The carbazole compound added to the electrolyte for a lithium ion battery and

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PROBLEM TO BE SOLVED : To provide a novel carbazole compound, and a lithium ion battery with an overcharge prevention effect containing the same.SOLUTION : The carbazole compound is represented by general formula (1). (In the formula, Rrepresents a C1-6 fluoroalkyl group or an aromatic hydrocarbon group, where the aromatic hydrocarbon group has three or more substituents selected from fluorine atoms, C1-4 fluoroalkyl groups and C1-4 fluoroalkoxy groups; and Rare identical or different and each represent a C1-6 alkyl group, a C1-6 acyl group or a C1-4 alkoxy group.)