High-temperature-resistant long-service-life electrolyte for aluminum electrolytic capacitor

A technology for aluminum electrolytic capacitors with long life, which is applied in the direction of electrolytic capacitors, electrolytic capacitor manufacturing, capacitors, etc., and can solve the problems that the high temperature resistance performance of aluminum electrolytic capacitors needs to be improved, so as to overcome the shortened life, reduce the deterioration of oxide film, and reduce the possibility Effect

Active Publication Date: 2020-12-25
CHANGZHOU HUAWEI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide an electrolytic solution for aluminum electrolytic capacitors with high temperature resistance and long service life, which solves the problem that the high temperature resistance performance of aluminum electrolytic capacitors needs to be improved in the prior art

Method used

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  • High-temperature-resistant long-service-life electrolyte for aluminum electrolytic capacitor

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Experimental program
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Effect test

Embodiment 1

[0029] refer to figure 1 , an electrolytic solution for aluminum electrolytic capacitors with high temperature resistance and long service life, the preparation process of which comprises the following steps:

[0030] S01: Preparation of materials, including conductive polymer basic composition, branched polycarboxylate and ethylene glycol system solvent; solvent ethylene glycol 50g, additive A mannitol 5g, additive B phosphoric acid monoester 5g, solute ammonium azelate 10g , 20g of conductive polymer polythiophene, 2g of p-nitrophenol as hydrogen suppressor and 8g of hypophosphite as waterproof mixture;

[0031] S02: Heat the ethylene glycol system solution at a constant temperature in the reactor; keep the temperature range at 100°C;

[0032] S03: In step S02, add branched polycarboxylate additives, namely Additive A and Additive B, and increase the heating temperature in the reactor, keep the temperature in the reactor constant; the temperature range is kept at 120°C;

...

Embodiment 2

[0036] refer to figure 1 , an electrolytic solution for aluminum electrolytic capacitors with high temperature resistance and long service life, the preparation process of which comprises the following steps:

[0037] S01: Prepare materials, including conductive polymer basic composition, branched polycarboxylate and ethylene glycol system solvent; solvent δ-butyrolactone 60g, additive A8-hydroxyquinoline 5g, additive B ethylenediaminetetraacetic acid 5g, Solute 1.7-ammonium sebacate 10g, conductive polymer polyaniline 10g, hydrogen remover p-nitrobenzyl alcohol 2g and water-repellent mixture ammonium dihydrogen phosphate 8g;

[0038] S02: Heat the ethylene glycol system solution at a constant temperature in the reactor; keep the temperature range at 80°C;

[0039] S03: In step S02, add branched polycarboxylate additives, namely Additive A and Additive B, and increase the heating temperature in the reactor, keep the temperature in the reactor constant; the temperature range i...

Embodiment 3

[0043] refer to figure 1 , an electrolytic solution for aluminum electrolytic capacitors with high temperature resistance and long service life, the preparation process of which comprises the following steps:

[0044] S01: Preparation of materials, including conductive polymer basic composition, branched polycarboxylate and ethylene glycol system solvent; solvent ethylene glycol 65g, additive A polyvinylpyrrolidone 5g, additive B polyethylene glycol 5g, solute sebacic acid Ammonium 10g, conductive polymer polypyrrole 10g, dehydrogenation agent p-nitrobenzyl alcohol 1g and waterproof mixture agent ammonium dihydrogen phosphate 4g;

[0045] S02: Heat the ethylene glycol system solution at a constant temperature in the reactor; keep the temperature range at 85°C;

[0046] S03: Add branched polycarboxylate additives in step S02, that is, Additive A and Additive B, and after increasing the heating temperature in the reactor, keep the temperature in the reactor constant; the temper...

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Abstract

The invention discloses a high-temperature-resistant long-service-life electrolyte for an aluminum electrolytic capacitor. The preparation process comprises the steps of S01, preparing materials whichcomprise a conductive polymer basic composition, branched chain polycarboxylate and an ethylene glycol system solvent. According to the invention, the electrolyte is developed through the cooperationof the conductive polymer, the branched chain polycarboxylate and the ethylene glycol system, wherein the branched chain polycarboxylate has the effects of providing oxygen ions and repairing an anodic oxide film, and the conductive polymer has the effects of reducing the impedance of the electrolyte and improving the conductivity of the electrolyte; the anode oxide film is reinforced and protected, the impedance of the anode oxide film is reduced, and the conductivity of the anode oxide film is improved, so that the use temperature and the working voltage of the aluminum electrolytic capacitor are improved, the hydration reaction of electrolyte due to high temperature is reduced, the degradation of the oxide film is reduced, and the possibility of aluminum corrosion is reduced; and the electrolyte for the aluminum electrolytic capacitor is resistant to high temperature and long in service life.

Description

technical field [0001] The invention relates to an electrolytic solution of an aluminum electrolytic capacitor with high temperature resistance and long service life. Background technique [0002] A capacitor is an energy storage element, that is, used to store electric charge. Aluminum electrolytic capacitor electrolyte is a kind of electrolytic capacitor. [0003] Aluminum electrolytic capacitors use high-purity aluminum as the anode and the electrolyte as the cathode. Aluminum is electrolyzed in the electrolyte to form an extremely thin aluminum oxide film on the surface of the aluminum. The main function of the aluminum oxide film is not only non-conductive, but also Improve the corrosion resistance of aluminum, increase the hardness of the aluminum surface, thereby improving the storage performance of aluminum electrolytic capacitors; and the working electrolyte of aluminum electrolytic capacitors is an electrolyte that is installed inside the capacitor to repair the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/00H01G9/035
CPCH01G9/0029H01G9/035
Inventor 颜奇旭王坤亮张翼蓝云鹏
Owner CHANGZHOU HUAWEI ELECTRONICS
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