▎ 摘　　要

NOVELTY - NiCo alloy doped nitrogen-doped graphene-stage hole gas gel preparation comprises (1) adding graphene dispersion liquid into the Tris-HCl buffer solution, adding nitrogen source, nickel source and cobalt source, stirring, ultrasonic processing to obtain the mixed solution, performing hydrothermal reaction, finishing reaction, cooling to room temperature, washing, freezing dry the pre-product, (2) under the reducing atmosphere, the pre-product for heat treatment, washing, vacuum dry to obtain NiCo alloy doped nitrogen-doped graphene-stage hole gas gel USE - The nitrogen-doped graphene-stage porous gas gel is used for zinc-air battery positive electrode material. ADVANTAGE - The NiCo alloy doped nitrogen-doped graphene-stage porous gas with gel hole structure has excellent ORR catalytic performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for nitrogen-doped graphene-stage porous gas gel prepared by above method.