A hybrid capacitor battery

Abstract

The invention relates to a new energy storage device and specifically to a hybrid capacitor battery. The hybrid capacitor battery comprises a positive plate, a negative plate, a diaphragm, and electrolyte. The positive plate, the negative plate, and the diaphragm are immersed in the electrolyte. The positive plate comprises a corrosion aluminum foil and a positive material coating both sides of the aluminum foil. The positive material comprises a positive active material, a binder, and a conductive agent. The positive active material is a composite material formed by a ternary material and active carbon. The negative plate comprises a corrosion aluminum foil or copper foil, and a negative material coating both sides of the aluminum foil or copper foil. The negative material comprises a negative active material, a binder, and a conductive agent. The negative active material is one or more selected from a group including synthetic graphite, active carbon, soft carbon, and hard carbon. The hybrid capacitor battery has high rate capability, capability, and cycling stability, and a wide voltage range, can be charged and discharged within a voltage interval from 2.5 to 4.5V, has the high-energy-density characteristic of a lithium ion battery and the high-power-density characteristic of a double electric layer capacitor, and is low in production cost.

Description

technical field [0001] The invention relates to a new energy storage device, in particular to a hybrid capacitor battery. Background technique [0002] At present, supercapacitors and lithium-ion batteries are commonly used for energy storage. Supercapacitors have the characteristics of high specific power and ultra-high cycle life, but low energy density. Although lithium-ion batteries have high energy density, they have short cycle life and low power density. Therefore, the development of hybrid energy storage devices with high energy density and high power characteristics has become an urgent problem. [0003] All countries in the world have formulated short-term goals and development plans, and listed hybrid capacitor batteries as key research objects. Developed countries such as Russia, the United States and Japan have invested a lot of money in the research and development of hybrid capacitor batteries. In China, hybrid capacitor batteries are also developing rapidly...

AI Technical Summary

Problems solved by technology

The voltage platform of this type of electrochemical capacitor is low. Although the specific energy has been greatly improved compared with the electric double layer capacitor, it is still difficult to meet the needs of fast charging and discharging and long-term use in green new energy fields such as electric passenger vehicles.