▎ 摘　　要

NOVELTY - The energy storage cell (1) has a negative electrode (22) and a positive electrode (32) that are immersed in an organic electrolyte (4). The negative electrode includes a negative active material composition that has Nb20s particles and microporous carbon (MC) particles. The positive electrode includes a positive active material composition that for the most portion has LiMn2C (LMO) particles. The negative active material composition includes a negative active material that consists of Nb20s particles, MC particles and unavoidable impurities. The negative electrode composition and/or the positive electrode composition include at least one conductive additive. The conductive additive is selected from a group consisting of carbon black (CB), carbon nanotubes (CNTs), graphene and mixtures. USE - Energy storage cell e.g. hybrid supercapacitor for storing electrical energy. Uses include but are not limited to automobiles, industrial applications, mass transport, or grid regulation. ADVANTAGE - The energy storage cell has fast charge and discharge capabilites, and fast charging or discharging, or in other words, a high peak power. The addition of either graphene or carbon nanotubes (CNT) improves the available gravimetric capacity for gravimetric currents below 400 mA/g. An overall improvement of the electrical properties is achieved for a wide range of applications. The cell allows for a significant improvement of energy storage cells, such as hybrid ultracapacitors. DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of an energy storage cell. 1Energy storage cell 4Organic electrolyte 21Anode terminal 22Negative electrode 32Positive electrode