▎ 摘　　要

NOVELTY - The method for preparing hollow porous cobalt oxide nano-box/reduced graphene oxide composite material involves dissolving 0.747-2.988 g cobalt nitrate hexahydrate in 60 ml methanol to form pink clear solution, then adding 0.164-0.656 g 2-methylimidazole, leaving still at 25 degrees C for 24 hours, and washing obtained product with methanol to obtain product, placing prepared cobalt-based metal organic framework ZIF-67 powder in a tube heating furnace, heating at heating rate of 5 degrees C/minute to 300-500 degrees C for 1-3 hours to obtain hollow porous cobalt oxide nano-box, dispersing 10-30 mg graphene oxide in 100 ml deionized water and processing for 2 hours, dispersing 50-150 mg hollow porous cobalt oxide nano-box in 100 ml deionized water, processing for 15 minutes and uniformly dispersing for 15 minutes, placing the mixture in 45 ml stainless steel autoclave, carrying out hydrothermal reaction at 180 degrees C for 1-3 hours, and collecting black powder. USE - The method is useful for preparing hollow porous cobalt oxide nano-box/reduced graphene oxide composite material, which is used as cathode for lithium ion battery (claimed). ADVANTAGE - The method enables simple preparation of hollow porous cobalt oxide nano-box/reduced graphene oxide composite material with high capacity and excellent rate performance and cycle stability.