Provided is a secondary battery that includes an electrode active material including an organic compound represented by the following General Formula 1. Ar—(OH)n   In the General Formula 1, Ar denotes at least one selected from the group consisting of 1,1-binaphthalene, anthracene, triphenylene, tetraphenylene, and pyrene, and is optionally substituted with a substituent. The substituent of Ar is at least one selected from the group consisting of an OH group, a carbonyl group produced through oxidization of the OH group, an alkyl group containing 3 or less carbon atoms, a halogen atom, and an amino group. n denotes an integer in a range of from 2 through 8.