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.

在过去的一年里，我们的研究主要集中在两个方面。首先，我们在先进的扫描电子显微镜（STEM）中使用电子束实现了五种碱金属在单层MoS 2上的原位掺杂。此外，我们还利用先进的EELS系统获得了不同相态MoS 2的电子结构指纹谱。这些光谱包括激子谱、Mo-L边（代表Mo的价态）谱和S-L边谱。其次，研究了氯化钼（MoCl 5）插层到双层石墨烯（BLG）中的结构。使用STEM，我们发现插层材料由MoCl 3网络，MoCl 2链和Mo 5Cl 10环组成。这些观察揭示了在2D MoClx中显著的晶格畸变和频繁的结构转变，这在其他金属氯化物系统中没有观察到。