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A kind of ternary mixed type ionic liquid electrolyte and its preparation method and application

An ionic liquid and electrolyte technology, which is applied in the field of ternary mixed ionic liquid electrolyte and its preparation, can solve the problems such as inability to infiltrate activated carbon materials, low specific capacitance of the electrolyte, and reduced electrical conductivity, and achieves enhanced electrochemical performance, The effect of improving conductivity and reducing viscosity

Inactive Publication Date: 2018-03-16
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A kind of ternary mixed type ionic liquid electrolyte and its preparation method and application
  • A kind of ternary mixed type ionic liquid electrolyte and its preparation method and application
  • A kind of ternary mixed type ionic liquid electrolyte and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 3

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

[0022] 1. Tetraethyl ammonium tetrafluoroborate (C 8 h 20 BF 4 N) and 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid ([Bmim]BF 4 ), were vacuum-dried for 48h. According to tetraethylammonium tetrafluoroborate (C 8 h 20 BF 4 N) and 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid ([Bmim]BF 4 ) in a molar ratio of 0.02:1, weigh a certain amount of [Bmim]BF 4 and C 8 h 20 BF 4 N, stirred at room temperature for 48h, dubbed C 8 h 20 BF 4 N / [Bmim]BF 4 Mixture. Will C 8 h 20 BF 4 N / [Bmim]BF 4 The mixture was vacuum-dried at 80°C, sealed with parafilm, and then transferred to a desiccator for later use. All configurations were performed in a glove box under a nitrogen atmosphere. C 8 h 20 BF 4 N / [Bmim]BF 4 The mixed solution is measured by a Karl Fischer moisture meter (ET-08), and the water content of the product is less than 0.06%.

[0023] 2. With C 8 h 20 ...

Embodiment 2 3

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

[0025] 1. Tetraethyl ammonium tetrafluoroborate (C 8 h 20 BF 4 N) and 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid ([Bmim]BF 4 ), were vacuum-dried for 48h. According to tetraethylammonium tetrafluoroborate (C 8 h 20 BF 4 N) and 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid ([Bmim]BF 4 ) in a molar ratio of 0.04:1, weigh a certain amount of [Bmim]BF 4 and C 8 h 20 BF 4 N, stirred at room temperature for 48h, dubbed C 8 h 20 BF 4 N / [Bmim]BF 4 Mixture. Will C 8 h 20 BF 4 N / [Bmim]BF 4 The mixture was vacuum-dried at 80°C, sealed with parafilm, and then transferred to a desiccator for later use. All configurations were performed in a glove box under a nitrogen atmosphere. C 8 h 20 BF 4 N / [Bmim]BF 4 The mixed solution is measured by a Karl Fischer moisture meter (ET-08), and the water content of the product is less than 0.06%.

[0026] 2. With C 8 h 20 ...

Embodiment 3 3

[0027] Embodiment 3 Preparation of ternary mixed type ionic liquid electrolyte

[0028] 1. Tetraethyl ammonium tetrafluoroborate (C 8 h 20 BF 4 N) and 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid ([Bmim]BF 4 ), were vacuum-dried for 48h. According to tetraethylammonium tetrafluoroborate (C 8 h 20 BF 4 N) and 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid ([Bmim]BF 4 ) in a molar ratio of 0.06:1, weigh a certain amount of [Bmim]BF 4 and C 8 h 20 BF 4 N, stirred at room temperature for 48h, dubbed C 8 h 20 BF 4 N / [Bmim]BF 4 Mixture. Will C 8 h 20 BF 4 N / [Bmim]BF 4 The mixture was vacuum-dried at 80°C, sealed with parafilm, and then transferred to a desiccator for later use. All configurations were performed in a glove box under a nitrogen atmosphere. C 8 h 20 BF 4 N / [Bmim]BF 4 The mixed solution is measured by a Karl Fischer moisture meter (ET-08), and the water content of the product is less than 0.06%.

[0029] 2. With C 8 h...

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Abstract

The invention relates to a ternary mixed ionic liquid electrolyte and a preparation method and application thereof. Mix tetraethylammonium tetrafluoroborate and 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid at a molar ratio of 0.02-0.06:1, and stir at room temperature for 40-50 hours under nitrogen protection to prepare The mixed solution is vacuum-dried to make the water content less than 0.06% to obtain a C8H20BF4N / [Bmim]BF4 mixed solution. Using C8H20BF4N / [Bmim]BF4 as the solute and propylene carbonate as the solvent, a 0.5-1.5mol L-1 electrolyte solution was prepared. The ternary mixed ionic liquid electrolyte of the present invention has the advantages of wide electrochemical window, high electrical conductivity, small internal resistance, etc., and the preparation method is simple. Compared with commercial electrolytes, the mixed electrolyte is cheaper and has better performance. It is more prominent and has great potential in the application as supercapacitor electrolyte.

Description

technical field [0001] The invention belongs to the technical field of electrolyte preparation, and in particular 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 of green chemistry with interdisciplinary fields. Ionic liquids have the advantages of wide electrochemical window, good chemical stability, non-volatility, easy storage and recyclable use, which make them have extremely high application potential in the field of electrochemical research. Although ionic liquid-based supercapacitors exhibit many advantages, their disadvantages are that they cannot be well infiltrated with activated carbon materials, and the high viscosity also reduces their conductivity, making this type of electrolyte low in spec...

Claims

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Application Information

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Patent Type & Authority Patents(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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