Electrolytic capacitor and method for producing same
US-12136525-B2 · Nov 5, 2024 · US
Electrolytic solution for electrolytic capacitor
US9111685B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9111685-B2 |
| Application number | US-201113636966-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 25, 2011 |
| Priority date | Mar 26, 2010 |
| Publication date | Aug 18, 2015 |
| Grant date | Aug 18, 2015 |
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Abstract
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A hydrophobic film is formed on the electrode foil surface by adding a straight-chain saturated dicarboxylic acid represented by the general formula: HOOC(CH 2 ) n COOH (wherein n indicates an integer from 9 to 11) to the electrolytic solution for medium/high-voltage electrolytic capacitor. Addition of a large amount of water to the electrolytic solution is allowed since this hydrophobic film suppresses the hydration reaction between the electrode foil and water. Further, it is possible to retain good lifespan property of the electrolytic capacitor in a medium/high-voltage electrolytic solution by having low specific resistance property and by suppressing the hydration decomposition of the electrode foil, wherein the electrolytic solution is azelaic acid, sebacic acid, 1-methyl-azelaic acid, 1,6-decanedicarboxylic acid, or a salt thereof dissolved in a solvent having ethylene glycol as the main component.
First claim
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The invention claimed is: 1. An electrolytic solution for electrolytic capacitor, wherein at least one of azelaic acid, sebacic acid, 1-methyl-azelaic acid, 1,6-decanedicarboxylic acid, and a salt thereof is dissolved as a solute in ethylene glycol and 15-50 wt % of the total electrolytic solution of water, a straight-chain saturated dicarboxylic acid represented by general formula (1) is added for forming a hydrophobic film on an electrode foil: HOOC(CH 2 ) n COOH (1) where…
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- H01G9/035Primary
Electricity · mapped topic
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- What does patent US9111685B2 cover?
- A hydrophobic film is formed on the electrode foil surface by adding a straight-chain saturated dicarboxylic acid represented by the general formula: HOOC(CH 2 ) n COOH (wherein n indicates an integer from 9 to 11) to the electrolytic solution for medium/high-voltage electrolytic capacitor. Addition of a large amount of water to the electrolytic solution is allowed since this hydrophobic film s…
- Who is the assignee on this patent?
- Kawakami Junichi, Sakakura Masao, Ozawa Masashi, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification H01G9/035. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 18 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).