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Electrode body, electrolytic capacitor provided with electrode body, and method for producing electrode body

An electrolytic capacitor and electrode body technology, applied in the field of electrode bodies, can solve the problem of limited surface expansion of cathode foil, and achieve the effect of high electrostatic capacitance and stable electrostatic capacitance.

Pending Publication Date: 2021-12-14
NIPPON CHIMI CON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The surface area of ​​the cathode foil is also increased by etching, but from the viewpoint of the thickness of the cathode foil, there is a limit to the expansion of the cathode foil

Method used

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  • Electrode body, electrolytic capacitor provided with electrode body, and method for producing electrode body
  • Electrode body, electrolytic capacitor provided with electrode body, and method for producing electrode body
  • Electrode body, electrolytic capacitor provided with electrode body, and method for producing electrode body

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Embodiment

[0063] Hereinafter, the present invention will be described in more detail based on examples. In addition, this invention is not limited to a following Example. First, the electrolytic capacitors of each of the Examples, each of the Reference Examples, and Comparative Example 1 were produced in the following manner based on the embodiment of the lamination unit.

[0064] The general procedure for making electrolytic capacitors is as follows. First, regarding the cathode body, a carbon material was added to a CMC-Na aqueous solution as an aqueous solution containing a dispersant. The aqueous solution containing the dispersant contained 1.67 wt% of CMC-Na relative to the entire aqueous solution excluding the carbon material. After adding the carbon material, as a dispersion process, the aqueous solution was stirred for 3 minutes at 2000 rpm using a mixer (defoaming and stirring Taro, Xinji (Thinky) Co., Ltd.), and then the mixer (defoaming and stirring Taro, Xinji (Thinky) Co....

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Abstract

Provided are: an electrode body capable of stably expressing not only the initial capacitance of an electrolytic capacitor but also the capacitance after a high-temperature environmental load is applied; and an electrolytic capacitor provided with this electrode body. This electrode body, which is used for a negative electrode of an electrolytic capacitor, is provided with a negative electrode foil made of a valve action metal and a carbon layer formed on the negative electrode foil. The carbon layer includes a first spherical carbon and a second spherical carbon. The first spherical carbon has a larger BET specific surface area than the second spherical carbon, and the second spherical carbon has a smaller BET specific surface area than the first spherical carbon.

Description

technical field [0001] The present invention relates to an electrode body, an electrolytic capacitor including the electrode body, and a method for manufacturing the electrode body. Background technique [0002] An electrolytic capacitor includes a valve metal such as tantalum or aluminum as an anode foil and a cathode foil. The anode foil is enlarged by making a valve metal into a shape such as a sintered body or an etched foil, and has a dielectric oxide film layer on the enlarged surface. The electrolyte is interposed between the anode foil and the cathode foil. The electrolyte is in close contact with the uneven surface of the anode foil and functions as a true cathode. The electrolytic capacitor obtains the capacitance on the anode side through the dielectric polarization of the dielectric oxide film layer. [0003] An electrolytic capacitor can be viewed as a series capacitor exhibiting capacitance on the anode side as well as on the cathode side. Therefore, in ord...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/04H01G9/042
CPCH01G9/04H01G9/042H01G9/145H01G9/048H01G9/151H01G9/0425H01G9/15H01G9/0029
Inventor 小关良弥大仓数马长原和宏
Owner NIPPON CHIMI CON CORP
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