A bulk-heterostructure nanocomposite electrolyte of Ce0.8Sm0.2O2-δ–SrTiO3 for low-temperature solid oxide fuel cells
Since colossal ionic conductivity was detected in the planar heterostructures consisting of fluorite and perovskite, heterostructures have drawn great research interest as potential electrolytes for solid oxide fuel cells (SOFCs). However, so far, the practical uses of such promising material have f...
| Main Authors: | , , , , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2021
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/151072 |
| _version_ | 1811686671243018240 |
|---|---|
| author | Cai, Yixiao Chen, Yang Akbar, Muhammad Jin, Bin Tu, Zhengwen Mushtaq, Naveed Wang, Baoyuan Qu, Xiangyang Xia, Chen Huang, Yizhong |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Cai, Yixiao Chen, Yang Akbar, Muhammad Jin, Bin Tu, Zhengwen Mushtaq, Naveed Wang, Baoyuan Qu, Xiangyang Xia, Chen Huang, Yizhong |
| author_sort | Cai, Yixiao |
| collection | NTU |
| description | Since colossal ionic conductivity was detected in the planar heterostructures consisting of fluorite and perovskite, heterostructures have drawn great research interest as potential electrolytes for solid oxide fuel cells (SOFCs). However, so far, the practical uses of such promising material have failed to materialize in SOFCs due to the short circuit risk caused by SrTiO3. In this study, a series of fluorite/perovskite heterostructures made of Sm-doped CeO2 and SrTiO3 (SDC–STO) are developed in a new bulk-heterostructure form and evaluated as electrolytes. The prepared cells exhibit a peak power density of 892 mW cm−2 along with open circuit voltage of 1.1 V at 550 °C for the optimal composition of 4SDC–6STO. Further electrical studies reveal a high ionic conductivity of 0.05–0.14 S cm−1 at 450–550 °C, which shows remarkable enhancement compared to that of simplex SDC. Via AC impedance analysis, it has been shown that the small grain-boundary and electrode polarization resistances play the major roles in resulting in the superior performance. Furthermore, a Schottky junction effect is proposed by considering the work functions and electronic affinities to interpret the avoidance of short circuit in the SDC–STO cell. Our findings thus indicate a new insight to design electrolytes for low-temperature SOFCs. |
| first_indexed | 2024-10-01T05:04:07Z |
| format | Journal Article |
| id | ntu-10356/151072 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:04:07Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1510722023-07-14T16:04:06Z A bulk-heterostructure nanocomposite electrolyte of Ce0.8Sm0.2O2-δ–SrTiO3 for low-temperature solid oxide fuel cells Cai, Yixiao Chen, Yang Akbar, Muhammad Jin, Bin Tu, Zhengwen Mushtaq, Naveed Wang, Baoyuan Qu, Xiangyang Xia, Chen Huang, Yizhong School of Materials Science and Engineering Engineering::Materials Bulk-heterostructure Solid Oxide Fuel Cell Electrolyte Since colossal ionic conductivity was detected in the planar heterostructures consisting of fluorite and perovskite, heterostructures have drawn great research interest as potential electrolytes for solid oxide fuel cells (SOFCs). However, so far, the practical uses of such promising material have failed to materialize in SOFCs due to the short circuit risk caused by SrTiO3. In this study, a series of fluorite/perovskite heterostructures made of Sm-doped CeO2 and SrTiO3 (SDC–STO) are developed in a new bulk-heterostructure form and evaluated as electrolytes. The prepared cells exhibit a peak power density of 892 mW cm−2 along with open circuit voltage of 1.1 V at 550 °C for the optimal composition of 4SDC–6STO. Further electrical studies reveal a high ionic conductivity of 0.05–0.14 S cm−1 at 450–550 °C, which shows remarkable enhancement compared to that of simplex SDC. Via AC impedance analysis, it has been shown that the small grain-boundary and electrode polarization resistances play the major roles in resulting in the superior performance. Furthermore, a Schottky junction effect is proposed by considering the work functions and electronic affinities to interpret the avoidance of short circuit in the SDC–STO cell. Our findings thus indicate a new insight to design electrolytes for low-temperature SOFCs. Published version The authors acknowledge funding from the Shanghai Pujiang Program, the National Natural Science Foundation of China (12004103), Hubei Provincial Natural Science Foundation of China (No. 2020CFB414), Fundamental Research Funds for the Central Universities (19D111317, 20D110638/003 and 274-10-0001/003), and start-up grant from Donghua University (No. 113-07-0053058). 2021-06-28T02:35:19Z 2021-06-28T02:35:19Z 2021 Journal Article Cai, Y., Chen, Y., Akbar, M., Jin, B., Tu, Z., Mushtaq, N., Wang, B., Qu, X., Xia, C. & Huang, Y. (2021). A bulk-heterostructure nanocomposite electrolyte of Ce0.8Sm0.2O2-δ–SrTiO3 for low-temperature solid oxide fuel cells. Nano-Micro Letters, 13(1), 46-. https://dx.doi.org/10.1007/s40820-020-00574-3 2311-6706 https://hdl.handle.net/10356/151072 10.1007/s40820-020-00574-3 2-s2.0-85098656169 1 13 46 en Nano-Micro Letters © 2021 The Author(s). Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. application/pdf |
| spellingShingle | Engineering::Materials Bulk-heterostructure Solid Oxide Fuel Cell Electrolyte Cai, Yixiao Chen, Yang Akbar, Muhammad Jin, Bin Tu, Zhengwen Mushtaq, Naveed Wang, Baoyuan Qu, Xiangyang Xia, Chen Huang, Yizhong A bulk-heterostructure nanocomposite electrolyte of Ce0.8Sm0.2O2-δ–SrTiO3 for low-temperature solid oxide fuel cells |
| title | A bulk-heterostructure nanocomposite electrolyte of Ce0.8Sm0.2O2-δ–SrTiO3 for low-temperature solid oxide fuel cells |
| title_full | A bulk-heterostructure nanocomposite electrolyte of Ce0.8Sm0.2O2-δ–SrTiO3 for low-temperature solid oxide fuel cells |
| title_fullStr | A bulk-heterostructure nanocomposite electrolyte of Ce0.8Sm0.2O2-δ–SrTiO3 for low-temperature solid oxide fuel cells |
| title_full_unstemmed | A bulk-heterostructure nanocomposite electrolyte of Ce0.8Sm0.2O2-δ–SrTiO3 for low-temperature solid oxide fuel cells |
| title_short | A bulk-heterostructure nanocomposite electrolyte of Ce0.8Sm0.2O2-δ–SrTiO3 for low-temperature solid oxide fuel cells |
| title_sort | bulk heterostructure nanocomposite electrolyte of ce0 8sm0 2o2 δ srtio3 for low temperature solid oxide fuel cells |
| topic | Engineering::Materials Bulk-heterostructure Solid Oxide Fuel Cell Electrolyte |
| url | https://hdl.handle.net/10356/151072 |
| work_keys_str_mv | AT caiyixiao abulkheterostructurenanocompositeelectrolyteofce08sm02o2dsrtio3forlowtemperaturesolidoxidefuelcells AT chenyang abulkheterostructurenanocompositeelectrolyteofce08sm02o2dsrtio3forlowtemperaturesolidoxidefuelcells AT akbarmuhammad abulkheterostructurenanocompositeelectrolyteofce08sm02o2dsrtio3forlowtemperaturesolidoxidefuelcells AT jinbin abulkheterostructurenanocompositeelectrolyteofce08sm02o2dsrtio3forlowtemperaturesolidoxidefuelcells AT tuzhengwen abulkheterostructurenanocompositeelectrolyteofce08sm02o2dsrtio3forlowtemperaturesolidoxidefuelcells AT mushtaqnaveed abulkheterostructurenanocompositeelectrolyteofce08sm02o2dsrtio3forlowtemperaturesolidoxidefuelcells AT wangbaoyuan abulkheterostructurenanocompositeelectrolyteofce08sm02o2dsrtio3forlowtemperaturesolidoxidefuelcells AT quxiangyang abulkheterostructurenanocompositeelectrolyteofce08sm02o2dsrtio3forlowtemperaturesolidoxidefuelcells AT xiachen abulkheterostructurenanocompositeelectrolyteofce08sm02o2dsrtio3forlowtemperaturesolidoxidefuelcells AT huangyizhong abulkheterostructurenanocompositeelectrolyteofce08sm02o2dsrtio3forlowtemperaturesolidoxidefuelcells AT caiyixiao bulkheterostructurenanocompositeelectrolyteofce08sm02o2dsrtio3forlowtemperaturesolidoxidefuelcells AT chenyang bulkheterostructurenanocompositeelectrolyteofce08sm02o2dsrtio3forlowtemperaturesolidoxidefuelcells AT akbarmuhammad bulkheterostructurenanocompositeelectrolyteofce08sm02o2dsrtio3forlowtemperaturesolidoxidefuelcells AT jinbin bulkheterostructurenanocompositeelectrolyteofce08sm02o2dsrtio3forlowtemperaturesolidoxidefuelcells AT tuzhengwen bulkheterostructurenanocompositeelectrolyteofce08sm02o2dsrtio3forlowtemperaturesolidoxidefuelcells AT mushtaqnaveed bulkheterostructurenanocompositeelectrolyteofce08sm02o2dsrtio3forlowtemperaturesolidoxidefuelcells AT wangbaoyuan bulkheterostructurenanocompositeelectrolyteofce08sm02o2dsrtio3forlowtemperaturesolidoxidefuelcells AT quxiangyang bulkheterostructurenanocompositeelectrolyteofce08sm02o2dsrtio3forlowtemperaturesolidoxidefuelcells AT xiachen bulkheterostructurenanocompositeelectrolyteofce08sm02o2dsrtio3forlowtemperaturesolidoxidefuelcells AT huangyizhong bulkheterostructurenanocompositeelectrolyteofce08sm02o2dsrtio3forlowtemperaturesolidoxidefuelcells |