An object of the present invention is to provide an electrolyte system for maintaining the energy density of the lithium metal anode-based secondary battery and extending the battery life. The ultimate application goal of this technology is various anodes such as transition metal oxides, sulfur and air cathodes used in lithium metal secondary batteries with high energy density, in addition to existing lithium ion batteries used in future unmanned electric vehicles and power grid energy storage systems. Lithium metal is used together with. It will also contribute to the development of unmanned aerial vehicles such as drones. It is expected that the present invention can secure the global competitiveness of the related secondary battery and electrochemical capacitor industries. In particular, when dealing with high-density materials, safety studies have recently attracted attention as one of the key studies. The reason is that the safety is reduced due to the implementation of a high energy density in commercializing the product. It is inevitable to secure battery safety with high energy density, especially due to the social and technological winds caused by the recent ignition of smartphones. In particular, the upcoming next-generation batteries are subject to research and verification on the safety of cells and systems that handle batteries because the energy density of existing lithium-ion batteries is substantially at least 2 to 8 times higher. Therefore, the present invention is a stable SEI film capable of suppressing the formation and diffusion of lithium dendrites so as to stabilize the lithium metal negative electrode of a lithium metal secondary battery having a high probability of battery ignition and prevent internal short circuits, thereby forming a Ti 2 C thin film. Technology can be provided.
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