Solid electrolyte interphase comprising amino functionalized reduced graphene oxide thin film for protecting anode of rechargeable battery, preparation method thereof and lithium metal battery comprising the same

It is an object of the present invention to provide an electrolyte system for maintaining energy density and extending battery life of a lithium metal negative electrode based secondary battery. The ultimate application goal of this technology is a variety of anodes such as transition metal oxides, sulfur, and cathodes used in lithium-ion secondary batteries with high energy density, as well as existing lithium-ion batteries used in future unmanned electric vehicles and grid energy storage systems. Together with lithium metal. It will also contribute to the development of drones such as the new drone. The present invention is expected to secure the global competitiveness of the related secondary battery and electrochemical capacitor industry. Especially when dealing with materials with high density energy, the recent research on safety has attracted attention as one of the core research. The reason for this is that safety is lowered due to high energy density in product commercialization. In particular, it is inevitable to secure high energy density battery safety due to the social and technological winds caused by smartphone ignition. In particular, the upcoming next-generation batteries must be researched and confirmed on the safety of the battery and the battery handling system since the energy density of the existing lithium-ion battery is substantially at least 2 to 8 times higher. Accordingly, the present invention forms a negative electrode protective solid-electrolyte intermediate phase for a secondary battery comprising an amino functionalized reduced graphene oxide thin film on the negative electrode material foil, by using this to generate the dendrites through rapid diffusion and stable electrodeposition of lithium ions In addition, the present invention can be used as a negative electrode for a lithium metal secondary battery having stable and high coulombic efficiency by preventing side reaction between the lithium metal electrode and the electrolyte solution.