▎ 摘　　要

NOVELTY - Metal/organic carbon nanocomposite comprises graphene and sulfur as active ingredients and complex in which a first zeolitic imidazolate framework (ZIF) and second ZIF exist in a core-shell form. USE - Metal/organic carbon nanocomposite used for lithium-sulfur battery (claimed). ADVANTAGE - The metal/organic carbon nanocomposite has high charge/discharge capacity by each containing cobalt and zinc having similar crystal forms, and exhibit excellent cycle stability and rate-limiting characteristics. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for producing a metal/organic carbon nanocomposite which involves (S1) preparing a first ZIF by reacting cobalt and organic ligand, and preparing a first ZIF/graphene oxide by mixing with graphene oxide; (S2) preparing a second ZIF by reacting zinc and organic ligand, and mixing the graphene oxide/first ZIF to prepare a first ZIF/second ZIF/graphene oxide; (S3) preparing the first ZIF/second ZIF/graphene by heat-treating the first ZIF/second ZIF/graphene oxide; and (S4) preparing a metal/organic carbon nanocomposite composed of first ZIF/second ZIF/graphene/sulfur by adding a sulfur material.