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A kind of ultra-low temperature electrolyte

An electrolyte and ultra-low temperature technology, applied in electrolytic capacitors, liquid electrolytic capacitors, circuits, etc., can solve problems such as poor performance of capacitors, and achieve the effects of low viscosity, reduced capacity loss, and high conductivity

Active Publication Date: 2022-01-11
广州金立电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem solved by the present invention is the problem of poor performance of capacitors at low temperatures, providing an ultra-low temperature electrolyte

Method used

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  • A kind of ultra-low temperature electrolyte
  • A kind of ultra-low temperature electrolyte
  • A kind of ultra-low temperature electrolyte

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A kind of ultra-low temperature electrolyte, comprising:

[0037] The solute is tetrafluoroboric acid double spiro quaternary ammonium salt SBP-BF 4 1mol / L;

[0038] The solvent is ethylene carbonate (EC) 12.5%, dimethyl carbonate (DMC) 28%, propylene carbonate (PC) 19%, ethyl methyl carbonate (EMC) 24%, N,N-dimethyltris A mixture of 10% fluoroacetamide (DTA) and 6.5% tetrahydrofuran (THF).

[0039] The preparation method of described solvent is:

[0040] Mix ethylene carbonate (EC) and dimethyl carbonate (DMC) and heat up to 50°C, add half of N,N-dimethyltrifluoroacetamide and tetrahydrofuran;

[0041] Slowly add propylene carbonate (PC) and ethyl methyl carbonate (EMC), heat up to 60°C, keep stirring for 2h;

[0042] After cooling down to normal temperature, the remaining N,N-dimethyltrifluoroacetamide and tetrahydrofuran were added and stirred evenly to obtain a solvent.

[0043] The preparation method of described electrolyte is:

[0044] The temperature of th...

Embodiment 2

[0047] An ultra-low temperature electrolyte, comprising:

[0048] The solute is tetrafluoroboric acid double spiro quaternary ammonium salt SBP-BF 4 1.5 mol / L;

[0049] The solvent is ethylene carbonate (EC) 10%, dimethyl carbonate (DMC) 25%, propylene carbonate (PC) 20%, ethyl methyl carbonate (EMC) 25%, N,N-dimethyltris A mixture of 12% fluoroacetamide (DTA) and 8% tetrahydrofuran (THF).

[0050] The preparation method of described solvent is:

[0051] Mix ethylene carbonate (EC) and dimethyl carbonate (DMC) and heat up to 50°C, add half of N,N-dimethyltrifluoroacetamide and tetrahydrofuran;

[0052] Slowly add propylene carbonate (PC) and ethyl methyl carbonate (EMC), heat up to 60°C, keep stirring for 2h;

[0053] After cooling down to normal temperature, the remaining N,N-dimethyltrifluoroacetamide and tetrahydrofuran were added and stirred evenly to obtain a solvent.

[0054] The preparation method of described electrolyte is:

[0055] The temperature of the solve...

Embodiment 3

[0057] An ultra-low temperature electrolyte, comprising:

[0058] The solute is tetrafluoroboric acid double spiro quaternary ammonium salt SBP-BF 4 1mol / L;

[0059] The solvent is ethylene carbonate (EC) 13%, dimethyl carbonate (DMC) 28%, propylene carbonate (PC) 20%, ethyl methyl carbonate (EMC) 25%, N,N-dimethyl trimethyl A mixture of 8% fluoroacetamide (DTA) and 6% tetrahydrofuran (THF).

[0060] The preparation method of described solvent is:

[0061] Mix ethylene carbonate (EC) and dimethyl carbonate (DMC) and heat up to 50°C, add half of N,N-dimethyltrifluoroacetamide and tetrahydrofuran;

[0062] Slowly add propylene carbonate (PC) and ethyl methyl carbonate (EMC), heat up to 60°C, keep stirring for 2h;

[0063] After cooling down to normal temperature, the remaining N,N-dimethyltrifluoroacetamide and tetrahydrofuran were added and stirred evenly to obtain a solvent.

[0064] The preparation method of described electrolyte is:

[0065] The temperature of the sol...

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Abstract

The invention relates to the field of electrolytes for capacitors, and provides an ultra-low temperature electrolyte for solving the problem of poor performance of capacitors at low temperatures. A kind of ultra-low temperature electrolyte solution provided by the present invention, comprises: solute and solvent, and described solute is tetrafluoroboric acid bispiro quaternary ammonium salt 1~1.5M; Described solvent is ethylene carbonate, dimethyl carbonate, propylene carbonate , ethyl methyl carbonate, N,N-dimethyltrifluoroacetamide, a mixture of tetrahydrofuran. It can maintain large capacity at low temperature, adapt to low temperature environment, and has high electrical conductivity and low viscosity at low temperature.

Description

technical field [0001] The invention relates to the field of electrolytes for capacitors, in particular to an ultra-low temperature electrolyte. Background technique [0002] With the rapid development of aluminum electrolytic capacitors in the direction of small size, large capacity, high performance, and low cost, especially the wide application of surface mount technology (SMT), for example, on the surface of printed circuit boards (PCB) or other substrates Chip-type aluminum electrolytic capacitors are attracting great attention in the field of electronic equipment such as soldering assembly and electronic complete machine assembly. [0003] There are still many technical difficulties in the production of aluminum capacitors with ultra-low temperature, large capacity, low equivalent series resistance (ESR), and high temperature resistance. For example, defects such as electrolyte leakage, capacitor short circuit, large leakage current rise after reflow soldering, large ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/035H01G9/145
CPCH01G9/035H01G9/145
Inventor 张洪斌张业维林娟吴培恺
Owner 广州金立电子有限公司
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