▎ 摘　　要

NOVELTY - The method involves mixing graphene oxide powder with dispersed suspension liquid, where graphene oxide powder is nanometer powder or micron powder. Atomizing drying process is executed on a precursor unit. Protection gas is passed through the precursor unit, where heating temperature of the precursor unit is 200 to 1100 degrees Celsius. A speed reducer is provided with reaction material. Hollow graphene is mixed with separate solid substance. USE - Hollow graphene preparation method for lithium-air battery. ADVANTAGE - The method enables simplifying operation, providing better environment-friendly condition, increasing productivity, reducing cost and improving electrochemical property level. DETAILED DESCRIPTION - Graphene oxide powder is mixed with hydroxide and polymer materials, where hydroxide and polymer materials are selected from sulfur, calcium, magnesium, aluminum, manganese, zinc, iron, cobalt, tin, chromium, gallium lead material. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view illustrating a hollow graphene preparation method.