| abstract |
The present invention relates to a lithium secondary battery electrolyte and a lithium battery comprising the same, wherein the electrolyte is a non-aqueous organic solvent; Lithium salts; And an additive, the additive comprising: a) a sulfone organic compound; And b) an organic peroxide or azo compound having 3 to 30 carbon atoms. The electrolyte of the present invention may further include a poly (ester) (meth) acrylate or a polymer thereof, and the poly (ester) (meth) acrylate may be formed of a (polyester) polyol having three or more hydroxyl groups (—OH). A polymer in which some or all of the hydroxyl groups (-OH) are converted to (meth) acrylic acid esters, and the unreacted hydroxyl groups (-OH), which are not substituted by the (meth) acrylic acid esters of the remaining some hydroxyl groups, are substituted with groups that are not radically reactive. .n n n The lithium battery including the electrolyte is excellent in charge and discharge characteristics, life characteristics, high temperature capacity recovery rate and swelling characteristics. |