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Patent
Nippon Kodoshi Corporation and Toyota Jidosha Kabushiki Kaisha | Date: 2016-03-09

A fuel cell includes an anode that is supplied with a gas containing an anode active material for being oxidized, a cathode that is supplied with a liquid containing a nonvolatile cathode active material for being reduced, and an electrolyte membrane that separates the anode and the cathode, and the electrolyte membrane comprises an inorganic/organic hybrid compound that is formed by chemical bonding of polyvinyl alcohol with an inorganic compound including at least one compound selected from the group consisting of silicic acid compounds, a tungstic acid compounds, and zirconic acid compounds.


There is provided separator for an aluminum electrolytic capacitor constituted by a porous cellulose film having excellent impedance characteristics and short-circuit resistance characteristics, and an aluminum electrolytic capacitor using said separator. Here, the porous cellulose film is made of dissolved and regenerated cellulose without forming a cellulose derivative. The regenerated cellulose is obtained by forming in a film form a cellulose solvent obtained by dissolving cellulose in an amino oxide solvent, immersing the resulting cellulose solvent in water or a poor solvent of the amino oxide solvent so as to coagulate and regenerate the cellulose, removing the cellulose from the amino oxide solvent, and drying the resulting cellulose.


Patent
Nippon Kodoshi Corporation | Date: 2014-12-10

Provided is a separator for an alkaline battery, capable of suppressing reduction in the characteristics of the alkaline battery after storage. The separator for an alkaline battery is interposed between the cathode and anode of the alkaline battery, is used to isolate the active material of both electrodes, and is configured by including 20 - 90 mass% cellulose fiber and having the remainder being an alkali-resistance synthetic fiber. The cellulose fiber includes a dissolving pulp.


Patent
Nippon Kodoshi Corporation | Date: 2014-09-17

A cellulose solution obtained by dissolving cellulose in an amine oxide solvent is formed in a film form, and the resulting cellulose solution is immersed in water or a poor solvent of the amine oxide solvent, so as to coagulate and regenerate the cellulose. The regenerated cellulose is washed with water to remove the amine oxide solvent, and then dried, thereby obtaining a cellulose film that is thin, uniform, and dense and has few impurities. An aluminum electrolytic capacitor, which has been down-sized and/or capacity enlarged, can be constructed by interleaving the obtained cellulose film as a separator between an anode aluminum foil and a cathode aluminum foil and winding them into a capacitor element, immersing the capacitor element in liquid electrolyte so as to impregnate it with the electrolyte, placing it in a case, and then sealing it closed and aging it.


Patent
Nippon Kodoshi Corporation | Date: 2016-06-16

A separator for a capacitor includes a porous film made of cellulose dissolved and regenerated without forming a cellulose derivative (A) and a fibrous component (B). The separator has excellent impedance characteristics and short-circuit resistance characteristics. The regenerated cellulose (A) can be obtained by forming in a film form a cellulose solution made by dissolving cellulose in an amine oxide solvent, immersing the resulting cellulose solution in water or a poor solvent of the amine oxide solvent so as to coagulate and regenerate the cellulose, washing the regenerated cellulose with water to remove the amine oxide solvent, and drying the resulting cellulose. Moreover, the fibrous component (B) can be one or more kinds of fibers selected from among a plant-based pulp, regenerated cellulose fiber, cellulose fiber, animal fiber, inorganic fiber, and synthetic fiber that are available as paper raw material.


There is provided a low-cost alkaline storage battery separator capable of implementing stable fiber spinning and excellent ammonia trapping function so as to control self-discharge. Spinning fiber using resin including 1.0 mass % or greater of low crystalline polyolefin, crystalline polyolefin and maleic anhydride-modified polyolefin corresponding to a maleic anhydride component content of 3.5 to 35 mass % in the fiber assures stability during fiber spinning. Moreover, making a nonwoven fabric using the fiber act as a separator allows a high level of ammonia trapping function and controls self-discharge of the alkaline storage battery.


Patent
Nippon Kodoshi Corporation | Date: 2013-08-08

A method of forming a battery separator to be sandwiched between a positive and a negative electrode of a battery is discussed. A polyethylene resin surface is formed on a surface of a nonwoven fabric, which is made of polypropylene resin as a main component material and structured with bonded pieces of the polypropylene resin. The polyethylene resin surface is then subjected to a hydrophilization treatment, such as a radical reaction treatment or a sulfonation treatment. As a result, a secondary battery separator having a high mechanical strength along with a high hydrophilic nature, and a secondary battery using that secondary battery separator are provided.


Patent
Nippon Kodoshi Corporation | Date: 2016-10-26

There is provided a separator for a capacitor constituted by a porous film made of cellulose dissolved and regenerated without forming a cellulose derivative (A) and a fibrous component (B), and having excellent impedance characteristics and short-circuit resistance characteristics. The regenerated cellulose (A) is obtained by forming in a film form a cellulose solution made by dissolving cellulose in an amine oxide solvent, immersing the resulting cellulose solution in water or a poor solvent of the amine oxide solvent so as to coagulate and regenerate the cellulose, washing the regenerated cellulose with water to remove the amine oxide solvent, and drying the resulting cellulose. Moreover, the fibrous component (B) is one or more kinds of fibers selected from among a plant-based pulp, regenerated cellulose fiber, cellulose fiber, animal fiber, inorganic fiber, and synthetic fiber that are available as paper raw material.


Patent
Sei Corporation and Nippon Kodoshi Corporation | Date: 2015-01-07

The present invention provides an electrolyte holder for a lithium secondary battery capable of holding an electrolytic solution inside electrodes or at an interface between the separator and each of the electrodes, preventing electrolyte shortage inside the electrodes, and restraining dendrite from precipitating and growing and also provide the lithium secondary battery, using the electrolyte holder, which is capable of achieving a cycle life to such an extent that the lithium secondary battery can be used for industrial application. An electrolyte holder (3) for use in the lithium secondary battery consists of a multi-layer structure having at least two hydrophilic fibrous layers (A, B) having different porosities. The electrolyte holder (3)is composed of an electrode group formed by winding a cathode (2) and an anode (1) or laminating the cathode (2) and the anode (1) one upon another with an electrolyte holder (3) serving as a separator interposed between the cathode (2) and the anode (1). The organic electrolytic solution is permeated into the electrode group or the electrode group is immersed in the organic electrolytic solution. A porosity (40% to 80%) of the fibrous layer (A) disposed at an interface between the fibrous layer (A) and the anode (1) is set smaller than a porosity (60% to 90%) of the fibrous layer (B) disposed at an interface between the fibrous layer (B) and the cathode (2). An average porosity of the entire fibrous layer is set to not less than 50%. The fibrous layers are formed by using cellulose fibers as a main material thereof. An active substance for use in the anode (1) is a carbon material.


Patent
Nippon Kodoshi Corporation | Date: 2015-06-19

A separator is provided for an aluminum electrolytic capacitor includes a porous cellulose film having excellent impedance characteristics and short-circuit resistance characteristics, and an aluminum electrolytic capacitor is also provided using the separator. The porous cellulose film is formed of dissolved and regenerated cellulose without forming a cellulose derivative. The regenerated cellulose is obtained by forming in a film form a cellulose solvent obtained by dissolving cellulose in an amino oxide solvent, immersing the resulting cellulose solvent in water or a poor solvent of the amino oxide solvent so as to coagulate and regenerate the cellulose, removing the cellulose from the amino oxide solvent, and drying the resulting cellulose.

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