Electrolyte for double-layer capacitor and double-layer capacitor

A technology of electric double-layer capacitors and electrolytes, applied in the field of electrochemistry, can solve the problems of large influence on various performances, poor low-temperature performance, and small discharge current, and achieve high operating voltage, increase electrostatic capacity, and improve operating voltage.

Inactive Publication Date: 2015-01-28
JIANGSU GUOTAI SUPER POWER NEW MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the mature commercial electrolyte of electric double layer capacitor adopts TEA·BF 4 (tetraethylammonium tetrafluoroborate) and TEMA·BF 4 (Methyltriethylammonium tetrafluoroborate) as the electrolyte and acetonitrile as the solvent, in the ever-changing application fields of new energy vehicles and subway trains, it has low working voltage (not exceeding 2.7V), small discharge current, and poor low-temperature performance , poor safety and other shortcomings, according to the capacitor related formula E=CV 2 /2, P=V 2 /R (E, C, V, P, R res

Method used

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  • Electrolyte for double-layer capacitor and double-layer capacitor
  • Electrolyte for double-layer capacitor and double-layer capacitor
  • Electrolyte for double-layer capacitor and double-layer capacitor

Examples

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[0030] The present invention will be described in detail below in conjunction with specific embodiments:

[0031] The present invention lists the composition of the electrolytes of 2 comparative examples and 10 examples. See Table 1 for details. Then, the comparative example and the electrolyte of the example were made into 2 button-type supercapacitors, and various electrical performance indexes were tested. See Table 2 for specific data.

[0032] Table 1

[0033]

[0034]

[0035]

[0036] Table 2

[0037]

[0038] The above data shows that the electric performance index of the electrolyte of the electric double layer capacitor of the present invention is still better than that of the existing commercial electric double layer capacitor electrolyte.

[0039] The above-mentioned embodiments are only to illustrate the technical concept and features of the present invention, and their purpose is to enable those familiar with the technology to understand the content of the present inventi...

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Abstract

The invention relates to an electrolyte for a double-layer capacitor. The electrolyte for the double-layer capacitor comprises an electrolyte body and organic solvent, and the organic solvent is mixed solvent of nitrile organic solvent and other organic solvent. According to the electrolyte for the double-layer capacitor, a fluorine-containing kation electrolyte is adopted, and other organic solvent is fluorine-containing organic solvent; the electrolyte body is matched with the organic solvent, and accordingly the electrolyte is good in long-time reliability and high in working voltage; by the adoption of the electrolyte, the working voltage of the double-layer capacitor can be improved, the electrostatic capacity, the power density and the energy density of the double-layer capacitor are increased, the safety performance can be improved, and thus the electrochemical performance requirement of the double-layer capacitor can be met.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to an electrolyte solution for double-layer capacitors. Background technique [0002] Electric double layer capacitor, also known as super capacitor, is a brand new capacitor based on the theory of interface electric double layer proposed by German physicist Helmholtz. When the electrode is charged, the surface charge of the electrode in the ideal polarized electrode state will attract the opposite ions in the surrounding electrolyte solution, so that these ions will attach to the electrode surface to form an electric double layer, forming an electric double layer capacitance. Because the distance between the two charge layers is very small (generally less than 0.5nm, far smaller than that of ordinary capacitors), and the special electrode structure is used, the surface area of ​​the electrode is increased by tens of thousands of times, so that a huge capacitanc...

Claims

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Application Information

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IPC IPC(8): H01G11/60H01G11/62
CPCY02E60/13H01G11/60H01G11/62
Inventor 熊鲲伍广田徐晓强郭军关士友李建中
Owner JIANGSU GUOTAI SUPER POWER NEW MATERIALS
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