Abstract: A secondary battery including a cathode, an anode, and a non-aqueous electrolytic solution, in which the cathode includes an electrode compound which absorbs and releases an electrode reactant at a potential of 4.5 V or higher (potential versus lithium), and the non-aqueous electrolytic solution includes a silyl compound where one or two or more silicon-oxygen-containing groups (SiR3—O—: the three R's are respectively any one of a monovalent hydrocarbon group and a halogenated group thereof) are bonded with an atom other than silicon.

Abstract: A small and high-density biofuel cell capable of easily supplying fuel; and an electronic apparatus are provided. The biofuel cell is formed using a stack in which two power generating bodies that include at least a pair of electrodes and a separator are stacked through a gas diffusion layer through which only gas is permeable, the electrodes forming an anode and a cathode and having at least one surface on which an oxidoreductase is present, the separator being arranged between the electrodes and including a proton permeable membrane. In addition, at this time, cathode-side surfaces of the respective power generating bodies of the stack are arranged in contact with the gas diffusion layer. This biofuel cell is mounted on the electronic apparatus.

Abstract: The valve control unit of a fuel leakage preventing structure of the present invention includes first and second electrodes. The first electrode is attached to a first member that is movable. When a pressing force is applied to the first member to move, the first and second electrodes are brought into contact with each other, to cause conduction. The first and second electrodes are connected to a control device, and the control device opens a control valve when the first and second electrodes are put into a conducting state. As the control valve is opened and closed by a pressing force in this manner, a fuel solution can be easily supplied.

Abstract: 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.

Abstract: Provided is a method for producing a fuel battery in which an oxidoreductase has been fixed as a catalyst on at least one electrode of a negative electrode or a positive electrode, including conducting at least a step of preparing an electrode pattern, in which an electrode material containing at least electroconductive particles is printed on the surface of a bendable non-electroconductive sheet, and a step of preparing a negative electrode and a positive electrode, in which a negative electrode and a positive electrode are made by printing a predetermined oxidoreductase on the electrode pattern prepared in the step of preparing an electrode pattern.

Abstract: 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. A biofuel cell having a structure in which a positive electrode and a negative electrode face each other via a proton conductor, the biofuel cell configured so that an enzyme is used to extract electrons from a fuel, wherein the negative electrode is configured from an electrode including carbon and/or an inorganic compound having pores with a size of 2 nm or more and 100 nm or less on the surface, nicotinamide adenine dinucleotide and/or a derivative thereof being immobilized on the carbon and/or the inorganic compound. A carbon particle, a carbon sheet, or carbon fiber is used as the carbon.

Abstract: The valve control unit of a fuel leakage preventing structure of the present invention includes first and second electrodes. The first electrode is attached to a first member that is movable. When a pressing force is applied to the first member to move, the first and second electrodes are brought into contact with each other, to cause conduction. The first and second electrodes are connected to a control device, and the control device opens a control valve when the first and second electrodes are put into a conducting state. As the control valve is opened and closed by a pressing force in this manner, a fuel solution can be easily supplied.

Abstract: 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.

Abstract: A fuel cell that can have a higher battery capacity without degradation of cathode characteristics is provided. In a biofuel cell that includes one or more battery cell units (1) in which an oxidoreductase exists on the surface of an anode (2) and/or a cathode (3), and the cathode (3) is in contact with both a liquid phase and a gas phase, a selective transmission film (6) that restrains permeation of at least the fuel component is provided between an anode solution unit (4) provided around the anode (2) and a cathode solution unit (5) provided around the cathode (3). The fuel component concentration in the solution in contact with the anode (2) is higher than that in the solution in contact with the cathode (3).

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: Provided is a biofuel cell including: electrodes disposed inside a cell casing; and current collectors exposed to the outside of the cell casing; wherein a part of each of the current collectors is separably put in close contact with the corresponding electrode through an opening provided in the cell casing, in the state of being provided with a leakage preventive section configured to prevent a solution inside the cell casing from leaking out through the opening.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.