Syntheses of new carbon-based superconductors using solution-process and electrochemical process

用溶液法和电化学法研究了金属原子在不同类型碳材料中的嵌入。Li掺杂的菲烯表现出超导性，其超导转变温度（Tc）高达11 K，而K掺杂的[6]菲烯也表现出6 K的超导转变温度。此外，还研究了金属嵌入石墨，从而提供超导材料。在CaC6中，最高的Tc为11.5 K，与高温合成方法制备的Li/Ca合金相同。我们尝试通过金属原子嵌入到二维FeSe晶体中来制作超导材料，并成功制作出多种超导材料；在高压下达到了46k的Tc。利用双电层电容器也实现了高密度载流子在菲苯薄膜和晶体中的积累。

An intercalation of metal atoms into various types of carbon materials was examined using a solution process and an electrochemical process. The Li doped picene shows the superconductivity with a superconducting transition temperature (Tc) as high as 11 K, while the K doped [6]phenacene also shows the Tc of 6 K. Furthermore, the metal-intercalation into graphite was also investigated, which provides the superconducting materials. The highest Tc is now 11.5 K in CaC6, which is the same as that prepared using high-temperature synthesis method with Li/Ca alloy. We tried to make superconducting materials through the intercalation of metal atoms into two-dimensional FeSe crystals, and diverse superconducting materials were successfully produced; the Tc of 46 K is achieved under high pressure. The high-density carrier accumulation into phenacene thin film and crystal was also achieved using electric-double-layer capacitor.