Cargando…
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...
Autores principales: | , , , , , , , , , |
---|---|
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 |
_version_ | 1784573259668258816 |
---|---|
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. |
format | Online Article Text |
id | pubmed-8466903 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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 |
work_keys_str_mv | AT tuzhengwen remarkableionicconductivityinalzosdccompositeforlowtemperaturesolidoxidefuelcells AT tianyuanyuan remarkableionicconductivityinalzosdccompositeforlowtemperaturesolidoxidefuelcells AT liumingyang remarkableionicconductivityinalzosdccompositeforlowtemperaturesolidoxidefuelcells AT jinbin remarkableionicconductivityinalzosdccompositeforlowtemperaturesolidoxidefuelcells AT akbarmuhammad remarkableionicconductivityinalzosdccompositeforlowtemperaturesolidoxidefuelcells AT mushtaqnaveed remarkableionicconductivityinalzosdccompositeforlowtemperaturesolidoxidefuelcells AT wangxunying remarkableionicconductivityinalzosdccompositeforlowtemperaturesolidoxidefuelcells AT dongwenjing remarkableionicconductivityinalzosdccompositeforlowtemperaturesolidoxidefuelcells AT wangbaoyuan remarkableionicconductivityinalzosdccompositeforlowtemperaturesolidoxidefuelcells AT xiachen remarkableionicconductivityinalzosdccompositeforlowtemperaturesolidoxidefuelcells |