METHOD FOR MANUFACTURING ALUMINUM ELECTROLYTIC CAPACITOR ELECTRODE

Title:

METHOD FOR MANUFACTURING ALUMINUM ELECTROLYTIC CAPACITOR ELECTRODE

Document Type and Number:

WIPO Patent Application WO/2017/098771

Kind Code:

A1

Abstract:

An electrolytic capacitor anode is manufactured through formation of an aluminum electrode in which a porous layer comprising a sintered layer of aluminum powder having an average particle size of 1 μm to 10 μm is laminated on a surface of an aluminum core material to a thickness of 150 μm to 3000 μm. In this case, after a pure water boil step and before a formation step, an organic acid immersion step is performed in which the aluminum electrode is immersed in an organic acid aqueous solution including, e.g., dodecanoic acid, benzoic acid, propanedioic acid, butanedioic acid, (E)-2-butenedioic acid, 2-hydroxypropane-1,2,3-tricarboxylic acid, and (E)-1-propene-1,2,3-tricarboxylic acid. In the formation step, a phosphoric acid immersion step is performed at least once in which the aluminum electrode is immersed in an aqueous solution including a phosphoric ion in the course of a film withstand voltage rising to a formation voltage.

Inventors:

SHIMIZU YUTA (JP)
YOSHIDA YUYA (JP)
KATANO MASAHIKO (JP)
SONE SHINYA (JP)
MEHATA MASASHI (JP)
TAIRA TOSHIFUMI (JP)

Application Number:

PCT/JP2016/077697

Publication Date:

June 15, 2017

Filing Date:

September 20, 2016

Export Citation:

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Assignee:

NIPPON LIGHT METAL CO (JP)

International Classes:

H01G9/00; H01G9/04; H01G9/055

Foreign References:

JP2014057000A	2014-03-27
JPS6035513A	1985-02-23
JPH06275473A	1994-09-30
JPS5989796A	1984-05-24
JP2004253755A	2004-09-09

Other References: