▎ 摘　　要

NOVELTY - Preparing crumpled graphene-carbon nanotube composite involves mixing acid-treated carbon nanotubes, graphene oxide and a solvent in weight ratio of 1-0.05-0.1:1 to obtain colloid mixed solution which is spray dried. The crumpled graphene-carbon nanotube composite comprises 1-0.10 wt.% of graphene oxide. USE - Method for preparing crumpled graphene-carbon nanotube composite used in supercapacitor (claimed). ADVANTAGE - The method enables to prepare crumpled graphene-carbon nanotube composite in safe and ecofriendly manner. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a supercapacitor which comprises electrode disposed opposite to each other and including an active material comprising graphene-carbon nanotube composite, electrolyte disposed between the pair of electrodes and a separator provided between the pair of electrodes and suppressing electrical short-circuiting.