Fabrication of Li-intercalated bilayer graphene
Fabrication of Li-intercalated bilayer graphene
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DOI：
10.1063/1.3582814
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发表时间：
2011-04
期刊：
影响因子：
1.6
通讯作者：
K. Sugawara;K. Kanetani;Takafumi Sato;Takashi Takahashi
中科院分区：
文献类型：
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作者：
K. Sugawara;K. Kanetani;Takafumi Sato;Takashi Takahashi
我们成功地在碳化硅上制备了锂嵌入双层石墨烯。与锂离子沉积单层石墨烯相比，锂离子沉积双层石墨烯的低能电子衍射显示出明显的3×3R30°图案。这表明锂原子嵌入在相邻的两层石墨烯之间，并具有与本体C6Li相同的有序上层结构。角分解光发射光谱显示，锂原子被完全电离，石墨烯的π带被嵌入的锂原子的上层结构系统地折叠，形成以Γ点为中心的雪花状费米表面。目前的结果表明，锂嵌入双层石墨烯在纳米级锂离子电池中的应用具有很高的潜力。
We have succeeded in fabricating Li-intercalated bilayer graphene on silicon carbide. The low-energy electron diffraction from Li-deposited bilayer graphene shows a sharp 3×3R30° pattern in contrast to Li-deposited monolayer graphene. This indicates that Li atoms are intercalated between two adjacent graphene layers and take the same well-ordered superstructure as in bulk C6Li. The angle-resolved photoemission spectroscopy has revealed that Li atoms are fully ionized and the π bands of graphene are systematically folded by the superstructure of intercalated Li atoms, producing a snowflake-like Fermi surface centered at the Γ point. The present result suggests a high potential of Li-intercalated bilayer graphene for application to a nano-scale Li-ion battery.