Intercalation mechanism of two dimensional battery materials studied by advanced TEMs

利用先进 TEM 研究二维电池材料的插层机理

• 批准号: 22KF0245
• 负责人: 末永 和知
• 金额: $ 1.47万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2023
• 资助国家: 日本
• 起止时间: 2023-03-08 至 2025-03-31
• 项目状态: 未结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22KF0245/
• 关键词: EELS; STEM; intercalation

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.

在过去的一年中，我们的研究集中在两个主要方向上。首先，我们使用先进的扫描电子显微镜（stem）中的电子束在单层MOS2上实现了单层MOS2上五种碱金属的原位掺杂。此外，我们使用高级鳗鱼系统获得了具有不同相的MOS2的电子结构指纹光谱。这些光谱包括激子光谱，Mo-L边缘（代表MO的价态）和S-L边缘光谱。第二，我们的研究涉及研究偶联成双层石墨烯（BLG）的钼（起始材料：MOCL5）的结构。使用STEM，我们发现插入的材料由MOCL3网络，MOCL2链和MO5CL10环组成。这些观察结果表明，在其他金属氯化物系统中未观察到的2D MOCLX中的晶格扭曲和频繁的结构过渡。