▎ 摘　　要

NOVELTY - An integrated energy storage device (1) comprises a battery surrounding a supercapacitor (3), such that the battery forms a shell (7) around an exterior surface of the supercapacitor. The battery comprises an electrolyte disposed between a first anode and a first cathode. The supercapacitor has a separator disposed between a second anode and a second cathode. At least one of the second anode and the second cathode, comprise layer(s) of a composite material containing graphene and metal oxide. The integrated energy storage device alternately comprises supercapacitor surrounding the battery such that the supercapacitor forms shell around exterior surface of the battery. USE - Integrated energy storage device is used in energy pack of vehicles, i.e. electric powered vehicle or hybrid vehicles. ADVANTAGE - The energy storage device combines the durability benefits of battery with the instant energy provided by supercapacitor into a single integrated energy storage device, to provide enhanced power at a lower cost, than current power batteries. Furthermore, by forming the supercapacitor using composite material comprising graphene and metal oxide, undesirable graphite formation is prevented in the integrated energy storage devices. The integrated energy storage devices having a hexagonal shape, when used in energy pack of vehicles, prevents formation of undesirable gaps or voids, thus allowing the energy pack to hold more energy storage devices. The device provides increased power and improved durability, at lower cost to the energy packs. When several integrated energy storage devices are used together in energy pack to power E-powered vehicles or other hybrid vehicles, the device provides five times the power of current power batteries, with a cost that is one and a half times lower than current power batteries. DESCRIPTION OF DRAWING(S) - The drawing shows perspective view of integrated supercapacitor-battery structure 1Integrated energy storage device 3Supercapacitor 4Electrode layers 6Insulator 7Shell