Synergistic Proton and Oxygen Ion Transport in Fluorite Oxide-Ion Conductor
Current perovskite oxide electrolytes, i.e., acceptor-doped Ba(Ce,Zr)O3-δ, exhibit proton conductivity ranging from 10−3 to 10−2 S cm−1 at 600 °C for protonic ceramic fuel cells (PCFCs), which rely on the structural defects. However, bulk doping and sintering restrict these oxides to possess higher...
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| Format: | Article |
| Language: | English |
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American Association for the Advancement of Science (AAAS)
2024-01-01
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| Series: | Energy Material Advances |
| Online Access: | https://spj.science.org/doi/10.34133/energymatadv.0081 |
| _version_ | 1797248483752673280 |
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| author | Yong Yu M.A.K. Yousaf Shah Hao Wang Xiaomeng Cheng Liejin Guo Jianbing Huang Peter Lund Bin Zhu |
| author_facet | Yong Yu M.A.K. Yousaf Shah Hao Wang Xiaomeng Cheng Liejin Guo Jianbing Huang Peter Lund Bin Zhu |
| author_sort | Yong Yu |
| collection | DOAJ |
| description | Current perovskite oxide electrolytes, i.e., acceptor-doped Ba(Ce,Zr)O3-δ, exhibit proton conductivity ranging from 10−3 to 10−2 S cm−1 at 600 °C for protonic ceramic fuel cells (PCFCs), which rely on the structural defects. However, bulk doping and sintering restrict these oxides to possess higher ionic conductivity. New-generation PCFCs with alternative ion conduction mechanism need to be developed. This study presents a novel approach to realize high proton conduction along a fluorite oxide-ion conductor gadolinium-doped ceria (GDC: Gd0.1Ce0.9O2-δ) by electrochemical proton injection via a fuel cell process. A high protonic conductivity of 0.158 S cm−1 has been achieved. This fuel cell employing a 400-μm-thick GDC electrolyte delivered a peak power output close to 1,000 mW cm−2 at 500 °C. Proton conduction is verified by electrochemical impedance spectroscopy, proton filtering cell and isotopic effect, and so on. Proton injection into GDC after fuel cell testing is clarified by x-ray photoelectron spectroscopy, Raman spectra, 1H solid-state nuclear magnetic resonance spectra, and so on. Furthermore, a synergistic mechanism involving both surface proton conduction and bulk oxygen-ion migration is proposed by comparing electrochemical impedance spectroscopy with distribution of relaxation time results of GDC and pure ceria. This finding may provide new insights into the ion transport mechanism on fluorite oxides and open new avenues for advanced low-temperature PCFCs. |
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| institution | Directory Open Access Journal |
| issn | 2692-7640 |
| language | English |
| last_indexed | 2024-04-24T20:15:19Z |
| publishDate | 2024-01-01 |
| publisher | American Association for the Advancement of Science (AAAS) |
| record_format | Article |
| series | Energy Material Advances |
| spelling | doaj.art-805dbe31db274d9b8d7e2ebc1c666ea32024-03-22T19:58:33ZengAmerican Association for the Advancement of Science (AAAS)Energy Material Advances2692-76402024-01-01510.34133/energymatadv.0081Synergistic Proton and Oxygen Ion Transport in Fluorite Oxide-Ion ConductorYong Yu0M.A.K. Yousaf Shah1Hao Wang2Xiaomeng Cheng3Liejin Guo4Jianbing Huang5Peter Lund6Bin Zhu7State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China.Jiangsu Provincial Key Laboratory of Solar Energy Science and Technology/Energy Storage Joint Research Center, School of Energy and Environment, Southeast University, Nanjing 210096, China.Jiangsu Provincial Key Laboratory of Solar Energy Science and Technology/Energy Storage Joint Research Center, School of Energy and Environment, Southeast University, Nanjing 210096, China.State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China.State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China.State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China.Jiangsu Provincial Key Laboratory of Solar Energy Science and Technology/Energy Storage Joint Research Center, School of Energy and Environment, Southeast University, Nanjing 210096, China.State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China.Current perovskite oxide electrolytes, i.e., acceptor-doped Ba(Ce,Zr)O3-δ, exhibit proton conductivity ranging from 10−3 to 10−2 S cm−1 at 600 °C for protonic ceramic fuel cells (PCFCs), which rely on the structural defects. However, bulk doping and sintering restrict these oxides to possess higher ionic conductivity. New-generation PCFCs with alternative ion conduction mechanism need to be developed. This study presents a novel approach to realize high proton conduction along a fluorite oxide-ion conductor gadolinium-doped ceria (GDC: Gd0.1Ce0.9O2-δ) by electrochemical proton injection via a fuel cell process. A high protonic conductivity of 0.158 S cm−1 has been achieved. This fuel cell employing a 400-μm-thick GDC electrolyte delivered a peak power output close to 1,000 mW cm−2 at 500 °C. Proton conduction is verified by electrochemical impedance spectroscopy, proton filtering cell and isotopic effect, and so on. Proton injection into GDC after fuel cell testing is clarified by x-ray photoelectron spectroscopy, Raman spectra, 1H solid-state nuclear magnetic resonance spectra, and so on. Furthermore, a synergistic mechanism involving both surface proton conduction and bulk oxygen-ion migration is proposed by comparing electrochemical impedance spectroscopy with distribution of relaxation time results of GDC and pure ceria. This finding may provide new insights into the ion transport mechanism on fluorite oxides and open new avenues for advanced low-temperature PCFCs.https://spj.science.org/doi/10.34133/energymatadv.0081 |
| spellingShingle | Yong Yu M.A.K. Yousaf Shah Hao Wang Xiaomeng Cheng Liejin Guo Jianbing Huang Peter Lund Bin Zhu Synergistic Proton and Oxygen Ion Transport in Fluorite Oxide-Ion Conductor Energy Material Advances |
| title | Synergistic Proton and Oxygen Ion Transport in Fluorite Oxide-Ion Conductor |
| title_full | Synergistic Proton and Oxygen Ion Transport in Fluorite Oxide-Ion Conductor |
| title_fullStr | Synergistic Proton and Oxygen Ion Transport in Fluorite Oxide-Ion Conductor |
| title_full_unstemmed | Synergistic Proton and Oxygen Ion Transport in Fluorite Oxide-Ion Conductor |
| title_short | Synergistic Proton and Oxygen Ion Transport in Fluorite Oxide-Ion Conductor |
| title_sort | synergistic proton and oxygen ion transport in fluorite oxide ion conductor |
| url | https://spj.science.org/doi/10.34133/energymatadv.0081 |
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