Development of efficient low-cost SOFC/SOEC protonic cathodes for reliable energy distribution
| Project/Area Number |
19K05672
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 36020:Energy-related chemistry
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| Research Institution | Kyushu University |
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Principal Investigator |
Kwati Leonard 九州大学, カーボンニュートラル・エネルギー国際研究所, 助教 (70734391)
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Project Status |
Granted (Fiscal Year 2019)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | protonic cathode / fuel cell / electrolysis cell / reliable energy / low cost / proton transport / robust air electrodes / Proton conductor / SOFC/SOEC / sustainable Energy |
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| Outline of Research at the Start |
Development of efficient low-cost SOFC/SOEC protonic cathodes for reliable energy distribution. I will synthesize and evaluate, robust highly active mixed protonic /electronic conducting cathode materials for operation at 600 ~ 400 °C, by investigating the synergistic effect of co-doping niobium (Nb5+), tantalum (Ta5+) and/or Zn2+, Sc3+ on the B-site of cation-ordered double perovskite, in an effort to enhance hydrogen incorporation and to create channels for fast diffusion. Research these cathodes will improve cell reliability, reduce costs and expedite commercialization of SOFC/SOEC
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| Outline of Annual Research Achievements |
Oxide proton conductors are promising electrolytes for low-temperature solid oxide fuel and Electrolysis cells (SOFC/SOECs). This is because of their relatively high ionic conductivities at low temperatures. The main objective of the current work is the development of efficient, low-cost SOFC/SOEC protonic cathodes for reliable energy distribution. During the past year, I have made progress in two front. Firstly, the synthesis, evaluation, and screening of new protonic cathode materials, which is the primary task of phase 1, conducted in parallel with the fabrication of tri-layered half and single-cell assemblies using tape casting to evaluate the electrode performances. A series of Co-rich double and single perovskites oxide with different compositions (BaPrCo2-xNbxO6-δ, BaLaCo1-xNbxO3-δ, and BaLaCo2O6-δ where ×=0-0.2) were prepared via solid-state reaction and wet chemical solution procedures to investigate the effect of Nb content on the electrode performance. The microstructure, as well as the electrochemical properties, are also investigated and compared with those of the parent materials (BaPrCo2O6-δ, and BaLaCoO3-δ). Particular attention has been focus on the parent material to thoroughly understand and validate models for predicting protonic and/or oxygen transport properties of the cathode material. Work on proton kinetics through the bulk of both materials by isotope exchange experiments (18O and 2D2O tracers) and Time-of-Flight Secondary Ion Mass Spectrometry depth profiling is ongoing, but has been delayed by the present COVID-19 pandemic.
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| Current Status of Research Progress |
Current Status of Research Progress
3: Progress in research has been slightly delayed.
Reason
Mainly due to temporal suspension of university laboratory work due to the COVID-19 pandemic.
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| Strategy for Future Research Activity |
Continue with the synthesis, characterizations and screening of new air electrode materials. Qualitative and quantitative assessment of proton concentration in the best performing as-synthesized protonic cathode materials as well as proton transport mechanism. Protons kinetics through the bulk by Isotope-exchange. Computational modeling to gain proper understanding of the transport properties, of the materials. Develop and validate computational models for predicting protonic electrode materials.
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Report
(1 results)
Research Products
(3 results)
