| 研究課題/領域番号 |
22F22358
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| 配分区分 | 補助金 |
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| 研究機関 | 大阪大学 |
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研究代表者 |
末永 和知 大阪大学, 産業科学研究所, 教授 (00357253)
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| 研究分担者 |
LIU QIUNAN 大阪大学, 産業科学研究所, 外国人特別研究員
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| 研究期間 (年度) |
2022-09-28 – 2025-03-31
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| キーワード | EELS / STEM / intercalation |
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| 研究実績の概要 |
In the past year, our research focused on two main directions. Firstly, we achieved in-situ doping of five types of alkali metals on monolayer MoS2 using an electron beam in an advanced scanning electron microscope (STEM). Additionally, we obtained electronic structure fingerprint spectra of MoS2 with different phases using an advanced EELS system. These spectra included exciton spectra, Mo-L edge (representing the valence state of Mo), and S-L edge spectra.
Secondly, our research involved studying the structure of molybdenum chlorides (starting material: MoCl5) intercalated into bilayer graphene (BLG). Using STEM, we discovered that the intercalated material consists of MoCl3 networks, MoCl2 chains, and Mo5Cl10 rings. These observations revealed significant lattice distortions and frequent structural transitions in the 2D MoClx, which have not been observed in other metal chloride systems.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
We completed the characterization of the results regarding the doping of five types of alkali metals on monolayer MoS2, as well as DFT calculations of electron charge transfer from alkali metal to MoS2. This work has the potential to offer valuable insights for future applications in energy, catalysis, electronic devices, and other fields. Currently, we are writing a paper based on this project.
We have finalized the manuscript and already submitted. This work aims to enhance our understanding of the behavior of matter within the confined space of the vdW gap in BLG and provides valuable insights for more efficient tuning of material properties through intercalation, opening possibilities for potential applications. We hope for a successful publication of this paper soon.
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| 今後の研究の推進方策 |
1 Complete the manuscript on the in-situ alkali metal doping of MoS2.
2 Continue intercalation experiments on various 2D materials, ranging from monolayer to multilayer structures. Additionally, establish a practical alkali metal-ion battery to study the ex-situ intercalation and de-intercalation processes of 2D electrode materials, enabling real-time monitoring of battery materials.
3 Utilize our advanced EELS system to quantitatively examine changes in the electronic structure of 2D materials resulting from alkali metal intercalation. Conduct systematic studies on the material's physical properties during different cycling stages of macroscopic battery processes. The aim is to provide a theoretical foundation for developing efficient, high-capacity, and long-lasting metal batteries.
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