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Electrolyte for ultrahigh-voltage aluminum electrolytic capacitor as well as preparation method and application thereof

A technology of aluminum electrolytic capacitors and electrolytes, applied in electrolytic capacitors, liquid electrolytic capacitors, capacitors, etc., can solve the problems of short life, restricting high stability, long-life high-voltage aluminum electrolytic capacitors, and large leakage current, so as to ensure long life. , high stability, the effect of improving solubility

Active Publication Date: 2020-12-04
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the electrolyte with low conductivity is applied to aluminum electrolytic capacitors, the leakage current is large and the life is short, which seriously restricts the development of high-stability, long-life, high-voltage aluminum electrolytic capacitors

Method used

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  • Electrolyte for ultrahigh-voltage aluminum electrolytic capacitor as well as preparation method and application thereof
  • Electrolyte for ultrahigh-voltage aluminum electrolytic capacitor as well as preparation method and application thereof
  • Electrolyte for ultrahigh-voltage aluminum electrolytic capacitor as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Mix (octahydro-1H-4,7-methyleneindene-2,5-diyl)dimethanol with a molar ratio of 1:2 and Na wire at 25°C under N 2 Reaction under protection for 4h, obtained (octahydro-1H-4,7-methyleneindene-2,5-diyl) sodium dimethoxide.

[0041] Mix the above (octahydro-1H-4,7-methyleneindene-2,5-diyl)sodium dimethoxide and 2-bromooctanoic acid ethyl ester at a molar ratio of 1:2, and reflux at 25°C for 6h , to obtain the ester of the final product.

[0042] Add 30ml of deionized water to the reaction solution, and add an equivalent of 1mol / L NaOH solution to convert the ester of the target product into a sodium salt, and then add phosphoric acid dropwise to adjust the pH value of the solution to 3-5. At this time, the target product consists of three fats The sodium salt of cyclodimethoxydioctanoic acid becomes tri-aliphatic cyclodimethoxydioctanoic acid; 30ml ethyl acetate is added to the above reaction solution to extract the target product from the water layer, separate the ester ...

Embodiment 2

[0049] (Octahydro-1H-4,7-methyleneindene-2,5-diyl)dimethanol with a molar ratio of 1:2 was mixed with Na wire at 32°C under N 2 Reaction under protection for 4h, obtained (octahydro-1H-4,7-methyleneindene-2,5-diyl) sodium dimethoxide.

[0050] Mix the above (octahydro-1H-4,7-methyleneindene-2,5-diyl)sodium dimethoxide and 2-bromooctanoic acid ethyl ester at a molar ratio of 1:2, and reflux at 32°C for 6h , to obtain the ester of the final product.

[0051] Add 30ml of deionized water to the reaction solution, and add an equivalent of 1mol / L NaOH solution to convert the ester of the target product into a sodium salt, and then add phosphoric acid dropwise to adjust the pH value of the solution to 3-5. At this time, the target product consists of three fats The sodium salt of cyclodimethoxydioctanoic acid becomes tri-aliphatic cyclodimethoxydioctanoic acid; 30ml ethyl acetate is added to the above reaction solution to extract the target product from the water layer, separate the...

Embodiment 3

[0055] Mix (octahydro-1H-4,7-methyleneindene-2,5-diyl)dimethanol with a molar ratio of 1:2 and Na wire at 20°C under N 2 Reaction under protection for 8h, obtained (octahydro-1H-4,7-methyleneindene-2,5-diyl) sodium dimethoxide.

[0056] Mix the above (octahydro-1H-4,7-methyleneindene-2,5-diyl)sodium dimethoxide with 2-bromooctanoic acid ethyl and propyl ester at a molar ratio of 1:2, and reflux at 20°C After 10 hours of reaction, the ester of the final product was obtained.

[0057] Add 30ml of deionized water to the reaction solution, and add an equivalent of 1mol / L NaOH solution to convert the ester of the target product into a sodium salt, and then add phosphoric acid dropwise to adjust the pH value of the solution to 3-5. At this time, the target product consists of three fats The sodium salt of cyclodimethoxydioctanoic acid becomes trialiphatic cyclodimethoxydioctanoic acid; 20ml ethyl acetate is added to the above reaction solution to extract the target product from the...

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Abstract

The invention relates to an electrolyte for an ultrahigh-voltage aluminum electrolytic capacitor as well as a preparation method and application of the electrolyte. The structural formula of the electrolyte is described in the descriptions of the invention. The organic compound electrolyte is trialicyclic dimethoxy dioctanoic acid, and the specific chemical name of theorganic compound electrolyteis 2, 2' [(octahydro-1H-4, 7-methylene indene)-2, 5-dimethoxy] dioctanoic acid. Compared with the prior art, the synthesis and purification of the trialicyclic dimethoxy dioctanoic acid provided by the invention are simple, the yield reaches 90% or above, the economical efficiency is higher, and the trialicyclic dimethoxy dioctanoic acid conforms to the green chemistry principle; the trialicyclicdimethoxy dioctanoic acid is added into a proper solvent as an electrolyte, the pH value is adjusted to 6-7, so that the working electrolyte for the aluminum electrolytic capacitor is prepared, and the sparking voltage of the working electrolyte reaches up to 750 V or above. With the provision and synthesis of the electrolyte realized, the technical bottleneck of electrolytes for the current high-voltage aluminum electrolytic capacitors in China is broken; the rigid thinking that long straight-chain polybasic carboxylic acid is used as the electrolyte is broken through; and continuous power iscreated for China to promote the capacitor industry to the worldwide level.

Description

technical field [0001] The invention relates to the technical field of electronics and chemical industry, in particular to an electrolyte trialiphatic dimethoxydioctanoic acid for an ultra-high voltage aluminum electrolytic capacitor and a preparation method and application thereof. Background technique [0002] With the development of industrial electronic and electrical equipment at home and abroad, the requirements for the output of DC circuits in circuits are getting higher and higher. The technical level of modern capacitors has become a bottleneck restricting the development of circuit miniaturization among the three major components of capacitance, inductance and resistance. Improvement and invention of new Miniaturization, high-capacity, and high-voltage capacitors have become an inevitable trend in the development of capacitors in the future. [0003] Compared with other conventional capacitors such as ceramic capacitors, safety capacitors, film capacitors, and poly...

Claims

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Application Information

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IPC IPC(8): C07C29/70C07C31/30C07C27/02C07C59/31C07C67/31C07C69/708H01G9/145H01G9/035
CPCC07C29/70C07C51/09C07C59/31C07C67/31C07C2603/68H01G9/035H01G9/145C07C31/30C07C69/708
Inventor 原鲜霞闻一婵薛瑄武
Owner SHANGHAI JIAO TONG UNIV
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