ELECTROLYTE HAVING IONIC LIQUID TYPE METERIAL, AND MANUFACTURING OF THE SAME, AND LITHIUM-ION SECONDARY BATTERY HAVING CATHODE CONTAINING EXCESS AMOUNT OF NICKEL

摘要

In the present invention, provided are an electrolyte including an ionic liquid-based material, a manufacturing method thereof, and a lithium ion secondary battery having a nickel-rich anode. The high discharge capacity, which is a feature of the nickel-rich anode can be maintained while improving a performance, a lifespan, and safety by preventing deterioration of the nickel-rich anode from occurring and by preventing a side reaction on the surface of the nickel-rich anode based on a film formed on the surface of the nickel-rich anode even though the nickel-rich anode containing an excessive amount of nickel is exposed to a high temperature with consideration for the discharge capacity or the like. The manufacturing method of an ionic liquid-based electrolyte for a material of the nickel-rich anode comprises the following steps: synthesizing the ammonium-based ionic liquid-based material which is an intermediate represented by chemical formula 1 by performing a quaternization reaction with a substituent by using primary to tertiary amine as a starting material; and synthesizing the ionic liquid-based material represented by chemical formula 2 with the intermediate through an anation reaction in order to suppress a swelling phenomenon in the material of the nickel-rich anode of the lithium ion secondary battery, and to form the film on the surface of the material of the nickel-rich anode.