LITHIUM-SULFUR SECONDARY BATTERY HAVING ELECTRODE WHICH IS CONSTRUCTED WITH GRAPHENE COMPOSITE INCLUDING SULFUR AND A FORMING METHOD THEREOF

摘要

PURPOSE: A manufacturing method of an electrode is provided to improve the conductivity of a sulfur electrode by using graphene including sulfur as a structure body, to reduce cell resistance, and to obtain the structural stability of the electrode. CONSTITUTION: A manufacturing method of an electrode comprises a step of arranging graphene; a step of forming pores on the surface of the graphene by hydrofluoric acid-treating the graphene; and a step of synthesizing a graphene composite including sulfur particles by growing sulfur particle in the formed pores. A secondary battery comprises a positive electrode (100) having a positive active material, which is a graphene composite including graphene with pores on the surface thereof and the grown sulfur particles in the pores; a negative electrode (200); and a separator (300) formed between the positive electrode and the negative electrode.