Non-aqueous organic electrolyte, lithium ion secondary battery containing nonaqueous organic electrolytes, production method of lithium ion secondary battery and communication terminal

摘要

Embodiments of the present invention provide a non-aqueous organic electrolyte, a lithium ion secondary battery containing the non-aqueous organic electrolyte, a manufacturing method for the lithium ion secondary battery, and a communication terminal. The non-aqueous organic electrolyte comprises: a lithium sa a non-aqueous organic solvent comprising γ-butyrolactone and a saturated cyclic ester compound shown in formula (I); an unsaturated cyclic ester compound shown in formula (II); and a dinitrile compound shown in formula (III). The non-aqueous organic electrolyte has excellent chemical stability and electrochemical stability, and can inhibit decomposition of an electrolyte solvent under a high voltage and aerogenically expand the lithium ion secondary battery at a high temperature during storage, which is satisfactory for the use of high voltage lithium ion secondary batteries. A positive electrode active material of the lithium ion secondary battery is a mixture of a spinel structural material and a laminated solid solution material, and after providing the above non-aqueous organic electrolyte, the positive electrode active material has excellent high temperature storage and safety performance when used under a fully charged high voltage state.