Electrolyte solution for high hydration resistance medium and high voltage aluminum electrolytic capacitor and preparation method
An aluminum electrolytic capacitor, hydration technology, applied in the direction of electrolytic capacitors, liquid electrolytic capacitors, capacitors, etc., can solve the problems of capacitor failure, capacitor capacity and other parameters deterioration, unable to adapt to the development trend of long life of electrolytic capacitors, etc., to improve the conductivity rate, improved self-healing properties, patch performance enhancements
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[0040] A method for preparing an electrolyte solution for a high-hydration-resistant medium and high-voltage aluminum electrolytic capacitor, characterized in that it comprises the following steps:
[0041] Step 1: weighing 1-20% of the main solute, 0.01-5% of the auxiliary solute containing fluorine, 70-90% of the solvent and 0.04-15% of the additive in terms of mass percentage;
[0042] Step 2: at 50-90°C, add the main solute and the fluorine-containing auxiliary solute into the solvent, and stir until they are evenly mixed to obtain a mixed solution;
[0043] Step 3: At 85-90°C, add additives to the mixed solution obtained in Step 2, and stir until evenly mixed to obtain a mixed solution;
[0044] Step 4: boil the mixed solution obtained in Step 3 at 90-130° C. for 30-120 minutes, and cool to obtain an electrolyte solution for medium and high voltage aluminum electrolytic capacitors with high hydration resistance.
[0045] An electrolytic capacitor whose working electrolyt...
Embodiment 1
[0048] The electrolyte solution for medium and high voltage aluminum electrolytic capacitors was prepared according to the following mass percentages: ammonium suberate 15%, ammonium sebacate 5%, perfluoroammonium sebacate 2%, isoperfluoroammonium sebacate 3%, water 5% , ethylene glycol 50%, γ-butyrolactone 10%, phosphoric acid 5%, p-nitrobenzoic acid 1%, polyethylene glycol 2%, citric acid 0.5%, ammonium citrate 0.5% and mannitol 1%.
[0049] The preparation method is as follows:
[0050] Step 1: weighing each component according to the mass percentage of the above components;
[0051] Step 2: At 50°C, add ammonium suberate, ammonium sebacate, ammonium perfluorosebacate and ammonium isoperfluorosebacate to a mixture of water, ethylene glycol, γ-butyrolactone and n-butanol , stir until evenly mixed to obtain a mixed solution;
[0052] Step 3: Add phosphoric acid, p-nitrobenzoic acid, polyethylene glycol, citric acid, ammonium citrate and mannitol to the mixed solution obtain...
Embodiment 2
[0055] The electrolyte solution for medium and high voltage aluminum electrolytic capacitors was prepared according to the following mass percentages: 1% ammonium suberate, 5% ammonium sebacate, 3% ammonium neosebacate, 2% isododecanedioic acid, 1% perfluorosebacic acid %, Ammonium Isoperfluorosebacate 1%, Water 0.5%, Ethylene Glycol 76.5%, Glycerin 5%, Phosphoric Acid 1%, p-Nitrophenol 1%, Polyvinyl Alcohol 1%, Polyethylene Glycol 1% %, tartaric acid 0.01%, ammonium tartrate 0.01% and mannitol 0.98%.
[0056] The preparation method is as follows:
[0057] Step 1: weighing each component according to the mass percentage of the above components;
[0058] Step 2: At 90°C, add ammonium suberate, ammonium sebacate, ammonium neosebacate, isododecanedioic acid, perfluorosebacic acid and ammonium isoperfluorosebacate into water, ethylene glycol In the mixture with glycerol, stir until evenly mixed to obtain a mixed solution;
[0059] Step 3: Add phosphoric acid, p-nitrophenol, pol...
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