-Temperature Solid Oxide Fuel Cells Tu, Zhengwen Tian, Yuanyuan Liu, Mingyang Jin, Bin Akbar, Muhammad Mushtaq, Naveed Wang, Xunying Dong, Wenjing Wang, Baoyuan Xia, Chen Nanomaterials (Basel) Article Recently, appreciable ionic conduction has been frequently observed in multifunctional semiconductors, pointing out an unconventional way to develop electrolytes for solid oxide fuel cells (SOFCs). Among them, ZnO and Li-doped ZnO (LZO) have shown great potential. In this study, to further improve the electrolyte capability of LZO, a typical ionic conductor Sm(0.2)Ce(0.8)O(1.9) (SDC) is introduced to form semiconductor-ionic composites with LZO. The designed LZO-SDC composites with various mass ratios are successfully demonstrated in SOFCs at low operating temperatures, exhibiting a peak power density of 713 mW cm(−2) and high open circuit voltages (OCVs) of 1.04 V at 550 °C by the best-performing sample 5LZO-5SDC, which is superior to that of simplex LZO electrolyte SOFC. Our electrochemical and electrical analysis reveals that the composite samples have attained enhanced ionic conduction as compared to pure LZO and SDC, reaching a remarkable ionic conductivity of 0.16 S cm(−1) at 550 °C, and shows hybrid H(+)/O(2)(−) conducting capability with predominant H(+) conduction. Further investigation in terms of interface inspection manifests that oxygen vacancies are enriched at the hetero-interface between LZO and SDC, which gives rise to the high ionic conductivity of 5LZO-5SDC. Our study thus suggests the tremendous potentials of semiconductor ionic materials and indicates an effective way to develop fast ionic transport in electrolytes for low-temperature SOFCs. MDPI 2021-09-01 /pmc/articles/PMC8466903/ /pubmed/34578593 http://dx.doi.org/10.3390/nano11092277 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
Tu, Zhengwen
Tian, Yuanyuan
Liu, Mingyang
Jin, Bin
Akbar, Muhammad
Mushtaq, Naveed
Wang, Xunying
Dong, Wenjing
Wang, Baoyuan
Xia, Chen
Remarkable Ionic Conductivity in a LZO-SDC Composite for Low-Temperature Solid Oxide Fuel Cells
title Remarkable Ionic Conductivity in a LZO-SDC Composite for Low-Temperature Solid Oxide Fuel Cells
title_full Remarkable Ionic Conductivity in a LZO-SDC Composite for Low-Temperature Solid Oxide Fuel Cells
title_fullStr Remarkable Ionic Conductivity in a LZO-SDC Composite for Low-Temperature Solid Oxide Fuel Cells
title_full_unstemmed Remarkable Ionic Conductivity in a LZO-SDC Composite for Low-Temperature Solid Oxide Fuel Cells
title_short Remarkable Ionic Conductivity in a LZO-SDC Composite for Low-Temperature Solid Oxide Fuel Cells
title_sort remarkable ionic conductivity in a lzo-sdc composite for low-temperature solid oxide fuel cells
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8466903/
https://www.ncbi.nlm.nih.gov/pubmed/34578593
http://dx.doi.org/10.3390/nano11092277
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