▎ 摘　　要

NOVELTY - Preparing three-dimensional graphene comprises (i) pre-treating large grid resin is mixed with a metal ion saline solution, mixing, resin that adsorbs metal ions; (ii) resin for adsorbing the metal ions is pulverized, adding a transitional cavity filler, and well mixed; (iii) adding the product obtained in step (ii) to the pore forming agent solution, stir and dry; (iv) subjecting the product obtained in step (iii) to a heat treatment in an inert gas atmosphere; and (v) product obtained in step (iv) is subjected to pickling, filter, and drying. USE - The method is useful for preparing three-dimensional graphene (claimed). ADVANTAGE - The method produces product having multi-layer open-hole self-supporting structure having various pore structure and distribution adjustable, few layers, large specific surface area, high porosity, high conductivity, low density, and easy to stack. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for three-dimensional structure graphene prepared as mentioned above.