Lithium ion battery electrolyte and lithium ion battery containing same

According to the lithium ion battery electrolyte and a lithium ion battery containing the electrolyte, a first additive of an imidazole and the nitrile pyrrole compound is added in the electrolyte, the first additive has a stronger complexing effect with transition metal ions under high voltage, so that the reaction activity of the surface of an electrode can be inhibited, and the oxygenolysis of the electrolyte at high temperature is reduced; a low-impedance SEI film can be preferentially reduced at the negative electrode of the battery, so that the low-temperature characteristic of the lithium ion battery is improved; besides, lone pair electrons exist on N atoms contained in the electrolyte, so that the electrolyte is easily oxidized to form a protective film to cover a positive electrode when the positive electrode of the battery loses electrons, thereby inhibiting the oxygenolysis of the electrolyte on the positive electrode and improving the high-temperature storage performance of the lithium ion batter