▎ 摘　　要

NOVELTY - Copper-based composite powder comprises 0.001-0.1 wt.% graphene or graphene oxide, 0.1-30 wt.% copper oxide, 0.1-30 wt.% cuprous oxide and copper (balance amount). USE - The copper-based composite powder is useful for battery and electrode (claimed) including lithium battery and sensor electrode. ADVANTAGE - The copper-based composite powder has high specific surface area and storage. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing copper-based composite powder comprising (i) preparing 0.001-0.1 wt.% aqueous graphene or graphene oxide solution, (ii) adding basic substance into product obtained in step (i) to obtain oxidation base solution, (iii) adding copper salt solution into product obtained in step (ii), (iv) adding 0.1-0.2 wt.% corrosion inhibitor into product obtained in step (iii), (v) adding reducing agent into product obtained in step (iv) to obtain reaction stock solution, (iv) adding water into product obtained in step (v) to carry out the corrosion treatment to obtain the final solution, (vi) separating the solid and liquid of the above final solution to obtain powder, and (viii) carrying out heat treatment of the powder in a reducing or oxidizing atmosphere to obtain final product.