| 摘要 |
PURPOSE: An UV-curing multi-component polymer blend electrolyte, a lithium secondary battery containing the electrolyte and their preparation methods are provided, to improve the adhesive strength, the mechanical properties, the low and high temperature characteristic, the high rate discharge capacity, the lifetime, the capacity and the stability of a battery. CONSTITUTION: The UV-curing multi-component polymer blend electrolyte comprises a function-I polymer; a function-II polymer; a function-III polymer; an organic electrolyte solution which is prepared by dissolving a lithium salt into an organic solvent; and optionally at least one selected from the group consisting of a plasticizer, a porous filler, a UV curing initiator and a curing accelerator. The function-I polymer is obtained by UV curing the ethylene glycol di(meth)acrylate oligomer represented by the formula CH2=CR1COO(CH2CH2O)nCOCR2=CH2, wherein R1 and R2 are independent each other and are H or methyl group and n is an integer of 3-20; the function-II polymer is selected from the group consisting of polyacrylonitrile, poly(methyl methacrylate) and their mixture; and the function-III polymer is selected from the group consisting of polyvinylidene fluoride, poly(vinyl chloride) and their mixture. Preferably the lithium salt is selected from the group consisting of LiPF6, LiClO4, LiAsF6, LiBF4, LiCF3SO3, Li(CF3SO2)2N and their mixtures; and the organic solvent is selected from the group consisting of ethylene carbonate, propylene carbonate, diethyl carbonate, dimethyl carbonate, ethylmethyl carbonate and their mixtures. |
