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Electrolyte and preparation method thereof

A preparation method and electrolyte technology, applied in the field of electrolyte, can solve the problems of reduced stability of electric double-layer capacitors, corrosion of aluminum foil, etc.

Inactive Publication Date: 2013-03-06
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the methylsulfate ionic liquid contains more inorganic acid impurities, and the inorganic acid will corrode the aluminum foil of the double-layer capacitor, resulting in the stability of the electric double-layer capacitor using the methylsulfate ionic liquid as the electrolyte. decreased sex

Method used

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  • Electrolyte and preparation method thereof
  • Electrolyte and preparation method thereof
  • Electrolyte and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0059] The alkyl silane is added into the methylsulfate ionic liquid, and stirred until dissolved to obtain an electrolyte.

[0060] In this embodiment, the alkylsilane is methyltriethylsilane, the methylsulfate ionic liquid is 1-ethyl-3-methylimidazolium methylsulfate, and the methylsulfate ionic liquid and The mass ratio of alkylsilane is 1:0.04.

[0061] In this embodiment, when preparing the electrolyte, it is carried out in a glove box, and methyltriethylsilane is added to 1-ethyl-3-methylimidazole methyl sulfate and stirred for 10 to 60 minutes to make methyltriethylsilane silane dissolved in 1-ethyl-3-methylimidazolium methylsulfate.

[0062] The above electrolytic solution was applied to a double layer capacitor and the stability of the double layer capacitor was measured.

[0063] When testing the stability, use graphene as the electrode material, use the electrolyte prepared in Example 1, assemble it into a button battery, use the CHI660A electrochemical workstatio...

Embodiment 2 18

[0066] In Examples 2 to 18, the alkylsilane is added into the methylsulfate ionic liquid, and stirred until dissolved to obtain an electrolyte. When preparing the electrolyte, it was carried out in a glove box.

[0067] In embodiments two to eighteen, the ratio of alkylsilane, methylsulfate ionic liquid, methylsulfate ionic liquid and alkylsilane, stirring time, specific capacitance retention after 1000 cycles and See Table 1 for the ratio of specific capacitance retention improvement.

[0068] Table 1 embodiment two to eighteen electrolyte formulations and test results

[0069]

[0070]

[0071] In embodiment two to eighteen, the specific capacitance retention ratio measurement condition is identical with embodiment one; The obtained use of the corresponding methylsulfate ionic liquid without adding alkyl silane as the percentage of the increase in the specific capacitance retention rate of the double-layer capacitor of the electrolyte.

[0072] As can be seen from t...

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Abstract

An electrolyte comprises methyl sulfate ionic liquid and alkylsilane dissolved in the methyl sulfate ionic liquid. The mass ratio of the methyl sulfate ionic liquid and the alkylsilane is 1:(0.001-1):0.05. In the above electrolyte, the added alkylsilane reacts with mineral acid impurities in the methyl sulfate ionic liquid, and accordingly the mineral acid impurities in the methyl sulfate ionic liquid are eliminated, the mineral acid impurities are prevented from corroding aluminum foil of a double-layer capacitor, stability of the double-layer capacitor using the methyl sulfate ionic liquid as the electrolyte can be greatly improved, the stability of the double-layer capacitor using the electrolyte can be enhanced by adding the alkylsilane, and cost is lowered.

Description

【Technical field】 [0001] The invention relates to an electrolytic solution, in particular to an electrolytic solution containing methylsulfate ionic liquid and a preparation method thereof. 【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 electric double layer capacitors, the electrolyte has a great influence on the storage performance of electric double layer capacitors, which determines the equivalent internal resistance, 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. As ...

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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