Non-aqueous electrolyte and electrochemical device comprising the same

Disclosed is a non-aqueous electrolyte comprising: an electrolyte salt; ; an organic solvent; a sulfinyl group-containing compound; and an acrylate compound having one or more acryl group in its molecule as an additive. Also, disclosed is an electrode comprising a coating layer formed partially or totally on a surface thereof, the coating layer comprising: (i) a reduced form of an acrylate compound; and (ii) a reduced form of a sulfinyl group-containing compound which is obtained by the non-aqueous electrolyte. Further, disclosed is an electrochemical device comprising a cathode, an anode and a non-aqueous electrolyte, wherein (i) the non-aqueous electrolyte is the aforementioned non-aqueous electrolyte; and/or (ii) the cathode and/or the anode is the aforementioned electrode.