Lithium ion battery electrolyte, lithium ion battery and vehicle

• Main Author: YANG CHUANJING
• Format: Patent
• Language: Chinese; English
• Published: 19.09.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention belongs to the field of lithium ion batteries, and particularly relates to a lithium ion battery electrolyte and a lithium ion battery. The lithium ion battery electrolyte provided by the invention comprises a first compound and a second compound, the structure of the first compound is as follows: # imgabs0 #, and R1, R2 and R3 are respectively and independently selected from alkyl with 1-4 carbon atoms; r4 is selected from alkylene with the carbon atom number of 1-5; the second compound is a nitrile compound. The lithium ion battery electrolyte provided by the embodiment of the invention can eliminate HF and H2O generated under a high-temperature condition, can effectively prevent the HF and H2O from attacking CEI and the surface of a positive electrode material, and improves the stability of a positive electrode interface at a high temperature, so that the thermal stability of a lithium ion battery is improved, and meanwhile, the lithium ion battery can keep good electrochemical performance. 本