Electrolyte for super capacitor and super capacitor

A supercapacitor and electrolyte technology, applied in the field of electrochemistry, can solve the problems affecting the performance of capacitors, low solubility, low electrolyte, etc., and achieve the effects of reducing production cost and use cost, simple preparation process, and slow capacity decay
CN101840784AInactive Publication Date: 2010-09-22CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Publication Date
2010-09-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides an electrolyte for a super capacitor. In the electrolyte, a solvent is water, and a solute is 2 to 6M sodium perchlorate. The invention also provides the super capacitor, which comprises an anode, a cathode, a diaphragm between the anode and the cathode, and the electrolyte, wherein the electrolyte is 2 to 6M aqueous solution of sodium perchlorate. The aqueous solution of sodium perchlorate with high concentration has high ionic conductivity, the sodium perchlorate is difficult to separate out at a low temperature, and the aqueous solution of sodium perchlorate has low freezing point and can adapt to a low-temperature work environment; and the aqueous solution of sodium perchlorate has wide electrochemical window and good electrochemical properties at the same time. The super capacitor provided by the invention has high ionic conductivity, the capacity is slowly attenuated during charge and discharge, and the energy density and power density are high; and in addition, the electrolyte and the super capacitor provided by the invention have the advantages of simple preparation process, low cost of raw materials, convenient operation and reduction in production cost and using cost.
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Description

technical field

[0001] The invention relates to the technical field of electrochemistry, in particular to an electrolyte solution for a supercapacitor and the supercapacitor. Background technique

[0002] A supercapacitor is an electrochemical element that stores energy through a polarized electrolyte. It has the advantages of high discharge specific power, excellent instantaneous charge and discharge performance, and long cycle life. It can be used as a pollution-free backup power supply for a variety of electrical equipment. It can also form a composite power supply together with the battery to provide power for electric vehicles.

[0003] Studies have shown that the performance of supercapacitors is mainly related to the electrolyte used. For example, J.P. Zheng et al. found that the concentration of the electrolyte is closely related to the capacitance, energy density and power density of the capacitor. The higher the concentration of the electrolyte, the more ionic The...

Claims

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