Patent application number | Description | Published |
20080318091 | METHOD AND SYSTEM OF OPERATING A HIGH-TEMPERATURE FUEL CELL - The invention relates to a method and to a system of operating a high-temperature fuel cell. At least one fuel cell, a reformer, an afterburner and a heat exchanger are present in the system. The total efficiency should be increased with the invention in accordance with the object set. In accordance with the invention, for this purpose, fresh air supplied to the fuel cell(s) at the cathode side is preheated in multiple stages by heat from the afterburning and from the heated air dissipated from the fuel cell(s) at the cathode side by means of a high-temperature heat exchanger. | 12-25-2008 |
20090325023 | Repetition Unit for a Stack of Electrochemical Cells, Stack Arrangements And Method for Production of Repetition Unit - The present invention relates to a repetition unit for a stack of electrochemical cells comprising a cathode-electrolyte-anode unit as well as a first layer and at least one further layer of an interconnector plate contacting it, wherein the first layer is made from sheet metal and is in electrical contact with the cathode-electrolyte-anode unit, while the at least one further layer is omitted in an active region, wherein furthermore the at least one further layer comprises an unshaped planar material and the first layer is also unshaped in a marginal region surrounding the active region and the cathode-electrolyte-anode unit and wherein all the named layers of the interconnector plate are soldered to one another in the marginal region. The invention furthermore relates to a corresponding stack arrangement of electrochemical cells as well as to a method for the manufacture of such a repetition unit. | 12-31-2009 |
20100068602 | FUEL CELL STACK AND SEAL FOR A FUEL CELL STACK, AS WELL AS A PRODUCTION METHOD FOR IT - The invention relates to a sealing for the gas-tight connection of two elements of a fuel cell stack comprising an electrically non-conducting spacer component and at least one solder component solid or viscous over its entire extension at the operating temperature of the fuel cell stack and coupling the spacer component to at least one of the elements to be connected of the fuel cell stack in a gas-tight manner. According to the invention it is envisaged that the spacer component is formed of a ceramic material. The invention further relates to a fuel cell stack in which, according to the invention, it is envisaged that a distribution of forces compressing the fuel cell stack in the axial direction is directly transmitted to at least one of the elements to be connected by the spacer component. The invention further relates to production methods for seals and fuel cell stacks. | 03-18-2010 |
20100108953 | MATERIAL FOR PROTECTIVE COATINGS ON HIGH TEMPERATURE-RESISTANT CHROMIUM OXIDE-FORMING SUBSTRATES, METHOD FOR THE PRODUCTION THEREOF, AND USE THEREOF - The invention relates to a material for the formation of protective layers resistant to high temperatures on chromium oxide forming substrates, to a manufacturing method and to a use of these materials. It is suitable for a use as a chromium evaporation layer for metallic alloys containing chromium in the high temperature range. It is the object of the invention to provide a material for applications as a protective layer for chromium oxide forming alloys of high temperature resistance which is thermally and mechanically permanently stable and ensures a high electrical conductivity at the operating temperature of the fuel cell. In accordance with the invention, the material is formed from a spinel phase and an oxidic secondary phase which is preferably formed with an oxidic compound containing manganese. | 05-06-2010 |
20100120611 | CATALYTICALLY ACTIVE COMPONENT FOR THERMAL IONIZATION DETECTORS FOR THE DETECTION OF HALOGEN-CONTAINING COMPOUNDS AND PROCESS FOR PRODUCING AN OXIDE-CERAMIC MATERIAL FOR THE COMPONENT - The invention relates to catalytically active components for thermal ionization detectors for the detection of compounds containing halogen which have an improved structure as well as to a manufacturing method for an oxide ceramic sintering material for the components. It is the object of the invention to manufacture catalytically active components for thermal ionization detectors for gas chromatographic applications which are thermally, mechanically and chemically stable in the long term and which have increased sensitivity to the materials to be detected. In this respect, the sintering material should be adjustable in a controllable manner in the ideal parameter required for the detector. It is proposed in accordance with the invention to use an oxide ceramic sintering material for the components which comprises a crystalline phase and an amorphous glass phase, with it being essential to the invention that the amorphous glass phase is formed with 0.1 to 20% by weight of a cesium compound. | 05-13-2010 |
20100207646 | METHOD FOR DETERMINING DIFFUSION AND/OR TRANSFER COEFFICIENTS OF A MATERIAL - The invention relates to a method for the determination of diffusion coefficients and/or exchange coefficient of a material having electronic and ionic conductivity. The material is permeable to at least one gas. It is the object of the invention to provide a cost-effective, accurate method for the determination of the diffusion coefficient and of the surface exchange coefficient which can be carried out in a short time and can thus be used for a screening of materials, in particular for application in the field of permeation membranes. The procedure is followed in accordance with the invention such that a sample of the material is arranged in a measurement chamber and has an electric current passed through it for a determination of the electric resistance. In this respect, a gas mixture in which the respective gas is contained is conducted through the measurement chamber as a gas flow and the partial pressure of the respective gas in the gas mixture is changed periodically at regular intervals. The change in the electric resistance of the sample is measured and a diffusion coefficient and/or exchange coefficient of the material can be determined for the respective gas from the determined change in the electric resistance. | 08-19-2010 |
20120135336 | CONTACT ELEMENT FOR AN ELECTRICALLY CONDUCTIVE CONNECTION BETWEEN AN ANODE AND AN INTERCONNECTOR OF A HIGH-TEMPERATURE FUEL CELL - The invention relates to a contact element for an electrically conductive connection between an anode and an interconnector of a high-temperature fuel cell. It is the object of the invention to achieve a more reliable electrically conductive connection with long-term stability between an anode and the associated interconnector of a high-temperature fuel cell. The contact element in accordance with the invention is arranged between an anode and an interconnector of a high-temperature fuel cell. It is formed with two areal electrically conductive part elements. In this respect, one respective part element is in touching contact with the anode and the other part element is in touching contact with the respective interconnector. Openings are formed in the part elements and the part elements are formed from materials having mutually different coefficients of thermal expansion. | 05-31-2012 |
20140023957 | LAYER STRUCTURE AND USE THEREOF TO FORM A CERAMIC LAYER STRUCTURE BETWEEN AN INTERCONNECT AND A CATHODE OF A HIGH-TEMPERATURE FUEL CELL - The invention relates to a layer structure which is formed between an interconnect and a cathode of a solid oxide fuel cell and can be used for forming a ceramic layer structure between an interconnect and a cathode. In this respect, the interconnect comprises a metal alloy containing chromium. The object of the present invention is to provide a layer structure between an interconnect and a cathode of a solid oxide fuel cell with which a good protective function (from corrosion and from chromium vaporization), a high electrical conductivity and also a good thermal expansion behavior adapted to the materials of an interconnect and of a cathode can be achieved. The layer structure in the green state is formed by a powdery spinel as well as at least one of the below-named metal oxides CuO, NiO, CoO | 01-23-2014 |
20140291151 | METHOD FOR PRODUCING SOLID OXIDE FUEL CELLS HAVING A CATHODE-ELECTROLYTE-ANODE UNIT BORNE BY A METAL SUBSTRATE, AND USE OF SAID SOLID OXIDE FUEL CELLS - The invention relates to a method of producing solid oxide fuel cells (SOFC) having a cathode-electrolyte-anode unit supported by a metal substrate. It is the object of the invention in this respect to provide solid oxide fuel cells which achieve an increased strength, improved temperature change resistance, a secure bonding of films forming the cathode-electrolyte-anode unit and can be produced free of distortion and reproducibly. In the method in accordance with the invention, a film forming the anode is first wet chemically applied to a surface of a porous metallic substrate as a carrier of the cathode-electrolyte-anode unit. An element which has already been sintered gas tight in advance and which forms the electrolyte is then placed on or applied a really to this film forming the anode and at a first thermal treatment up to a maximum temperature of 1250° C. the organic components contained in the film forming the anode are expelled, this film is sintered and in so doing a connection with material continuity is established between the substrate and the electrolyte. Subsequent to this, a further film forming the cathode is wet chemically applied to the electrolyte and is sintered in a further thermal treatment at temperatures beneath 1000° C. and the cathode is connected with material continuity to the electrolyte. | 10-02-2014 |
20140349197 | SOLID-STATE ELECTROLYTE FOR USE IN LITHIUM-AIR BATTERIES OR IN LITHIUM-WATER BATTERITES - The invention relates to solid-state electrolytes for use in lithium-air batteries or in lithium-water batteries. It is the object of the invention to provide solid electrolyte for use in lithium-air batteries or lithium-water batteries, with the solid electrolyte having sufficient strength, good conductivity for lithium ions, imperviousness for gas and water resistance and being inexpensive in manufacture. The solid-state electrolyte in accordance with the invention has an open-pore ceramic carrier substrate. In this respect, at least one layer which is conductive for lithium ions, which has an electrical conductivity of at least 10 | 11-27-2014 |
20150038312 | COMPOSITION FOR PRODUCING GLASS SOLDERS FOR HIGH-TEMPERATURE APPLICATIONS AND USE THEREOF - The invention relates to compositions for the manufacture of glass solders for high-temperature applications up to temperatures of approx. 1000° C. and to their use. SiO2 having a proportion in the range from 48 mol-% to 62 mol %, Al2O3 having a proportion in the range from 0.5 mol % to 6 mol %, B2O3 having a proportion in the range 4 mol % to 12 mol % and BaO having a proportion in the range 12 mol % to 30 mol % as well as CaO having a proportion in the range from 2.5 mol % to 15 mol %, or an R2O3 having a proportion in the range 0.5 mol % to 20 mol % are contained in the composition in accordance with the invention, where the R2O3 is selected from La2O3, Y2O3, Sc2O3 and from a further oxide of a chemical element from the series of lanthanoids. In this respect, an SiO2:BaO ratio in the range from 1.9 to 4 is observed and no ZrO2 is contained. | 02-05-2015 |