Method for improving energy storage density of electrochemical capacitor

Abstract

The invention discloses a method for improving the energy storage density of an electrochemical capacitor, and belongs to the technical field of electrochemical capacitors. By changing the structure and the charging method of an existing electrochemical capacitor, the energy storage density of the electrochemical capacitor is improved by multiple times. The technical key points are as follows: a positive charging plate and a negative charging plate are added to the electrolyte of a capacitor, a positive charging power supply is connected with a positive current collector of the capacitor and the positive charging plate, and a negative charging power supply is connected with a negative current collector of the capacitor and the negative charging plate; the positive charging power supply charges an electric double-layer capacitor formed by a positive electrode material interface and a solution side interface; the negative charging power supply charges an electric double-layer capacitor formed by a negative electrode material interface and the solution side interface; or a positive branch, a negative branch and a positive-negative branch are charged simultaneously; and during discharging, electric energy is released to a load through a positive terminal port and a negative terminal port of the capacitor. The method is mainly used in electric automobile power, energy storage of wind / solar power stations, uninterrupted power supplies (UPS) and various equipment power supplies.

Description

technical field [0001] The invention belongs to the technical field of electrochemical capacitors. Background technique [0002] According to the electrode material and energy storage mechanism, electrochemical capacitors can be divided into: carbon-based electric double layer electrochemical capacitors; metal oxides, hydroxides, conductive polymer pseudocapacitors; There are three types of hybrid capacitors composed of pseudocapacitors. [0003] Because the charging and discharging process of the electric double layer electrochemical capacitor is a physical process, the electrode has no chemical reaction, its performance is stable, safe and reliable, it can charge and discharge rapidly with a large current, and it has a long service life. Methods to increase the energy storage density of electrochemical capacitors are described. [0004] Utilizing the capacitance structure and charging method of the present invention, pseudocapacitors can be manufactured as long as the co...

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Problems solved by technology

[0009] (Another kind of existing technology is: use single-layer carbon nanotube non-woven fabric directly as electrode, it does not have metal current collector, as the capacitor invented by Xie Sishen et al., Chinese Academy of Sciences)

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