Importance

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Abstract

The present invention aims to provide an additive for a non-aqueous electrolyte solution which has excellent storage stability and which, when used in an electrical storage device, can form a stable SEI on the surface of an electrode to improve battery characteristics such as the cycle characteristics, the charge/discharge capacity, the high-temperature storage characteristics, suppression of gas generation, and reduction in the internal resistance. The present invention also aims to provide a non-aqueous electrolyte solution containing the additive for a non-aqueous electrolyte solution and an electrical storage device containing the non-aqueous electrolyte solution. The present invention relates to an additive for a non-aqueous electrolyte solution, the additive containing a cyclic imide compound represented by Formula (1-1), Formula (1-2), Formula (1-3), Formula (1-4), Formula (1-5), or Formula (1-6). R¹ in Formula (1-1), R³ in Formula (1-2), R⁵ in Formula (1-3), R⁷ in Formula (1-4), R⁹ in Formula (1-5), and R¹¹ in Formula (1-6) each independently represent a substituted or unsubstituted C1-C4 alkyl group, a substituted or unsubstituted C2-C4 alkenyl group, a substituted or unsubstituted C1-C4 alkoxy group, a substituted or unsubstituted phenyl group, a substituted or unsubstituted phenoxy group, a substituted or unsubstituted benzyl group, a substituted or unsubstituted benzyloxy group, a substituted or unsubstituted C2-C6 alkenyloxy group, or a NR¹³R¹⁴ group, R¹³ and R¹⁴ each independently representing a hydrogen atom, a substituted or unsubstituted C1-C4 alkyl group, a substituted or unsubstituted C2-C4 alkenyl group, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted benzyl group; R² in Formula (1-1), R⁴ in Formula (1-2), R⁶ in Formula (1-3), R⁸ in Formula (1-4), R¹⁰ in Formula (1-5), and R¹² in Formula (1-6) each independently represent a substituted or unsubstituted C1-C4 alkyl group, a substituted or unsubstituted C1-C4 alkoxy group, or a halogen atom; 1 in Formula (1-1) represents an integer of 0 to 4; m in Formula (1-2) represents an integer of 0 to 2; n in Formula (1-3) represents an integer of 0 to 2; o in Formula (1-4) represents an integer of 0 to 4; p in Formula (1-5) represents an integer of 0 to 4; and q in Formula (1-6) represents an integer of 0 to 6.

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First Claim