▎ 摘　　要

NOVELTY - Negative active material composition, comprises: 70-99 wt.% negative active materials; 1-10 wt.% at least one binder; optionally up to 10 wt.% in total of conductive additive; and optionally less than 10 wt.% in total of other components or impurities, where the negative material consists of niobium oxide particles and microporous carbon (MC) particles. The MC particles have a Brunauer-Emmett-Teller nitrogen surface area of at least 60 m2/g, preferably at least 1000 m2/g. The conductive additive comprises carbon black, carbon nanotubes and/or graphene. USE - The composition is useful for negative electrode of energy storage cell (claimed) i.e. hybrid supercapacitor. ADVANTAGE - The composition improves supercapacitors with respect to their electrical properties, preferably the actually usable capacity or charge/discharge speed. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: manufacturing the negative electrode for energy storage cell; a positive active material composition for positive electrode of energy storage cell; manufacturing positive electrode for energy storage cell, comprising mixing 0.5-10 wt.% carbon black, 6-98.5 wt.% positive active material that consists of lithium manganese(III,IV) oxide particles, optionally 0.1-2 wt.% carbon nanotubes and optionally 0.1-2 wt.% graphene; and an energy storage cell for storing electrical energy. DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of energy storage cell. 1Energy storage cell 2First electrode arrangement 3Second electrode arrangement 4Organic electrolyte 5Separator