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High-sparking voltage boron series-free working electrolyte and preparation method thereof

A flash voltage and electrolyte technology, applied in the field of electrochemistry, can solve the problems of low flash voltage and short service life, and achieve high flash voltage, reliable quality and stable performance

Active Publication Date: 2014-03-12
江西联晟电子股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the working electrolyte for medium and high voltage aluminum electrolytic capacitors in the prior art also has the disadvantages of low flashover voltage and short service life.

Method used

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  • High-sparking voltage boron series-free working electrolyte and preparation method thereof

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preparation example Construction

[0039] In the preparation method of the high flashover voltage boron-free working electrolyte of the present invention, comprise the following steps:

[0040] S1. Weighing: Weigh solvents, repairing agents, passivators, flash voltage boosters and hydrogen removers. The weighed weight components are consistent with the weight components in the electrolyte solution of the present invention.

[0041] Wherein, solvent is ethylene glycol;

[0042] The repair agent is organic ammonium carboxylate, and the organic ammonium carboxylate is ammonium adipate, ammonium suberate, ammonium hydrogen azelate, ammonium sebacate, ammonium dodecanoate, 1,7-ammonium sebacate, 1 , at least one of ammonium 6-dodecadedioate, ammonium 1,10-hexadecadioate, and ammonium 1,12-octadecadedioate;

[0043] The passivating agent is ammonium hypophosphite;

[0044] The flash voltage booster is at least one of diethylene glycol ether, polyethylene glycol ether, polyglyceryl ether, polymannitol ether, and poly...

Embodiment 1

[0050] Weigh in parts by weight: 50 parts of ethylene glycol, 40 parts of ammonium adipate, 0.6 parts of ammonium hypophosphite, 7.4 parts of diethylene glycol ether, and 2 parts of p-nitrobenzyl alcohol to prepare high flash voltage boron-free system working electrolyte.

[0051] Prepare high flash voltage boron-free working electrolyte with the above-mentioned weighed raw materials:

[0052] (1) Dissolving for the first time: Add ethylene glycol, ammonium adipate and diethylene glycol ether into the container, heat to 140°C, stir until completely dissolved; stop heating, continue stirring, and cool down to 110°C.

[0053] (2) Dissolving for the second time: add ammonium hypophosphite and p-nitrobenzyl alcohol in sequence to the solution cooled to 110°C in (1), and keep the temperature at 110°C for 50 minutes.

[0054] (3) Cooling: place and cool to room temperature, room temperature is 20°C, to obtain electrolyte.

Embodiment 2

[0056] Weigh by parts by weight: 80 parts of ethylene glycol, 10 parts of ammonium suberate, 0.1 part of ammonium hypophosphite, 9.7 parts of polyethylene glycol ether, 0.2 part of p-nitrobenzyl alcohol, to prepare high flash voltage boron-free Department of working electrolyte.

[0057] Prepare high flash voltage boron-free working electrolyte with the above-mentioned weighed raw materials:

[0058] (1) Dissolving for the first time: Add ethylene glycol, ammonium suberate and polyethylene glycol ether into the container, heat to 140°C, stir until completely dissolved; stop heating, continue stirring, and cool down to 110°C.

[0059] (2) Dissolving for the second time: add ammonium hypophosphite and p-nitrobenzyl alcohol in sequence to the solution in (1) cooled down to 110°C, and keep the temperature at 110°C for 70 minutes.

[0060] (3) Cooling: place and cool to room temperature, room temperature is 25°C, to obtain electrolyte.

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Abstract

The invention discloses a high-sparking voltage boron series-free working electrolyte and a preparation method thereof. The electrolyte comprises, by weight, 50% to 80% of a solvent, 2% to 40% of a healant, 0.1% to 1% of a passivator, 1% to 15% of a sparking voltage boosting agent, and 0.2% to 5% of a dehydrogenation agent. The preparation method comprises the following steps: S1, carrying out weighing; S2, adding the solvent, the healant and the sparking voltage improving agent into a container, carrying out heating to raise the temperature to 140 DEG C, stirring to realize full dissolving, stopping heating and stirring continuously, and cooling to the temperature of 110 DEG C; S3, successively adding the passivator and the hydrogen elimination agent into the 110-DEG C solution obtained in the step S2 and carrying out 110-DEG C constant temperature processing for 50 to 70 mins; and S4, cooling the solution obtained in the step S4 to the room temperature to obtain an electrolyte. The beneficial effects are as follows: the electrolyte does not contain boric acid or borate; the sparking voltage of the electrolyte is high and thus security and stability of the electrolyte can be realized beneficially due to the high sparking voltage; and the service life is long.

Description

technical field [0001] The invention relates to the technical field of electrochemistry, and more specifically relates to a high flash voltage boron-free working electrolyte for medium and high voltage aluminum electrolytic capacitors and a preparation method thereof. Background technique [0002] Medium and high voltage aluminum electrolytic capacitors are widely used in general electronic circuits, and their main uses are energy storage, filtering, coupling, oscillation, phase shifting, step-down, integration, memory, etc. As the actual negative electrode of the electrolytic capacitor, the working electrolyte of the medium and high voltage electrolytic capacitor occupies an extremely important position in the electrolytic capacitor product. It affects whether the product can work normally for a long time, and has the function of optimizing the electrical performance of the capacitor. [0003] The traditional working electrolyte for medium and high voltage aluminum electrol...

Claims

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Application Information

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IPC IPC(8): H01G9/035
Inventor 程学鹏
Owner 江西联晟电子股份有限公司
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