▎ 摘　　要

NOVELTY - A lithium ion capacitor (100) comprises a cathode (110), an anode (120) provided at a distance from the cathode, and a lithium ion electrolyte (130) filling the space between the cathode and the anode. The cathode is made of a composite of graphene (140) and carbon nanotubes (150). The anode is made of a composite of lithium-doped graphene and carbon nanotubes. The mass ratio of the anode to the cathode is more than 0 and less than 1. USE - Lithium ion capacitor. ADVANTAGE - The lithium ion capacitor has high specific capacitance and high energy density. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the lithium ion capacitor. Lithium ion capacitor (100) Cathode (110) Anode (120) Lithium ionic electrolyte (130) Graphene (140) Carbon nanotube (150)