| Project/Area Number |
16K18242
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Tokyo University of Science |
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Principal Investigator |
Kubota Kei 東京理科大学, 理学部第一部応用化学科, 講師 (50709756)
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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| Keywords | ナトリウム遷移金属酸化物 / 正極材料 / 電池材料 / ナトリウムイオン電池 / カリウムイオン電池 / 二次電池 / 機能性セラミックス材料 / 固体イオニクス材料 / 構造・機能材料 |
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| Outline of Final Research Achievements |
Layered transition-metal oxides and phosphates have been extensively studied as positive electrode materials for Li- and Na-ion batteries. The materials generally consist of MeO6 (Me: transition metals) octahedra in the structure. In order to find new high-performance materials for batteries, alkali-metal containing transition-metal oxides with a MeO4 tetrahedra and the related frameworks are synthesized, and their electrochemical properties are examined. Beta-NaFeO2 shows electrochemically inactive in the Na electrochemical cell. Na4Mn2O5, however, delivers reversible capacities in the Na cell. Furthermore, KCoO2 which has a MeO5 pyramid framework, was evaluated in Li, Na, K cells and amorphization during charge. These results reveal that the materials show obvious difference in voltage curves depending on the polyhedral framework structures as well as transition metals.
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