Abstract: In a fuel cell according to the present invention, a plurality of unit cells each includes an anode and a cathode, each formed of a porous substrate, and an electrolyte matrix layer interposed between the anode and the cathode. A fuel gas channel is formed on one surface of the anode that is located on the side opposite to the electrolyte matrix layer, and an electrolyte-solution permeable portion is formed on the same surface of the anode. The unit cells are stacked in layers, and a plurality of separator elements are interposed between the adjacent unit cells to form a stacked structure. Each of the separator elements has a recess formed on its surface that is located on the side facing the anode. The recess serves to store an electrolyte solution and contain the electrolyte-solution permeable portion. Thus, if an electrolyte solution, with which the electrolyte matrix layer is impregnated, is reduced, the solution stored in the recess permeates the matrix layer, flowing through the permeable portion.

Abstract: In a stacked structure for forming a molten carbonate fuel cell according to the present invention, a plurality of unit cells are stacked, and separator elements are respectively interposed between the adjacent unit cells. First and second internal manifolds extend in the stacking direction, at both sides of the stacked structure. Third internal manifold extends at the center of the structure, in the direction of stacking. First fuel gas passages, communicating with the first and third internal manifolds, are formed at the anode side of the separator element. Second fuel gas passages, communicating with the second and third internal manifolds, are formed at the anode side of the separator element. Thus, the fuel gas flows through the first internal manifold, the first fuel gas passages and the third internal manifold, and the fuel gas flows through the second internal manifold, the second fuel gas passages and the third internal manifold.

Abstract: A method for manufacturing a fuel cell electrolyte matrix comprises the steps of providing a fuel electrode and oxidizing electrode respectively coated with a catalyst layer on one side, forming a layer of powdery electrolyte-resistive material on the surface of at least one of the catalyst layers, coating a paste layer prepared from acid electrolyte and powdery electrolyte-resistive material on the powder layer or catalyst layer of the fuel electrode and/or the powder layer or catalyst layer of the oxidizing electrode, tightly superposing the fuel electrode and oxidizing electrode on each other with the paste layer and powder layer interposed therebetween, thereby forming an electrolyte matrix between both electrodes.

Abstract: A method for manufacturing a fuel cell electrolyte matrix comprises the steps of providing a fuel electrode and oxidizing electrode respectively coated with a catalyst layer on one side, forming a layer of powdery electrolyte-resistive material on the surface of at least one of the catalyst layers, coating a paste layer prepared from acid electrolyte and powdery electrolyte-resistive material on the powder layer or catalyst layer of the fuel electrode and/or the powder layer or catalyst layer of the oxidizing electrode, tightly superposing the fuel electrode and oxidizing electrode on each other with the paste layer and powder layer interposed therebetween, thereby forming an electrolyte matrix between both electrodes.

Abstract: A porous gas diffusion electrode for use in an air-metal cell or a hydrogen-air (oxygen) cell comprising an electroconductive porous substrate, which has itself on one surface thereof reaction gas feed channels or is to be used with one surface in contact with reaction gas feed channels during use, and which comprises gas impermeable and electrically insulating seals formed of a tetrafluoroethylene-perfluoroalkyl vinyl ether compolymer provided on the substrate at least at both end portions parallel to said reaction gas feed channels, is capable of positively shielding the gas streams at the end portions parallel to the reaction gas feed channels and maintaining electrical insulation.

Abstract: An electrochemical power generator is disclosed which is composed of a plurality of unit cells stacked with interconnectors interposed therebetween; said unit cells being each composed of an anode consisting of a porous carbon plate having on its one surface a plurality of grooves constituting gas passages and on its other surface an anode catalyst layer; a cathode formed on its one surface with a cathode catalyst layer and applied on its other surface a hydrophobic material powder consisting of fluoropolymer resin; and an electrolyte layer interposed between the anode and the cathode in such a manner that its two surfaces are allowed to come into contact, respectively; said anode catalyst layer and said cathode catalyst layer, the electrolyte layer being prepared by causing an acidic electrolyte to be impregnated into an inorganic compound powder having heat resistance and chemical resistance; the interconnectors being each compressed of a high density carbon plate and having, on each surface coming into con

Abstract: A fuel cell stack has a plurality of stacked unit cells, each consisting of a pair of gas diffusion electrodes with a matrix containing an electrolyte solution interposed between them, with an interconnector having a fuel gas passage on one surface and an oxidizing gas agent passage on the other surface interposed between each pair of adjacent unit cells. One out of every three to five interconnectors is a one-piece-molded product which has at least one cooling pipe embedded in it and which provides an excellent cooling effect. The fuel cell stack stably provides a high output voltage over a long period of operation time.

Abstract: The invention provides an electrochemical power generator having a structure where a plurality of unit cells are stacked such that each pair of adjacent unit cells sandwich an interconnector therebetween. Each unit cell is formed such that an anode of a porous carbon substrate having an anode catalyst layer on one surface thereof and a cathode of a porous carbon fiber sheet having a cathode catalyst layer on one surface thereof sandwich a matrix layer containing an electrolyte solution of a concentrated acid solution therebetween so as to respectively bring the two surfaces of the matrix layer into tight contact with the anode and cathode catalyst layers. The interconnector is formed of a high density carbon plate. The electrochemical power generator uses as an anode reactant material a gas containing hydrogen as a major component, and uses as a cathode reactant material an oxidizing gas.

Abstract: A sealed storage battery comprising a sealed container, an electricity generating means contained in the sealed container and composed of a positive electrode, a negative electrode and an electrolyte, a hydrogen gas oxidation auxiliary electrode disposed within the sealed container, and a resistance means connected to the auxiliary electrode and having an inverse current checking characteristic (or property).In this sealed storage battery, the (critical) point of time of overcharging in charging the sealed storage battery may be detected by monitoring the variation of the voltage between the positive electrode or a separately provided measurement electrode and the auxiliary electrode.

Abstract: An electrochemical cell which includes a sealed metallic container at least partially composed of an anode metal member and a cathode metal member, said container containing a power generating material. At each edge portion of the metal members is covered by a seal material including a coating layer of thermoplastic resin containing a functional group with hydrogen bonding capability. Sealing of the metallic container is achieved by heat-pressure bonding the seal members formed on the respective metal members with each other or these seal members with similar seal members formed on another metal member forming the metallic container.

Abstract: An improved rechargeable nickel-zinc battery is described which is capable of undergoing many charge-discharge cycles (cycle life), with deep discharge, and of high performance with heavy drain discharge during use. The increased cycle life is accomplished by a suitable combination of electrochemical generating elements. The high performance with heavy drain discharge service is obtained by an improved zinc electrode construction. The battery of this invention has a sheet-like kneaded zinc electrode, a sheet-like nickel oxide electrode with limited capacity ratio thereof, a separator, an electrolyte absorber, and a concentrated alkaline electrolyte in limited amounts.

Abstract: The positive electrode of a nickel-zinc cell comprises a positive electrode composition containing less than 90 parts by weight manganese dioxide in 100 parts of nickel oxide which is mixed with an electroconducting material and binding material. The positive electrode composition, preferably is tightly covered with an electron conducting sheet containing many apertures. The nickel-zinc cells modified by these procedures have an improved capacity which is available during heavy current discharge loads, particularly under intermittent discharge, and the capacity loss of the cells during storage is reduced.

Abstract: Provided is a nickel-zinc storage battery prepared, preferably, by winding into a whirlpool a sheet-like zinc electrode, a sheet-like nickel electrode and a separator with the separator interposed between the zinc and nickel electrodes, said zinc electrode being obtained by bonding under pressure to a collector a mixture sheet consisting of zinc oxide, zinc, bismuth oxide, calcium hydroxide and fluoroplastic, said nickel electrode being obtained by bonding under pressure an oxide of nickel to a collector together with a conductive material, said separator being obtained by coating on an alkali-resisting nonwoven fabric a mixture of polyvinyl alcohol and at least either of one selected from the group consisting of boric acids and metal oxides having low solubility to alkali solution and drying the nonwoven fabric thus coated.