Electrochemical polymerization solution for preparing solid electrolyte layer for solid electrolytic capacitor

A solid electrolyte layer, solid electrolysis technology, applied in capacitor electrolyte/absorber, capacitor parts and other directions, can solve the problems of poor performance and high ESR, and achieve the effects of reduced ESR, increased reliability and high conductivity

Inactive Publication Date: 2014-09-24
FUJIAN GUOGUANG ELECTRONICS SCI & TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an electrochemical polymerization solution for preparing a solid electrolyte layer in a solid electrolytic capacitor, so as to solve the problem of high ESR of solid electrolytic capacitor products and poor performance under high temperature storage conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] After the 4VF aluminum foil containing alumina (effective area 3.5mm×4.0mm) is prepared by chemical polymerization to prepare the first solid electrolyte layer polypyrrole, then the electrochemical polymerization process is carried out. Specifically, the aluminum foil containing the first solid electrolyte layer polypyrrole is combined with The external electrode is connected as an anode, and stainless steel is used as a cathode, and electrochemical polymerization is carried out in an aqueous solution containing 0.4M pyrrole monomer, 0.3M p-toluenesulfonic acid electrolyte, 0.5% maleic acid, and the current density is 3mA / cm 2 , the time is 100 minutes, and then washed and dried to obtain the second solid electrolyte layer polypyrrole. A carbon-containing cathode layer and a silver-containing cathode layer are sequentially formed on the outer surface of the second solid electrolyte layer; a monolithic capacitor element is obtained, and the monolithic capacitor element is...

Embodiment 2

[0022] The difference from Example 1 is that the weak organic acid is 0.1% maleic acid.

Embodiment 3

[0024] The difference from Example 1 is that the weak organic acid is 1% citric acid.

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PUM

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Abstract

The invention provides electrochemical polymerization solution for preparing a solid electrolyte layer for a solid electrolytic capacitor. The electrochemical polymerization solution comprises a conductive macromolecule monomer, a doping agent, a solvent and weak organic acid, wherein the weak organic acid is one or combination of citric acid, adipic acid, maleic acid, fumaric acid, tartaric acid, succinic acid, malic acid or gluconic acid, the content being 0.1-1% of the total mass of the electrochemical polymerization solution. According to the electrochemical polymerization solution, ESR of the solid electrolytic capacitor products can be reduced, and reliability level of the solid electrolytic capacitor can be improved.

Description

technical field [0001] The invention relates to an electrochemical polymerization solution for preparing a solid electrolyte layer for a solid electrolytic capacitor. Background technique [0002] In recent years, with the continuous development of electronic technology, the market demand for electrolytic capacitors gradually tends to miniaturization, large capacity, low ESR (equivalent series resistance) and high reliability. Using conductive polymers as electrolytes can well avoid performance instability caused by liquid electrolyte leakage. At present, the preparation process of solid electrolytic capacitors using conductive polymer electrolytes is mainly to form a conductive polymer film on the surface of the valve metal oxide film by chemical polymerization or electrochemical polymerization, and then coat graphite and silver paste on the cathode part in turn, and lead out the anode respectively. And the cathode to form a capacitor core; finally encapsulate the capacito...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/028C08G73/06
CPCY02E60/13
Inventor 张易宁陈巧琳林俊鸿陈远强王国平何腾云葛宝全
Owner FUJIAN GUOGUANG ELECTRONICS SCI & TECHCO
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