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Electrolyte solute, electrolyte and high-voltage supercapacitor

A supercapacitor and electrolyte technology, applied in the field of electrochemistry, can solve problems such as the deterioration of the electrochemical performance of capacitors, achieve high power density, prolong working life, and improve energy density.

Active Publication Date: 2014-11-05
BASF BATTERY MATERIALS SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese invention patent with publication number CN101809693A mentions that in the traditional Et 4 NBF 4 Acetonitrile (AN) solution is added with various acid scavenger to slow down the rate of pressure increase in the capacitor, so as to achieve the purpose of increasing the working voltage of the supercapacitor. With the extension of life, the electrochemical performance of the capacitor is obviously deteriorated, and its life characteristics need to be significantly improved

Method used

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  • Electrolyte solute, electrolyte and high-voltage supercapacitor
  • Electrolyte solute, electrolyte and high-voltage supercapacitor
  • Electrolyte solute, electrolyte and high-voltage supercapacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] N-methyl-1,4-diazabicyclo[2.2.2]octane ammonium tetrafluoroborate (MDACOBF 4 ) is the solute, AN is the solvent, prepare a 1.0mol / L electrolyte, and measure its conductivity at 25°C, and adjust the solute, solvent and concentration of the electrolyte, as shown in the following examples and comparative examples , and the conductivity results are listed in Table 1. The electrolyte of this embodiment was used to make a supercapacitor and its electrochemical performance was tested. The life test results are listed in Table 2.

Embodiment 2-12

[0043] Consistent with the conditions of Example 1, the solute, solvent and concentration of the electrolyte were adjusted, and the detailed data are shown in Table 2-5. Wherein the chemical structural formula of each solute is as follows:

[0044]

[0045]

[0046] Supercapacitors were manufactured with the electrolytes of the above embodiments and electrochemical performance tests were performed on them. The life test results are listed in Table 2-Table 5 respectively.

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Abstract

The invention relates to the field of electrochemistry, in particular to an electrolyte solute for a high-voltage supercapacitor, an electrolyte and the high-voltage supercapacitor applying the electrolyte. Anion of the electrolyte solute can be selected from one or more of tetrafluoroborate, hexafluorophosphate, bis(trifluoroMethylsulfonyl)imino, bis(trifluoroMethylsulfonyl)methyl and perfluoro alkyl sulfonic acid, and cation can be selected from one or more of N-methyl-1,4-diazabicyclo[2.2.2] ammonium octane, N,N-dimethyl-1,4-diazabicycle[2.2.2] ammonium octane and N-methyl-1-diazabicyclo[2.2.2] ammonium octane. The high-voltage supercapacitor made of the electrolyte which is prepared from the electrolyte solute can stably work for a long time at voltages of 2.7 to 3.2V, energy density is greatly improved, the characteristic of high power density of the high-voltage supercapacitor is kept, and the service life of the high-voltage supercapacitor is prolonged.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to an electrolyte solute and an electrolyte used for a high-voltage supercapacitor and a high-voltage supercapacitor using the electrolyte. Background technique [0002] Supercapacitors, also known as gold capacitors or electrochemical capacitors, store energy using ion adsorption (electric double layer capacitors) or rapid surface redox reactions (pseudocapacitors). A supercapacitor is a new type of energy storage device between batteries and traditional electrostatic capacitors. The charge stored in a supercapacitor is hundreds or thousands of times that of a traditional electrolytic capacitor, it can be fully charged and discharged within seconds, it has a higher power input or output than a battery, and it can be achieved in a shorter time. At the same time, supercapacitors have the advantages of short charge and discharge time, long storage life, high stability, and wide operat...

Claims

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Application Information

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IPC IPC(8): H01G11/62
CPCY02E60/13
Inventor 郑仲天曹英杰曹朝伟薛龙良向晓霞
Owner BASF BATTERY MATERIALS SUZHOU
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