Aluminum electrolytic capacitor electrolyte and aluminum electrolytic capacitor

An aluminum electrolytic capacitor and electrolyte technology, which is applied in the field of electrochemistry, can solve the problems of large changes in the conductivity of the linear carboxylate system, affecting the low temperature performance of the capacitor, and low flash voltage of the electrolyte, so as to improve the characteristics of the capacitor and achieve high Flash voltage, good solubility effect

Active Publication Date: 2012-12-26
SHENZHEN CAPCHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (2) Straight-chain carboxylate + ethylene glycol system: The electrolyte containing straight-chain saturated dicarboxylic acids such as azelaic acid, sebacic acid, dodecanedioic acid or their salts is used as the electrolyte. This is the current domestic Widely used system, but the linear carboxylate has crystallization phenomenon at low temperature, which affects the low temperature performance of the capacitor, and the conductivity of the linear carboxylate system changes greatly, and the loss of the capacitor changes greatly. These problems restrict Further improvement in capacitor performance
However, the electrolyte flashover voltage is not high

Method used

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  • Aluminum electrolytic capacitor electrolyte and aluminum electrolytic capacitor
  • Aluminum electrolytic capacitor electrolyte and aluminum electrolytic capacitor
  • Aluminum electrolytic capacitor electrolyte and aluminum electrolytic capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Dissolve 2-hexyladipic acid and its ammonium salt (5%, that is, account for 5% of the total weight of the electrolyte, and the following examples will not repeat the similar expressions) in ethylene glycol to form a solution, and then add the Nitrobenzoic acid (0.2%) and hypophosphorous acid (0.2%) are sealed in a stainless steel bottle and kept at a constant temperature of 105°C.

Embodiment 2

[0032] Dissolve 2-hexyladipic acid and its ammonium salt (2.5%) in ethylene glycol to form a solution, then add ammonium sebacate (2.5%), p-nitrobenzyl alcohol (0.1%) and hypophosphorous acid (0.1% ), sealed in a stainless steel bottle, and kept at a constant temperature of 105°C.

Embodiment 3

[0034] Dissolve 2-hexyladipic acid and its ammonium salt (4%) in ethylene glycol to form a solution, then add ammonium azelate (1%), m-nitroacetophenone (0.5%) and hypophosphorous acid (0.1 %), sealed in a stainless steel bottle, and kept at a constant temperature of 105°C.

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Abstract

The invention aims at providing aluminum electrolytic capacitor electrolyte with excellent heat stability. Meanwhile the invention also provides an aluminum electrolytic capacitor prepared by the electrolyte. The electrolyte comprises following components of organic solvent and 2-hexyl ammonium adipate or combination of 2-hexyl ammonium adipate and ammonium salt of the 2-hexyl ammonium adipate. The electrolyte has better heat stability.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to an electrolytic solution of an aluminum electrolytic capacitor and an aluminum electrolytic capacitor. Background technique [0002] A capacitor is an energy storage element used in circuits for tuning, filtering, coupling, bypassing, energy conversion, and time delay. Aluminum electrolytic capacitors are characterized by large capacity, but large leakage, large errors, and poor stability. They are often used for AC bypass and filtering, and are also used for signal coupling when the requirements are not high. The typical structure of an aluminum electrolytic capacitor is an aluminum cylinder as the negative electrode, which contains a liquid electrolyte, and a curved aluminum strip is inserted as the positive electrode. Its core is made of anode aluminum foil, liner paper impregnated with electrolyte, cathode aluminum foil, natural oxide film, etc., and the core is impregnated w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/035H01G9/145
CPCH01G9/145H01G9/035
Inventor 郑仲天何天虔陈长春
Owner SHENZHEN CAPCHEM TECH
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