▎ 摘　　要

NOVELTY - Dianion-cobalt-selenium sulfide based composite material for preparing negative electrode material of battery, comprises cobalt-selenide-sulfur-reduced graphene oxide composite. USE - Dianion-cobalt-selenium sulfide based composite material for preparing negative electrode material of battery. ADVANTAGE - The dianion-cobalt-selenium sulfide based composite material improves electrical conductivity and cycle stability of negative electrode material. DETAILED DESCRIPTION - A dianion-cobalt-selenium sulfide based composite material comprises cobalt-selenide-sulfur-reduced graphene oxide composite (Co(0.85)Se1-xSx-rGO), where x is 0-0.5. An INDEPENDENT CLAIM is also included for a method for preparing the dianion-cobalt-selenium sulfide based composite material.