▎ 摘　　要

NOVELTY - Lithium-ion hybrid supercapacitor comprises an electrode comprising nitrogen-doped carbon nanotubes (N-CNTs), and an electrode comprising an electrically conductive graphene material. USE - The supercapacitor is useful for rechargeable batteries and powering devices. ADVANTAGE - The supercapacitor: utilizes nitrogen doping that improve electrochemical properties of nanotubes due to stronger nitrogen-lithium interaction; utilizes N-CNTs beneficially increase electrode surface area in favor of stronger pseudo-capacitance without compromising electrical conductivity of carbon nanotubes; utilizes that shows improved electrochemical properties i.e. high reversible capacity, excellent rate capability and long-term cycle-life; and utilizes electrically conductive graphene material sheets enables a low diffusion resistance, thus contributing to enhanced power and energy density.