A capacitor electrolyte and a capacitor using the same

Abstract

The invention belongs to the field of electrochemistry and discloses an electrolyte for a capacitor and the capacitor using the electrolyte. The electrolyte comprises ionic liquid and nano-silver particles in a mass ratio of (1:0.001)-(1:0.01). The electrolyte has the following beneficial effects that the electrolyte is prepared through the mixture and reaction of the ionic liquid and the nano-silver particles; and after the ionic liquid and the nano-silver particles are mixed, the internal resistance of the electrolyte is reduced in the presence of silver ions, and the silver ions are partially reduced to silver simple substances in the charge-discharge process and the silver simple substances are relatively stable and can uniformly attach to the gaps of electrode materials to reduce the internal resistance of the electrode materials, thus greatly reducing the equivalent internal resistance of the electrical double layer capacitor.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to a capacitor electrolyte. The invention also relates to a capacitor using the electrolytic solution. Background technique [0002] Electric double layer capacitor is a new type of energy storage device, which has the advantages of high power density, high cycle life, and fast charge and discharge performance. It is widely used in military fields, mobile communication devices, computers, and hybrid power supplies for electric vehicles. As an important part of the electric double layer capacitor, the electrolyte has a great influence on the storage performance of the electric double layer capacitor, which determines the working voltage range, storage capacity, working temperature and working environment of the capacitor. [0003] Ionic liquids are organic liquid substances composed entirely of ions at or near room temperature. As a new type of electrolyte, the emergence of ionic li...

AI Technical Summary

Problems solved by technology

Ionic liquids have good development prospects as the electrolyte of electric double layer capacitors, however, the capacitance of pure ionic liquids at room temperature is not high

The purpose of increasing the capacitance is achieved by adding organic solvents (acetonitrile, propylene carbonate, 1-butyrolactone), but the risk factor of flammability and explosion is increased during the use of the capacitor.

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