Ternary mixed ionic liquid electrolyte and preparation method and application thereof

A technology of ionic liquid and electrolyte, which is applied in the field of ternary mixed ionic liquid electrolyte and its preparation, can solve the problems of infiltration of activated carbon materials, low specific capacitance of electrolyte, and reduced conductivity, etc., to achieve enhanced electrochemical performance, Effects of improving electrical conductivity and reducing viscosity

Inactive Publication Date: 2016-02-03
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although ionic liquid-based supercapacitors show many advantages, their disadvantages are that they cannot be well infiltrated with activated carbon materials, and the high viscosity also reduces their conductivity, making the specific capacitance of this type of electrolyte low.

Method used

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  • Ternary mixed ionic liquid electrolyte and preparation method and application thereof
  • Ternary mixed ionic liquid electrolyte and preparation method and application thereof
  • Ternary mixed ionic liquid electrolyte and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 3

[0021] Example 1 Preparation of ternary mixed ionic liquid electrolyte

[0022] 1. Put tetraethylammonium tetrafluoroborate (C 8 H 20 BF 4 N) and 1-butyl-3-methylimidazole tetrafluoroborate ionic liquid ([Bmim]BF 4 ), vacuum drying for 48h respectively. Press tetraethylammonium tetrafluoroborate (C 8 H 20 BF 4 N) and 1-butyl-3-methylimidazole tetrafluoroborate ionic liquid ([Bmim]BF 4 The molar ratio of) is 0.02:1, weigh a certain amount of [Bmim]BF 4 And C 8 H 20 BF 4 N, stir at room temperature for 48h, make C 8 H 20 BF 4 N / [Bmim]BF 4 Mixture. Will C 8 H 20 BF 4 N / [Bmim]BF 4 The mixed solution is vacuum dried at 80°C, sealed with a parafilm, and then transferred to a desiccator for later use. All configuration processes are carried out in a glove box under nitrogen atmosphere. C 8 H 20 BF 4 N / [Bmim]BF 4 The mixed solution was measured by Karl Fischer moisture meter (ET-08), and the moisture content of the product was less than 0.06%.

[0023] 2. Take C 8 H 20 BF 4 N / [Bmim]BF 4 ...

Embodiment 2 3

[0024] Example 2 Preparation of ternary mixed ionic liquid electrolyte

[0025] 1. Put tetraethylammonium tetrafluoroborate (C 8 H 20 BF 4 N) and 1-butyl-3-methylimidazole tetrafluoroborate ionic liquid ([Bmim]BF 4 ), vacuum drying for 48h respectively. Press tetraethylammonium tetrafluoroborate (C 8 H 20 BF 4 N) and 1-butyl-3-methylimidazole tetrafluoroborate ionic liquid ([Bmim]BF 4 The molar ratio of) is 0.04:1, weigh a certain amount of [Bmim]BF 4 And C 8 H 20 BF 4 N, stir at room temperature for 48h, make C 8 H 20 BF 4 N / [Bmim]BF 4 Mixture. Will C 8 H 20 BF 4 N / [Bmim]BF 4 The mixed solution is vacuum dried at 80°C, sealed with a parafilm, and then transferred to a desiccator for later use. All configuration processes are carried out in a glove box under nitrogen atmosphere. C 8 H 20 BF 4 N / [Bmim]BF 4 The mixed solution was measured by Karl Fischer moisture meter (ET-08), and the moisture content of the product was less than 0.06%.

[0026] 2. Take C 8 H 20 BF 4 N / [Bmim]BF 4 ...

Embodiment 3 3

[0027] Example 3 Preparation of ternary mixed ionic liquid electrolyte

[0028] 1. Put tetraethylammonium tetrafluoroborate (C 8 H 20 BF 4 N) and 1-butyl-3-methylimidazole tetrafluoroborate ionic liquid ([Bmim]BF 4 ), vacuum drying for 48h respectively. Press tetraethylammonium tetrafluoroborate (C 8 H 20 BF 4 N) and 1-butyl-3-methylimidazole tetrafluoroborate ionic liquid ([Bmim]BF 4 The molar ratio of) is 0.06:1, weigh a certain amount of [Bmim]BF 4 And C 8 H 20 BF 4 N, stir at room temperature for 48h, make C 8 H 20 BF 4 N / [Bmim]BF 4 Mixture. Will C 8 H 20 BF 4 N / [Bmim]BF 4 The mixed solution is vacuum dried at 80°C, sealed with a parafilm, and then transferred to a desiccator for later use. All configuration processes are carried out in a glove box under nitrogen atmosphere. C 8 H 20 BF 4 N / [Bmim]BF 4 The mixed solution was measured by Karl Fischer moisture meter (ET-08), and the moisture content of the product was less than 0.06%.

[0029] 2. Take C 8 H 20 BF 4 N / [Bmim]BF 4 ...

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Abstract

The invention relates to a ternary mixed ionic liquid electrolyte and a preparation method and application thereof. Tetraethylammonium tetrafluoroborate (C<8>H<20>BF<4>N) and [Bmim]BF<4> ionic liquid are mixed according to a mol ratio of 0.02 - 0.06 : 1. Under the protection of nitrogen, the mixture is stirred at the room temperature for 40 to 50 hours and prepared into a mixed liquid. The mixed liquid is vacuum-dried until the water content is less than 0.06%, and a C<8>H<20>BF<4>N / [Bmim]BF<4> mixed liquid is obtained. With C<8>H<20>BF<4>N / [Bmim]BF<4> as solute and propylene carbonate as solvent, an electrolyte with a concentration of 0.5 - 1.5 mol * L<-1> is prepared. The electrolyte has a wide electrochemical window, a high conductive rate, low internal resistance, and other advantages. The preparation method is simple. Compared with a commercial electrolyte, the mixed electrolyte is cheaper in price and better in performance, and thus has great potential in application as a super capacitor electrolyte.

Description

Technical field [0001] The invention belongs to the technical field of electrolyte preparation, and specifically relates to a ternary mixed ionic liquid electrolyte and a preparation method thereof. Background technique [0002] With its excellent physical and chemical properties, ionic liquids, as ideal "green" solvents, new reaction media, and "soft" functional materials, have become one of the most active frontier research fields in green chemistry with interdisciplinary research. Ionic liquids have the advantages of wide electrochemical window, good chemical stability, non-volatile, easy storage and recyclable use, etc., making them have extremely high application potential in the field of electrochemical research. Although ionic liquid-based supercapacitors show many advantages, their disadvantage is that they cannot be well infiltrated with activated carbon materials. At the same time, the higher viscosity also reduces their electrical conductivity, making the specific capa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/58H01G11/62
CPCY02E60/13
Inventor 张庆国魏颖张光菊仇方圆刘东野苏明明郭景阳
Owner BOHAI UNIV
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