Electrolyte for double-layer capacitor and preparation method

A double-layer capacitor and electrolyte technology, applied in the manufacture of hybrid/electric double-layer capacitors, hybrid capacitor electrolytes, etc., can solve the problems of large equivalent internal resistance and low affinity of electric double-layer capacitors, and shorten the liquid injection Time, less capillary phenomenon, and the effect of reducing the equivalent internal resistance

Inactive Publication Date: 2013-12-04
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because of the wide voltage window, piperidine-based ionic liquids are one of the more promising ionic liquid electrolytes. However, piperidine-based ionic liquids have low affinity with commonly used diaphragm materials such as PP and PE, so that pure piperidine-based ionic liquids The equivalent internal resistance of the electric double layer capacitor with ionic liquid as the electrolyte is too large

Method used

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

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0021] In the glove box (that is, in the absence of oxygen and water and protected by inert gas), mix methyl ethyl piperidine tetrafluoroborate and undecanoate glyceride with a mass ratio of 1:0.04, and stir for 60 Minutes later, the glyceryl undecanoate was uniformly dispersed in methyl ethyl piperidine tetrafluoroborate to obtain an electrolyte for electric double layer capacitors.

[0022] The parameters of Examples 2 to 20 are different from those of Example 1, but the preparation method steps and test conditions are the same as those of Example 1, see Table 1 below.

[0023] Table 1

[0024]

[0025]

[0026] Note: In the table, the reduction ratio of the equivalent internal resistance is the equivalent internal resistance ratio of the electric double-layer capacitor using the electrolyte of this embodiment in the corresponding example, measured under the same conditions, using no fatty acid polyol ester added The percentage reduction of the equivalent internal resistance of th...

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Abstract

The invention discloses an electrolyte for a double-layer capacitor. The electrolyte for the double-layer capacitor contains piperidine ionic liquid and polyhydroxy alcohol fatty acid ester, wherein the mass ratio of the piperidine ionic liquid to the polyhydroxy alcohol fatty acid ester is 1:0.001 to 1:0.05. The invention further discloses a preparation method of the electrolyte for the double-layer capacitor. The injection time is short, and the equivalent internal resistance of the double-layer capacitor can be greatly reduced.

Description

Technical field [0001] The invention relates to an electrolyte and a preparation method thereof, in particular to an electrolyte for double-layer capacitors and a preparation method thereof. Background technique [0002] Double-layer capacitors are 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 the military field, 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 electric storage performance of the electric double layer capacitor, which determines the equivalent internal resistance of the capacitor, the operating voltage range, the storage capacity, the operating temperature and the working environment. [0003] Ionic liquids are organic liquid substances that are completely composed of ions at or near room temperature. ...

Claims

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Application Information

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IPC IPC(8): H01G11/64H01G11/84
CPCY02E60/13
Inventor 周明杰邓惠仁王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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