▎ 摘　　要

NOVELTY - Supercapacitor-battery hybrid energy system (100) comprises a lithium-ion battery (102), and a carbon-graphene supercapacitor (104) connected to the lithium-ion battery (102), to increase efficiency of the lithium-ion battery. The carbon-graphene supercapacitor (104) comprises a first layer, a second layer, and third layer. The first layer is configured to contain a current collector of low resistance for collecting electrical charge from an active material. The second layer is configured to contain the active material to store energy in electric field. The third layer is configured to contain a separator to keep positive and negative ions separate and prevent them from coming into electrical contact with each other. The fourth layer is configured to contain the current collector of low resistance for collecting electrical charge from the active material. The fifth layer is configured to contain an electrolyte to facilitate transfer of electrical charge. USE - Supercapacitor-battery hybrid energy system used for electric vehicle. ADVANTAGE - The supercapacitor-battery hybrid energy system has better energy density, faster charging and discharging rates, and longer cycle life, improved battery performance and provide power to battery rapidly and efficiently, and has cost-effective, and has good energy density and power density to improve efficiency and safety of the electric vehicle during load condition. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a supercapacitorbattery hybrid energy system. 102Lithium-ion battery 104Carbon-graphene supercapacitor 106Switch