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Compound cathode foil and solid electrolytic capacitor comprising same

A composite cathode and solid-state electrolysis technology, applied in the field of electrode foil, can solve the problems of poor mass production efficiency and long time, and achieve good compatibility and bonding, excellent high temperature oxidation resistance, high wear resistance and adhesion sexual effect

Active Publication Date: 2010-06-23
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this manufacturing method, the coated plate must be placed in an atmosphere containing methane or acetylene at a high temperature of 440-660°C for a long time of more than 10 hours, because the preparation process is lengthy and contains flammable gases. The high-temperature heating preparation process must have specially designed equipment to ensure safety, resulting in poor mass production efficiency

Method used

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  • Compound cathode foil and solid electrolytic capacitor comprising same
  • Compound cathode foil and solid electrolytic capacitor comprising same
  • Compound cathode foil and solid electrolytic capacitor comprising same

Examples

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Embodiment 1

[0026] In this embodiment, the cathodic arc plasma (cathode arc plasma) coating method is used. The flat aluminum foil is used as the substrate, and titanium and graphite are used as the target materials. During the preparation process, inert gas and hydrocarbons (Hydrocarbon) are introduced. gas. Under the condition of 20 ~ 100 ℃, the pressure of the preparation process is set to 10 -4 ~2Pa, and apply a bias voltage of 0V~-500V. First, a titanium metal layer is grown on a flat aluminum substrate. Next, a titanium carbide layer is grown on the titanium metal layer. Finally, a carbon layer is grown on the titanium carbide layer to complete a composite electrode structure of aluminum / titanium / titanium carbide / carbon. The thickness of the carbon layer in the composite structure is about 288nm, and the thickness of the titanium metal layer and the titanium carbide layer is about 10-100nm.

[0027] Preparation of solid electrolytic capacitor of the present invention

[0028] T...

Embodiment 2

[0030] As in Example 1, but using zirconium instead of titanium as the metal target to complete a composite electrode structure of aluminum / zirconium / zirconium carbide / carbon, the thickness of the coating in this composite structure is about 430nm, and the zirconium metal layer and zirconium carbide The thickness of the layer is about 10 to 100 nm.

[0031] The preparation method of the solid electrolytic capacitor is the same as that in Example 1, but the aluminum / zirconium / zirconium carbide / carbon composite structure is used instead as the cathode foil. The results of its equivalent series resistance (ESR) characteristics are listed in Table 2.

Embodiment 3

[0033] As in Example 1, but using chromium instead of titanium as the metal target to complete a composite electrode structure of aluminum / chromium / chromium carbide / carbon, the thickness of the coating in this composite structure is about 430nm, and the chromium metal layer and chromium carbide The thickness of the layer is about 10 to 100 nm.

[0034] The preparation method of the solid electrolytic capacitor is the same as that of Example 1, but the composite structure of aluminum / chromium / chromium carbide / carbon is used as the cathode foil. The measured capacitance results of the solid electrolytic capacitor are listed in Table 1.

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Abstract

The invention provides a compound cathode foil comprising an aluminum base material, a metal layer, a metallic carbide layer and a carbon layer, wherein the metal layer is formed on the aluminum base material, and metal is selected from a class composed of the free IVB group elements, the VB group elements and the VIB group elements; the metallic carbide layer is formed on the metal layer; and the carbon layer is formed on the metallic carbide layer. The invention also provides a solid electrolytic capacitor comprising the compound cathode foil.

Description

technical field [0001] The invention relates to an electrode foil, in particular to a composite cathode foil and a solid electrolytic capacitor comprising the composite cathode foil. Background technique [0002] The solid electrolyte used as the cathode in solid electrolytic capacitors can use, for example, MnO 2 Semiconductor oxides, organic semiconductors of TCNQ or conductive polymers including polyaniline, polypyrrole, polythiophene or their derivatives, wherein the conductive polymer poly 3,4-ethylenedioxythiophene (poly(3,4-ethylenedioxy thiophene), PEDOT) is the most widely used because of its high conductivity and stability. Conductive polymer solid electrolytes are formed by impregnating elements in a solution containing monomers and oxidants to produce a chemical polymerization reaction, or by impregnating elements in a solution containing monomers and electrolytes to generate Polymerization reaction forms a conductive polymer layer inside the element. The cond...

Claims

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Application Information

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IPC IPC(8): H01G9/04H01G9/15H01G9/14
Inventor 黄震宇吴金宝蔡丽端吕明生
Owner IND TECH RES INST
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