Patent application number | Description | Published |
20080248374 | FUEL CELL, METHOD FOR PRODUCING SAME, AND ELECTRONIC DEVICE - A fuel cell includes a positive electrode, a negative electrode, an enzyme including an oxidase that oxidizes a monosaccharide, the enzyme being immobilized on the negative electrode, an electron mediator including a compound having a naphthoquinone skeleton, the electron mediator being immobilized on the negative electrode, a coenzyme that is formed by oxidation of the monosaccharide, and a coenzyme oxidase that oxidizes the coenzyme, in which the ratio of the electron mediator to the coenzyme is in the range of 1.0 (mol):0.33 (mol) to 1.0 (mol):1.0 (mol). | 10-09-2008 |
20080280184 | FUEL CELL, METHOD FOR MANUFACTURING FUEL CELL, AND ELECTRONIC APPARATUS - A fuel cell includes a positive electrode and a negative electrode which are opposed to each other with a proton conductor provided therebetween, and an enzyme immobilized as a catalyst on at least one of the positive and negative electrodes. In the fuel cell, the positive electrode, the proton conductor, and the negative electrode are accommodated in a space formed between a positive electrode current collector having a structure permeable to an oxidizer and a negative electrode current collector having a structure permeable to fuel. | 11-13-2008 |
20090047550 | METHOD FOR MANUFACTURING FUEL CELL, FUEL CELL, AND ELECTRONIC APPARATUS - A method for manufacturing a fuel cell having a structure in which a positive electrode and a negative electrode are opposed with a proton conductor therebetween and an enzyme is immobilized on the positive electrode and/or the negative electrode includes the step of immobilizing the enzyme on the positive electrode and/or the negative electrode with a photo-curable resin and/or a thermosetting resin. A photo-curable resin and/or a thermosetting resin may be further laminated on the photo-curable resin and/or the thermosetting resin which have immobilized the enzyme. | 02-19-2009 |
20090047567 | Biofuel cell, method for producing the same, electronic apparatus, enzyme-immobilized electrode, and method for producing the same - A biofuel cell has a structure in which a cathode and an anode are opposed to each other with a electrolyte layer provided therebetween, at least one of the cathode and the anode including an electrode on which at least one enzyme and at least one electron mediator are immobilized. The concentration of the electron mediator immobilized on the electrode is at least 10 times a Michaelis constant K | 02-19-2009 |
20090155880 | MUTANT PROTEIN HAVING DIAPHORASE ACTIVITY - A mutant protein having diaphorase activity is provided. A mutant protein includes an amino acid sequence obtained by deletion, replacement, addition, or insertion of at least one amino acid residue of a native-form amino acid sequence of SEQ. ID. No. 1, wherein the mutant protein has diaphorase activity with an enzyme activity of 245 or more. | 06-18-2009 |
20100009241 | FUEL CELL AND PROCESS FOR PRODUCTION THEREOF; AND ELECTRONIC INSTRUMENT, MOBILE MACHINE, ELECTRIC POWER GENERATING SYSTEM, COGENERATION SYSTEM, AND ELECTRODE REACTION-BASED APPARATUS - A porous electroconductive material is provided. The electroconductive material enables efficient enzymatic metabolic reactions on electrodes and yields electrodes having immobilized enzymes thereon which remain stable in any working environment. The porous electroconductive material, which has a three-dimensional network structure, is formed from a skeleton of porous material and a carbonaceous material covering the surface of the skeleton. The porous material constituting the skeleton is foamed metal or alloy. This porous electroconductive material is made into an electrode, and enzymes are immobilized on this electrode. The resulting electrode with immobilized enzymes thereon is used as the anode of a bio-fuel cell. | 01-14-2010 |
20100047670 | ENZYME-IMMOBILIZED ELECTRODE, FUEL CELL, ELECTRONIC DEVICE, APPARTUS UTILIZING ENZYME REACTION, AND ENZYME-IMMOBILIZED SUBSTRATE - An enzyme-immobilized electrode is provided and includes an electrode composed of porous carbon or the like, a phospholipid layer on the electrode ( | 02-25-2010 |
20100221644 | FUEL CELL AND ELECTRONIC APPARATUS - A fuel cell is provided having excellent performance and being capable of achieving a sufficient buffer ability in a high-output operation when an enzyme is immobilized on at least one of a positive electrode and a negative electrode and of sufficiently exhibiting the ability inherent in the enzyme. A biofuel cell includes a structure in which a positive electrode and a negative electrode are opposed to each other with an electrolyte layer containing a buffer material provided therebetween, an enzyme being immobilized on at least one of the positive electrode and the negative electrode. The electrolyte layer contains as the buffer material a compound including an imidazole ring. As the compound including an imidazole ring, imidazole, 1-methylimidazole, 2-methylimidazole, 4-methylimidazole, 2-ethylimidazole, or the like is used. | 09-02-2010 |
20100248042 | FUEL CELL, MANUFACTURING METHOD THEREOF, ELECTRONIC APPARATUS, ENZYME-IMMOBILIZED ELECTRODE, MANUFACTURING METHOD THEREOF, WATER-REPELLENT AGENT, AND ENZYME IMMOBILIZING MATERIAL - In the case in which a fuel cell has a structure in which a cathode ( | 09-30-2010 |
20100310946 | NEW FUEL CELL, AND POWER SUPPLY DEVICE AND ELECTRONIC APPARATUS USING THE SAME - To provide a fuel cell that can perform efficient power generation through a simple fuel supply. There is provided a fuel cell that generates electricity through progress of an oxidation-reduction reaction using an enzyme as a catalyst, the fuel cell including at least a fuel-vaporizing layer formed through vaporization of a fuel; an anode to which a vaporized fuel is supplied from the fuel-vaporizing layer; and a cathode connected to the anode in a state in which protons can be conducted. In the fuel cell, since a fuel is supplied to an electrode in a vaporized state, a vaporized fuel is supplied to an inner portion of the electrode and a reaction sufficiently proceeds at the inner surface of the electrode, which can achieve high output due to efficient power generation. Furthermore, even if an enzyme or the like is immobilized on an electrode, the enzyme or the like can be prevented from leaching out into a liquid fuel because a fuel is supplied to the electrode in a vaporized state, which can prevent a decrease in the output caused by leaching out of the enzyme or the like. | 12-09-2010 |
20100311133 | ELECTRODE, ENZYME SENSOR USING THE ELECTRODE, FUEL BATTERY, ELECTRONIC DEVICE, AND METHOD FOR DECOMPOSING POLYOL - An electrode that can generate reduced coenzymes from a desired substrate in multiple stages is provided. An electrode includes a 2-hydroxycarboxylic acid synthase, a 2-oxo acid synthase, and a 2-oxo acid carboxylyase. The electrode includes a 2-oxo acid carboxylyase, which is a decarboxylase, in addition to a 2-hydroxycarboxylic acid synthase and a 2-oxo acid synthase, which are oxidoreductases; therefore, oxidation products having carboxyl groups, reactions of which do not proceed with oxidoreductases, can be decarboxylated and modified into substances with which oxidoreductases can act. Thus, oxidation reactions and decarboxylation reactions can repeatedly proceed with respect to desired substrates, and large quantities of reduced coenzymes can be generated thereby. | 12-09-2010 |
20110039165 | FUEL CELL AND METHOD FOR MANUFACTURING THE SAME, ENZYME-IMMOBILIZED ELECTRODE AND METHOD FOR MANUFACTURING THE SAME, AND ELECTRONIC APPARATUS - There is provided a fuel cell whose current density and maintenance ratio can be improved when at least glucose dehydrogenase and diaphorase are immobilized on an anode using an immobilizing material composed of poly-L-lysine and glutaraldehyde. The fuel cell has a structure in which a cathode | 02-17-2011 |
20110059374 | FUEL CELL AND ELECTRONIC APPARATUS - A fuel cell having excellent properties is provided in which, when an enzyme is immobilized in at least one of a positive electrode and a negative electrode, a sufficient buffering capability can be provided even in a high power output operation and the inherent capability of the enzyme can be sufficiently exerted. In a biofuel cell including a structure in which a positive electrode | 03-10-2011 |
20110065008 | ENZYME ELECTRODE AND FUEL CELL USING THE ENZYME ELECTRODE - Provided is an enzyme electrode in which oxidation-reduction reactions proceed with an enzyme acting as a catalyst, and the enzyme is modified to increase affinity and/or reaction rate with a reaction substrate or an electron transfer mediator by adding or inserting at least one codon encoding a particular amino acid residue to or into a base sequence encoding the enzyme, and is immobilized. Since the oxidation-reduction reactions on the electrode proceed highly efficiently, the enzyme electrode can cause to increase the obtained output of electric energy and thus can be suitably used in all types of fuel cells, biosensors, and electronic apparatuses. | 03-17-2011 |
20110076736 | FUEL CELL, METHOD FOR MANUFACTURING FUEL CELL, ELECTRONIC APPARATUS, ENZYME IMMOBILIZATION ELECTRODE, BIOSENSOR, BIOREACTOR, ENERGY CONVERSION ELEMENT, AND ENZYME REACTION-UTILIZING APPARATUS - A fuel cell and a method for manufacturing the same are provided, wherein at least one type of enzyme and coenzyme are confined in a minute space, an enzyme reaction is effected while this space serves as a reaction field. Thereby, electrons can be taken out of the fuel efficiently to generate electrical energy, and immobilization of these enzyme and coenzyme on an electrode can be performed easily. The enzyme and the coenzyme required for an enzyme reaction are encapsulated in a liposome, and the resulting liposome is immobilized on the surface of an electrode formed from porous carbon or the like so as to form an enzyme immobilization electrode. A transporter is incorporated in the liposome, as necessary. An electron mediator is also immobilized on the surface of the electrode. The resulting enzyme immobilization electrode is used as, for example, a negative electrode of a biofuel cell. | 03-31-2011 |
20110117453 | FUEL REFORMER AND POWER GENERATION APPARATUS USING THE SAME - The present invention provides a fuel reformer which enables power generation to be actually performed even in the case of using very-safe familiar things such as food and drink and food scraps as a fuel of a biofuel cell. The fuel reformer is used for a fuel cell which generates power as an oxidation reduction reaction progresses using enzyme as a catalyst, and has: a primary fuel introduction unit for introducing a primary fuel; a fuel reforming unit communicating with the primary fuel introduction unit and reforming the primary fuel to a secondary fuel from which electrons can be emitted by an oxidation reduction reaction using enzyme as a catalyst; and a secondary fuel supplying unit communicating with the fuel reforming unit and supplying the secondary fuel to the fuel cell. | 05-19-2011 |
20110143223 | FUEL CELL - A fuel cell is provided. The fuel cell includes at least one of a plant essential oil and a plant essential oil ingredient in an effective amount so as to function as a biological repellent. | 06-16-2011 |
20110143225 | FUEL CELL AND METHOD FOR MANUFACTURING THE SAME, ELECTRONIC APPARATUS, ENZYME-IMMOBILIZED ELECTRODE AND METHOD FOR MANUFACTURING THE SAME, WATER-REPELLENT AGENT, AND ENZYME-IMMOBILIZING MATERIAL - A fuel cell is provided having a structure in which a cathode and an anode face each other with an electrolyte layer therebetween. The cathode includes an electrode on which an oxygen reductase and the like are immobilized, and the electrode has pores therein, water repellency is imparted to at least part of the surface of the electrode. Water repellency is imparted by forming a water-repellent agent on the surface of the electrode. The water-repellent agent includes a water-repellent material such as carbon powder and an organic solvent such as methyl isobutyl ketone that causes phase separation with water. When the electrode has pores therein, there are provided a fuel cell that stably provides a high current value and a method for manufacturing the fuel cell. | 06-16-2011 |
20110145280 | SYSTEM FOR INQUIRING ABOUT FITNESS OF BEVERAGE AS BATTERY FUEL - Disclosed herein is a system for inquiring about fitness of a beverage as battery fuel, including a search request receiving section configured to receive an input of beverage information regarding a beverage as a search request, a storage section having stored therein a reference database in which search requests and performance data of fuel cells are associated with each other, a search section configured to automatically search the reference database for performance data which coincides with the search request, and a search answer outputting section configured to output a search answer. | 06-16-2011 |
20110171541 | FUEL CELL, METHOD FOR OPERATING THE SAME, AND ELECTRONIC DEVICE - Provided is a fuel cell having a structure in which a cathode and an anode face each other with a proton conductor therebetween. In this fuel cell, an oxygen reductase or the like is immobilized on at least the cathode, and the cathode is composed of a material having pores therein such as porous carbon. In this fuel cell, the volume of water contained in the cathode is controlled to be 70% or less of the volume of the pores of the cathode, whereby a high current value can be stably obtained through optimization of the amount of moisture contained in the cathode when an enzyme is immobilized on at least the cathode. Also provided is a method for operating the fuel cell. | 07-14-2011 |
20110171542 | FUEL CELL, ELECTRONIC DEVICE, MOVABLE BODY, POWER GENERATION SYSTEM, AND COGENERATION SYSTEM - A fuel cell which can directly extract electric power from a polysaccharide, such as starch, is provided. A fuel electrode is formed by immobilizing with an immobilizer, on an electrode comprised of, e.g., carbon, an enzyme responsible for decomposing a polysaccharide into monosaccharides, an enzyme responsible for decomposing the monosaccharide formed, a coenzyme (e.g., NAD | 07-14-2011 |
20110200889 | FUEL CELL, ELECTRONIC DEVICE, AND BUFFER SOLUTION FOR FUEL CELL - A fuel cell with which in the case where an enzyme is immobilized to at least one of a cathode and an anode, sufficient buffer ability is able to be obtained even at the time of high output operation, ability inherent in the enzyme is able to be sufficiently demonstrated, and which has superior performance is provided. In a bio-fuel cell which has a structure in which a cathode and an anode are opposed to each other with an electrolyte layer containing a buffer substance in between, and in which an enzyme is immobilized to at least one of the cathode and the anode, a compound containing an imidazole ring is contained in the electrolyte layer as a buffer substance, and one or more acids selected from the group consisting of acetic acid, phosphoric acid, and sulfuric acid are further added. | 08-18-2011 |
20110229776 | METHOD FOR IMMOBILIZING ENZYME ON ELECTRODE FOR FUEL CELL, FUEL CELL, METHOD FOR MANUFACTURING FUEL CELL, ELECTRODE FOR FUEL CELL, AND METHOD FOR MANUFACTURING ELECTRODE FOR FUEL CELL - Provided are an enzyme immobilizing method, a fuel cell and an electrode for the fuel cell which employ the enzyme immobilizing method, and a method for manufacturing the fuel cell and the electrode. The enzyme immobilizing method prevents reduction in enzyme activity when the enzyme is immobilized on the electrode, so as to make it possible to obtain a high catalyst current value. In the method for immobilizing an enzyme on the electrode used in the fuel cell, an enzyme variant with at least one amino acid residue being deleted, substituted, added, or inserted in a wild-type amino acid sequences is used as the enzyme, and the enzyme variant increases in activity through heat treatment. The immobilization is performed within a temperature range which makes it possible to increase the activity of the enzyme variant. | 09-22-2011 |
20110236770 | FUEL CELL AND ENZYME ELECTRODE - Provided is a fuel cell that is high in performance capabilities of initial power generation and in volume power density, and produces a stable power. Between fixing plates, first and second cell portions are provided. The first cell portion includes an anode, a cathode, and a proton conductor, and the second cell portion includes an anode, a cathode, and a proton conductor. To a space formed by gas-liquid separation and permeable films, cathode spacers, and an anode spacer, a fuel solution is filled. The gas-liquid separation and permeable films are disposed between the fixing plate and the cathode, and between the fixing plate and the cathode. The cathode spacers are provided around the cathodes, respectively, and the anode spacer is provided between the anodes. | 09-29-2011 |
20110250511 | BIOFUEL CELL - Disclosed herein is a biofuel cell including a polymer gel reversibly swelling and contracting in response to variations in a property of a fuel solution making contact therewith, the polymer gel being on a surface of an electrode and/or in the inside of the electrode. | 10-13-2011 |
20110281182 | FUEL ANALYZING METHOD AND FUEL ANALYZING DEVICE FOR FUEL CELL, AND FUEL CELL - Disclosed herein is a fuel analyzing method for a fuel cell, including the steps of: measuring a physical property and/or an electric characteristic of a fuel to be used in a biofuel cell having an electrode with an oxidoreductase present at a surface thereof; and determining the quantity of an effective component which contributes to power generation in the fuel, from the physical property and/or the electric characteristic. | 11-17-2011 |
20110281183 | FUEL CELL - A fuel cell includes: one or a plurality of cell sections having an electrode with an oxidoreductase present at a surface thereof; and a container in which the cell section or sections are contained; wherein the container is provided with a fuel solution pouring port through which to pour a fuel solution into the cell section or sections, and the fuel solution pouring port is oriented in a fixed direction at least at the time of pouring the fuel solution. | 11-17-2011 |
20120000788 | ELECTROLYTIC METHOD OF FUEL - An electrolytic method of a fuel capable of suppressing reverse reaction of an enzyme and improving electrolytic rate is provided. In electrolyzing a fuel such as glucose by using an enzyme/electron mediator obtained by immobilizing an enzyme such as gluconate-5-dehydrogenase, alcohol dehydrogenase, and malate dehydrogenase and an electron mediator onto a porous electrode made of a carbon material, electrode reaction is generated only in the enzyme/electron mediator electrode. | 01-05-2012 |
20120264023 | BIO-FUEL CELL FUEL SUPPLY BODY AND BIO-FUEL CELL SYSTEM - A fuel supply body is partially or wholly formed from a material having a biopolymer as a main component and a biocatalyst that metabolically decomposes the biopolymer is contained therein or immobilized thereto. A bio-fuel cell system is constituted of the fuel supply body and a bio-fuel cell including electrodes with an oxidation-reduction enzyme present on a surface thereof to supply fuel and/or the biocatalyst from the fuel supply body to the bio-fuel cell and also to use the fuel supply body itself as the fuel. | 10-18-2012 |
20130011748 | POWER SUPPLY DEVICE AND ELECTRONIC APPARATUS - A power supply device in which an enzyme is immobilized as a catalyst on negative electrodes and/or positive electrodes, includes electromotive portions in which at least two of the negative electrodes and the positive electrodes are connected in series, and a fuel supply portion which communicates with the negative electrodes and which simultaneously supply a fuel to the negative electrodes, and in the power supply device, the fuel supply portion includes fuel-supply adjusting portions which adjust fuel supply to the negative electrodes. | 01-10-2013 |
20130011749 | FUEL CELL - A separator formed of a material, which does not transmit liquid, is provided between a cell unit including an electrode on a surface of which an oxidoreductase is present and a fuel storage unit provided adjacent to the cell unit. It is configured such that power generation is started by supply of fuel solution stored in the fuel storage unit to the cell unit by removal of at least a part of the separator. | 01-10-2013 |
20130065139 | FUEL CELL - A fuel cell that can have a higher battery capacity without degradation of cathode characteristics is provided. | 03-14-2013 |
20130126336 | CARBON DIOXIDE IMMOBILIZATION UNIT - There is provided a carbon dioxide immobilization unit capable of easily immobilizing carbon dioxide in the form of an organic acid or a carbohydrate under a normal environment. An anode and a cathode both having a surface where an oxidoreductase is present are disposed to face each other with a proton conductor in between. Then, when electric power is externally supplied to the carbon dioxide immobilization unit, in the anode, water is decomposed to produce protons, and in the cathode, an organic acid or a carbohydrate is produced from the protons produced in the anode and carbon dioxide. At this time, while a carbon dioxide supply section supplies a high concentration of carbon dioxide to the cathode, oxygen produced in the anode and the organic acid or hydrocarbon produced in the cathode are removed from a reaction system through an oxygen removal section and a product recovery section, respectively. | 05-23-2013 |
20130143131 | BIOFUEL CELL - A biofuel cell is formed by disposing an anode (negative electrode) to be a fuel electrode, an anode current collector, a separator, a cathode current collector, a cathode (positive electrode) to be an air electrode and a gas-liquid separation membrane in this order between a fuel tank and a positive electrode cover. During the formation, an electrode formed of a carbon fiber fabric having a network structure constituted by a monofilament strand of a carbon fiber and has a redox enzyme on the surface is used in at least the anode. | 06-06-2013 |
20140051905 | STIMULUS GENERATION APPARATUS - There is provided a stimulus generation apparatus including a stimulus generation section which provides a stimulus for promoting fat burning for fat or a satiety center inside a body cavity. | 02-20-2014 |
20140065494 | FUEL CELL, METHOD FOR PRODUCING FUEL CELL, ELECTRONIC APPARATUS, NICOTINAMIDE ADENINE DINUCLEOTIDE-IMMOBILIZED ELECTRODE, NICOTINAMIDE ADENINE DINUCLEOTIDE-IMMOBILIZED CARRIER, ENZYME REACTION UTILIZATION DEVICE, PROTEIN-IMMOBILIZED ELECTRODE AND PROTEIN-IMMOBILIZED CARRIER - Provided is a fuel cell capable of preventing elution of nicotinamide adenine dinucleotide and/or a derivative thereof immobilized on an electrode, and capable of preventing performance degradation due to elution, and a method for manufacturing the fuel cell. | 03-06-2014 |