ADDITIVE FOR NON-AQUEOUS ELECTROLYTE AND SECONDARY BATTERY USING THE SAME

摘要

Disclosed is a compound represented by the formula 1 : wherein, each of R¹ ~R¹³ independently represents -H, -F, -Cl, -Br, -I, -OH, -SH, -COOH, -PO₃ H₂ , -NH₂ , -NO₂ , -O(CH₂ CH₂ O)_n H (wherein, n is an integer of 1-5), C₁ ~C₁₂ alkyl group, C₁~C₁₂ aminoalkyl group, C₁~C₁₂ hydroxyalkyl group, C₁~C₁₂ haloalkyl group, C₂ ~C₁₂ alkenyl group, C₁ ~C₁₂ alkoxy group, C₁~C₁₂ alkylamino group, C₁~C₁₂ dialkylamino group, C₆~C₁₈ aryl group, C₆ ~C₁₈ aminoaryl group, C₆~C₁₈ hydroxyaryl group, C₆~C₁₈ haloaryl group, C₇~C₁₈ benzyl group, C₇ ~C₁₈ aminobenzyl group, C₇~C₁₈ hydroxybenzyl group, C₇~C₁₈ halobenzyl group, or nitrile group (-CN); and at least one of R₄~R₁₃ is nitrile group (-CN). A non-aqueous electrolyte comprising: (i) a lithium salt, (ii) a solvent, and (iii) a compound represented by formula 1 ; and a secondary battery comprising the non-aqueous electrolyte are also disclosed. When the compound represented by formula 1 is added to a non-aqueous electrolyte, it is possible to improve the safety of a secondary battery in an overcharged state.