- - Preparation method of N-doped graphene preparation method of Sulfur-graphene composite and anode of Lithium-Sulfur battery comprising the same

摘要

Dispersion containing graphite passes through the inlet and outlet and the microchannel of the High Pressure Homogenizer (HPH) including a microchannel having a diameter of micrometers, which connects between the inlet and the outlet and the outlet A first step of obtaining a graphene flake by peeling the graphite through a high pressure homogenizing to; Filtering and drying the obtained graphene flakes, and then putting the ammonium compound into a ball mill and performing dry ball milling under an inert atmosphere to obtain particles in which the ammonium compound is surrounded on the surface of the graphene flakes; And a third step of thermally treating the obtained particles to obtain graphene doped with nitrogen atoms; a method for preparing nitrogen-doped graphene, a method for preparing a sulfur-graphene composite using the same, comprising the sulfur-graphene composite A lithium sulfur battery positive electrode, and a lithium sulfur battery including the positive electrode are provided.