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Solid electrolytic capacitor

A technology of solid electrolysis and capacitors, applied in the direction of solid electrolytic capacitors, electrolytic capacitors, capacitors, etc., can solve the problems of inability to achieve high withstand voltage, narrow application range of solid electrolytic capacitors, and inability to achieve high-capacity capacitor miniaturization, etc. Effects of low ESR, high capacity ESR, and high withstand voltage

Active Publication Date: 2012-05-23
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even so, since the same high withstand voltage as electrolytic capacitors cannot be achieved, etc., the range of use of solid electrolytic capacitors is narrow
In addition, solid electrolytic capacitors also have the same problems as electrolytic capacitors, that is, the problem that the capacity of the capacitor cannot be increased and the parts cannot be miniaturized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～11、19、22、23、25、27

[0165] The multilayer nonwoven fabrics of Examples 1 to 11 were produced by the following method, and performance evaluation was implemented.

[0166] A nonwoven fabric layer (layer II) made of thermoplastic resin fibers is formed. Specifically, a solution of general-purpose PET (as a thermoplastic resin) (using OCP as a solvent, having a solution viscosity measured at a temperature of 35°C: ηsp / c=0.67) Viscosity tube measurement. Same as below.) By spunbonding method, at a spinning temperature of 300°C, the filament group was extruded toward the moving collecting net surface, and spinning was performed at a spinning speed of 4500m / min. Next, the filament group is sufficiently opened by corona charging with an electric charge of about 3 μC / g, and a long-fiber thermoplastic resin sheet is formed on the collecting net. The adjustment of fiber diameter is carried out by changing the drawing conditions.

[0167] Next, as the ultrafine fiber nonwoven fabric layer (layer I), using...

Embodiment 12、13、20、21、24、26

[0172] Unlike Examples 1-11, the same conditions as Examples 1-11 were used except the multilayer nonwoven fabric of a 2-layer structure (II layer and I layer). The conditions for forming a multilayer nonwoven fabric and the properties thereof are shown in Tables 1-2 and Tables 4-5, respectively. In addition, the capacitor performance is shown in Tables 7-8.

Embodiment 14

[0174] As the thermoplastic resin, PPS (Fortron manufactured by Polyplastics Corporation) was used. The conditions for forming a nonwoven fabric are as follows.

[0175] Layer II: Melt viscosity of resin: 70 g / 10 minutes (measured using a capillary rheometer, measurement conditions: load 5 kg, temperature 315.6° C.), spinning temperature: 320° C., spinning speed: 8000 m / min.

[0176] Layer I: melt viscosity of resin: 670g / 10min (measured by the same method as above, measurement conditions: load 5kg, temperature 315.6°C), spinning temperature: 340°C, heating air temperature: 390°C, heating air volume: 1000Nm 3 / hr / m.

[0177] In addition, the thermal bonding conditions using a flat roll are: line pressure: 260N / cm, roll temperature: up / down = 170°C / 170°C; calendering conditions are: line pressure: 350N / cm, roll temperature: up / down = 235°C / 235°C. The conditions for forming the multilayer nonwoven fabric and its properties are shown in Table 1 and Table 4, respectively. Oth...

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Abstract

Provided is a high-performance solid electrolytic capacitor that can be produced with stability. The solid electrolytic capacitor is a capacitor comprising an anode foil, a cathode foil, and separators arranged between the anode foil and the cathode foil. The anode foil, the cathode foil, and the separators are wound around so as to have the separator intervene between the anode foil and the cathode foil. The anode foil has a dielectric oxide-film layer, and the separators comprise a solid electrolyte and a nonwoven fabric that holds the solid electrolyte. The nonwoven fabric, which composes the separator, is a laminated nonwoven fabric having at least two nonwoven fabric layers, and the laminated nonwoven fabric comprises: a nonwoven fabric layer (layer I) composed of extra-fine fiber with a fiber diameter of 0.1-4 [mu]m; and a nonwoven fabric layer (layer II) composed of thermoplastic resin fiber with a fiber diameter of 6-30 [mu]m.

Description

technical field [0001] The present invention relates to a solid electrolytic capacitor in which the nonwoven fabric constituting the separator is a multilayer nonwoven fabric. Background technique [0002] With the improvement of reliability and performance of electronic equipment, electrolytic capacitors with longer life and higher electrical characteristics than the present are required. As one of them, a capacitor excellent in impedance characteristics in a high-frequency range of an electronic device is required. For this purpose, a solid electrolytic capacitor having low impedance in a high-frequency range is put into practical use using a solid electrolyte with high electrical conductivity or a tetracyanoquinodimethane (tetracyanoquinodimethane) complex salt. In addition, since a solid electrolytic capacitor does not use an electrolytic solution, it is an electrical component with a long life and high reliability. Therefore, the use of solid electrolytic capacitors h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/02H01G9/028
CPCH01G9/02H01G9/151Y10T442/608H01G9/028
Inventor 加藤一史小尾留美名上野郁雄
Owner ASAHI KASEI KK
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