▎ 摘　　要

NOVELTY - Lithium battery electrolyte comprises e.g. an electrolyte, an organic solvent and an additive, where the electrolyte is lithium iron phosphate. The organic solvent includes polycarbonate (PC) and diethylcarbamazine (DEC). The additive is multi-layer graphene. The multilayer graphene includes a many of layers of flaky graphene and diamond. The diamond is located between two adjacent layers of the multilayered sheet-type grapheme. The diamond corresponds to the carbon atoms of the multilayered sheet graphene one by one. USE - Used as lithium battery electrolyte. ADVANTAGE - The electrolyte has high temperature, increases battery heat-conducting performance in the environment with high temperature, and can make battery in work can balance the heat transmission faster; reduces the internal temperature of battery and tends to be stable, has good conductivity, reduces the internal resistance of the battery, battery has 75 degrees C of high temperature, improves the safety of lithium battery and prolongs the service life. DETAILED DESCRIPTION - Lithium battery electrolyte comprises an electrolyte, an organic solvent and an additive, where the electrolyte is 10-18 wt.% lithium iron phosphate. The organic solvent includes 38-42 wt.% polycarbonate (PC) and 38-42 wt.% diethylcarbamazine (DEC). The additive is 5-8 wt.% multi-layer graphene. The multilayer graphene includes a many of layers of flaky graphene and diamond. The diamond is located between two adjacent layers of the multilayered sheet-type grapheme. The diamond corresponds to the carbon atoms of the multilayered sheet graphene one by one, and the weight ratio of multilayer graphene and diamond is (4-6):1. The multi-layer graphene sheet is 6-8 layers of graphene sheet, and the thickness of each layer of the multilayer sheet-shaped graphene is 0.3-1.0 nm. The adjacent two layers of the multilayer sheet-shaped graphene spacing is 0.1-0.5 nm. The diamond is spherical carbon, and the grain diameter of the ball-shaped carbon is 0.7-1.6 nm. An INDEPENDENT CLAIM is also included for preparing electrolyte comprising adding lithium iron phosphate, PC, DEC and multi-layer graphene into the mixing tank at 0-5oC, under vacuum conditions of lithium-ion battery electrolyte is 100-500 Pa, stirring for 12-24 hours while maintaining the vacuum at a stirring speed of 500-1000 rotations/minute.