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公开(公告)号：US11929214B2
公开(公告)日：2024-03-12
申请号：US17786143
申请日：2020-12-15
发明人： Kazuya Koseki , Kazuhiro Nagahara , Kenji Machida
CPC分类号： H01G9/028 , H01G9/0032 , H01G9/055
摘要： Provided is a hybrid electrolytic capacitor having large capacitance, low ESR, and superior high-frequency characteristics and high-temperature endurance. The hybrid electrolytic capacitor 1 is provided with: a cathode 10 having a cathode substrate 11 made of a valve metal, an oxide layer 12 provided on a surface of the cathode substrate 11, an inorganic conductive layer 13 provided on a surface of the oxide layer 12 and including an inorganic conductive material, and an organic conductive layer 14 provided on a surface of the inorganic conductive layer 13 and including a conductive polymer; an anode 20 having an anode substrate 21 made of a valve metal and a dielectric layer 22 provided on a surface of the anode substrate 21; and a composite electrolyte layer 30 having a solid electrolyte layer 31 containing conductive polymer particles 31a which is provided between and in contact with the organic conductive layer 14 of the cathode 10 and the dielectric layer 22 of the anode 20, and an electrolytic solution 32 filled between the conductive polymer particles 31a in the solid electrolyte layer 31.
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公开(公告)号：US11348738B2
公开(公告)日：2022-05-31
申请号：US16650565
申请日：2018-10-02
发明人： Kazuya Koseki , Kazuhiro Nagahara , Kenji Machida
摘要： Provided is an electrolytic capacitor that can reliably exhibit redox capacity due to a conductive polymer layer of a cathode. The electrolytic capacitor includes: a cathode having a conductive substrate and a conductive polymer layer placed on the surface of the conductive substrate; an anode having a substrate composed of a valve metal and a dielectric layer composed of an oxide of the valve metal that is placed on the surface of the substrate, the anode being disposed such that the dielectric layer and the conductive polymer layer of the cathode are opposed to each other across a space; and an ion conductive electrolyte with which the space is filled, the conductive polymer layer of the cathode that is in contact with the ion conductive electrolyte exhibiting a redox capacity due to application of a voltage between the anode and the cathode, wherein the contact resistance between the conductive substrate and the conductive polymer layer in the cathode is 1 Ωcm2 or less.
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3.发明公开公开(公告)号：US20230360862A1
公开(公告)日：2023-11-09
申请号：US18224389
申请日：2023-07-20
发明人： Kazuya Koseki , Kazuma Okura , Kazuhiro Nagahara , Kenji Machida
CPC分类号： H01G9/0425 , H01G9/055 , H01G9/042
摘要： Provided is an electrode body that exhibits a good cathode side capacitance, and an electrolytic capacitor provided with this electrode body. The electrode body used for a cathode of the electrolytic capacitor has a cathode foil and a carbon layer. The cathode foil is made of a valve acting metal, and an enlarged surface layer is formed on the surface thereof. The carbon layer is formed on the enlarged surface layer. The interface between the enlarged surface layer and the carbon layer has an uneven shape.
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公开(公告)号：US10115529B2
公开(公告)日：2018-10-30
申请号：US15217798
申请日：2016-07-22
发明人： Kazuya Koseki , Masao Sakakura
摘要： The present invention provides solid electrolytic capacitor with excellent properties in high-voltage application of 80V or more and a manufacturing method thereof. The solid electrolytic capacitor is manufactured by: forming, in a capacitor element with an anode electrode foil and a cathode electrode foil wound with an interposed separator, a solid electrolyte layer by using a conductive polymer dispersion in which particles of a conductive polymer dispersed in a solvent; and filling voids inside the capacitor element in which the solid electrolyte layer has been formed with an electrolytic solution containing less than 9 wt % of a salt of a composite compound of inorganic acid and organic acid as a solute for filling.
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公开(公告)号：US20160336117A1
公开(公告)日：2016-11-17
申请号：US15217798
申请日：2016-07-22
发明人： Kazuya Koseki , Masao Sakakura
摘要： The present invention provides solid electrolytic capacitor with excellent properties in high-voltage application of 80V or more and a manufacturing method thereof. The solid electrolytic capacitor is manufactured by: forming, in a capacitor element with an anode electrode foil and a cathode electrode foil wound with an interposed separator, a solid electrolyte layer by using a conductive polymer dispersion in which particles of a conductive polymer dispersed in a solvent; and filling voids inside the capacitor element in which the solid electrolyte layer has been formed with an electrolytic solution containing less than 9 wt % of a salt of a composite compound of inorganic acid and organic acid as a solute for filling.
摘要翻译： 本发明提供了在80V以上的高压施加下具有优异性能的固体电解电容器及其制造方法。 固体电解电容器通过以下方式制造：在具有阳极电极箔的电容器元件和缠绕有隔离件的阴极电极箔上形成固体电解质层，其中使用导电聚合物分散体，其中导电聚合物的颗粒分散在 溶剂; 并且在其中形成固体电解质层的电容器元件内填充空隙，其中所述电解质溶液含有少于9重量％的无机酸和有机酸的复合化合物的盐作为填充溶质的盐的电解液。
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公开(公告)号：US09972445B2
公开(公告)日：2018-05-15
申请号：US14744932
申请日：2015-06-19
摘要： Provided are an electrolytic capacitor with high withstand voltage capable of preventing deterioration of withstand voltage characteristics caused by lead-free reflow or the like and improving ESR characteristics, and a manufacturing method thereof. The electrolytic capacitor is obtained by impregnating a capacitor element in which an anode electrode foil and a cathode electrode foil are wound with a separator interposed, with a dispersion containing: particles of a conductive polymer; sorbitol or sorbitol and polyalcohol; and a solvent so as to form a solid electrolyte layer containing 60 to 92 wt % of the sorbitol or the sorbitol and polyalcohol, and by filling an electrolytic solution containing ethylene glycol in a gap portion in the capacitor element on which the solid electrolyte layer is formed.
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7.发明公开公开(公告)号：US20240290550A1
公开(公告)日：2024-08-29
申请号：US18572685
申请日：2022-06-21
发明人： Kazuya Koseki , Kazuma Okura , Kazuhiro Nagahara
CPC分类号： H01G9/0425 , H01G9/0029 , H01G9/045 , H01G9/07 , H01G9/028 , H01G9/035
摘要： An electrolytic capacitor that can suppress a decrease over time of capacity, a cathode body included in the electrolytic capacitor, and a production method of the electrolytic capacitor are provided. The electrolytic capacitor includes an anode foil, a cathode body, and electrolytic solution. The anode foil is formed of valve metal and has dielectric oxide film formed on a surface of the foil. The cathode body includes cathode foil formed of valve metal and a carbon layer laminated on the cathode foil. An interfacial resistance between the cathode foil and the carbon layer is 1.8 mΩ·cm2 or less.
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公开(公告)号：US12009158B2
公开(公告)日：2024-06-11
申请号：US17786082
申请日：2020-12-15
发明人： Kazuya Koseki , Kazuhiro Nagahara , Kazuma Okura
CPC分类号： H01G9/15 , H01G9/0029 , H01G9/0425 , H01G9/055
摘要： Provided is a solid electrolytic capacitor having large capacitance, low ESR, and superior high-frequency characteristics and high-temperature endurance. The solid electrolytic capacitor is provided with: a cathode 10 having a cathode substrate 11 made of a valve metal and having an etching pit 11a; an oxide layer 12 made of an oxide of the valve metal provided on a surface of the cathode substrate 11, and a carbon coating layer 13 provided on a surface of the oxide layer 12, the carbon coating layer 13 including carbon particles and having an entry area 13a that enters the etching pit 11a and a penetration area 13b that penetrates through the oxide layer 12 and conducts with the cathode substrate 11; an anode having an anode substrate made of a valve metal, and a dielectric layer provided on a surface of the anode substrate and made of an oxide of the valve metal that composes the anode substrate; and a solid electrolyte layer including a conductive polymer provided between the carbon coating layer of the cathode and the dielectric layer of the anode.
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公开(公告)号：US11948755B2
公开(公告)日：2024-04-02
申请号：US17614088
申请日：2020-06-12
发明人： Kazuya Koseki , Kazuma Okura , Kazuhiro Nagahara
CPC分类号： H01G9/042 , H01G9/0029
摘要： An electrode body which achieves not only high initial capacitance of an electrolyte capacitor but also achieves stable capacitance even after being exposed to high temperature environment, and the electrolyte capacitor including the electrode body are provided. The electrode body is used for a negative electrode of the electrolyte capacitor, and the electrode body includes a negative electrode foil formed by 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, and the first spherical carbon has a BET specific surface area larger than the second spherical carbon.
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10.发明授权公开(公告)号：US11756740B2
公开(公告)日：2023-09-12
申请号：US17057545
申请日：2019-06-07
发明人： Kazuya Koseki , Kazuma Okura , Kazuhiro Nagahara , Kenji Machida
CPC分类号： H01G9/0425 , H01G9/042 , H01G9/055
摘要： Provided is an electrode body that exhibits a good cathode side capacitance, and an electrolytic capacitor provided with this electrode body. The electrode body used for a cathode of the electrolytic capacitor has a cathode foil and a carbon layer. The cathode foil is made of a valve acting metal, and an enlarged surface layer is formed on the surface thereof. The carbon layer is formed on the enlarged surface layer. The interface between the enlarged surface layer and the carbon layer has an uneven shape.
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