▎ 摘　　要

NOVELTY - Preparing graphene nanoscroll-based electrode material comprises (i) mixing graphene oxide and nano-carbon material in a solvent in a certain mass ratio to prepare a dispersion liquid, (ii) directly spraying the dispersion solution into liquid nitrogen, quickly freezing the liquid drop with a preset diameter into powder, freezing and drying to obtain a precursor, and (iii) pressing the precursor into a sheet, and self-propagating combustion to obtain the graphene nanosheet electrode material. USE - Preparation method of graphene nanoscroll-based electrode material used for positive electrode or cathode of lithium-ion capacitor e.g. hybrid super capacitor. ADVANTAGE - The method provides graphene nano electrode material with high electrical conductivity, high specific area and unique two-dimensional structure, and excellent capacity characteristics, cycling performance and super-high rate performance. The method has simple techniques, convenient operation, does not need additional equipment, which is beneficial to realize mass production, and provides lithium-ion capacitor with excellent performance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a graphene nanoscroll-based electrode material; (2) a lithium ion capacitor.