Forschungszentrum Juelich Gmbh

Forschungszentrum Julich Gmbh

Forschungszentrum J{umlaut Over (u)}lich Gmbh

Consejo Superior De Investigaciones Cientificas

Plansee Se

Universidad Politècnica De València

Hans Peter Buchkremer

Robert Fleck

Detlev Stöver

Martin Bram

Robert Vassen

Frank Tietz

Sven Uhlenbruck

Marco Brandner

Ashok K Gupta

Willem J Quadakkers

Andreas Hofenauer

Thomas Jansing

Wilhelm Albert Meulenberg

Andreas Venskutonis

Detlev Stoever

Christoph Sorg

Helmut Ringel

Martin Finsterbusch

Isabel Kundler

Thomas Franco

José Manuel Serra Alfaro

Norbert H Menzler

Matthias Ruettinger

Detlev St&ouml;ver

Leszek Niewolak

Jens-Erich Döring

Roberto Siegert

Franziska Traeger

Joanna Zurek

Stephan Reckers

Rolf Steinbrech

Alexander Laptev

Heinz Nelles

Robert Muecke

Josef Mertens

Rolf Wilkenh&ouml;ner

Manuel Koehl

Werner Mallener

Chih-Long Tsai

Berthold Coenen

Eva Maria Hammer

Andreas Hospach

Ralf Markusch

Ralf Hansch

Dag Hathiramani

Detlev Stover

Matthias RÜTTINGER

Robert MÜCKE

Feng Han

Lambertus GJ De Haart

Norbert Menzler

Günter Blass

Udo Flesch

Mariya Ivanova

Sonia ESCOLÁSTICO

Stephan Hegele

Jürgen Belle

A method for producing at least one electrochemical cell of a solid-state battery, comprising a mixed-conducting anode, a mixed-conducting cathode, and an interposed electrolyte, is characterized in that a mixed-conducting anode and a mixed-conducting cathode are initially produced or provided. The surface of at least one of the two electrodes is modified by way of an additional method step in such a way that the electronic conductivity perpendicular to the cell is reduced to less than 10S/cm in a layer of the electrode near the surface. The anode and cathode are then assembled to form a solid-state battery in such a way that the surface-modified layer of at least one electrode is disposed as an electrolyte layer between the anode and cathode, and the mixed-conducting electrodes are thereby electronically separated.

Method for producing electrochemical cells of a solid-state battery

A rechargeable energy storage device according to the invention is based on a metal-air battery, in which a gas electrode is used and an ion-conducting or proton-conducting membrane is used as the electrolyte. In contrast to the known metal-air batteries, the active component on the side of the electrolyte membrane opposite the gas electrode is present in the form of a liquid medium in the energy storage device according to the invention. The liquid-medium/gas battery according to the invention comprises a receptacle, which includes a medium in liquid form as the active material at the operating temperature of the battery.

Electrochemical energy store and method for operating the same

Storage material, for storing electrical energy by reduction or oxidation of an active component, comprises the active component in at least a reduced and/or oxidized form and a reactive framework structure that is capable of chemically integrating at least one form of the active component in the form of a mixed oxide or an alloy into the reactive framework structure during the charging or discharging process. In the case of an oxidic framework structure, said integration can occur by formation of at least one stable mixed oxide of the active component and an oxide from the framework structure. In the case of the metallic framework structure, said integration can occur by forming an alloy of active component and at least one metal of the framework structure.

Electrochemical storage material and electrochemical storage device for storing electrical energy, comprising such a storage material

The substrate-supported anode for a high-temperature fuel cell comprises an at least three-layer anode laminate on a metallic substrate. Each of the layers of the anode laminate comprises yttria-stabilized zirconia and nickel, wherein the mean particle size of the nickel decreases from one layer to the next as the distance from the substrate increases. The last layer of the anode laminate, which is provided for contact with the electrolyte, has a root mean square roughness of less than 4 &#x3bc;m. The overall mean pore size of this layer is typically between 0.3 and 1.5 &#x3bc;m. Starting powders having a bimodal particle size distribution of yttria-stabilized zirconia and nickel-containing powder are used at least for the first and second layers of the anode laminate. The mean particle size of the nickel-containing powder is reduced from one layer to the next, whereby it is advantageously no more than 0.5 &#x3bc;m in the last layer of the anode laminate.

Anode for a high-temperature fuel cell and production thereof

Disclosed is a method for producing semi-finished products from a shape memory alloy, particularly an NiTi shape memory alloy, wherein a powder is first produced from a shape memory alloy, and subsequently the powder is divided into a coarse fraction and a fine fraction in a separating cut T. While the fine fraction is required, in particular, for the production of a first semi-finished product, employing the metal injection molding (MIM) method, the coarse fraction can be used for the production of a second semi-finished product, employing the hot isostatic pressing (HIP) method. The advantages of the invention can be summarized as follows. The MIM method for producing semi-finished products from a shape memory alloy is qualitatively improved and more cost-effective to implement if the coarse fraction that is typically obtained during powder production, but not used for the MIM process, can advantageously be supplied to a further process, in this case the HIP process. Due to the use of particularly fine powder, the semi-finished products produced by way of the MIM method have an advantageous, powder-metallurgical microstructure. In particular, the alloying elements are distributed particularly homogeneously in these semi-finished products, casting flaws or segregations do not usually occur, no anisotropy of the structure occurs as a result of the processing steps, and ternary alloys can be processed, which due to the mechanical properties thereof, cannot be processed by way of conventional forming methods.

Method for producing semi-finished products from NiTi shape memory alloys

A system for gas separation has a mechanically stable metallic substrate layer having a pair of opposite faces and formed throughout with open pores. Respective functional layers laminated on each of the faces are composed of TiOor ZrO. These functional layers are formed throughout with pores having an average pore diameter of less than 1 nm.

Device for gas separation and method for producing such a system

The aim of the invention is to produce complete high temperature fuel cells by means of thermal injection processes (e.g. atmospheric plasma injection, vacuum plasma injection, high speed flame injection). The production method is especially simplified and is economical by virtue of the fact that the carrier substrate is also produced on a base with the aid of a thermal injection method. The base or an intermediate layer placed thereon can be advantageously dissolved or decomposed such that the carrier substrate provided with layers arranged thereon can be separated in a very simple manner from the base which becomes unnecessary. Said method advantageously enables the production of all layers of a high temperature fuel cell, exclusively with the aid of a thermal injection method.

Method for producing a layer system comprising a metallic carrier and an anode functional layer

A porous near-net-shape metallic parts with an open porosity of at least 10% by volume is made by first forming an injectable mass of a metallic powder of stainless steel, Ti, NiTi, or a titanium alloy, at least one thermoplastic binder, and at least one place holder. The mass then injection molded into the shape of the part to be produced, cooled, set in a capillary-active material, and subjected to a first-stage binder removal to produce an open porosity. The place holder is then removed at least partially from the part with a fluid, and the part is subjected to a thermal binder-removing process. Finally the part is sintered.

Method for the production of near net-shaped metallic and/or ceramic parts

The invention relates to a high-temperature resistant seal, particularly a seal for use in a high-temperature fuel cell. The inventive seal comprises a structured metallic layer having at least one area on whose surface a filler is placed. The filler is comprised, in particular, of clay minerals or ceramic materials. The seal thus advantageously combines the sealing properties of a metallic layer, for example, of an undulated metal foil with the elastic properties of the filler. The seal is particularly suited for use at high temperatures and thus, for example, in high-temperature fuel cells.

High-temperature resistant seal

The invention relates to a method for producing highly porous, metallic molded bodies. The inventive method consists of the following steps: a metallic powder used as a starting material is mixed with a dummy; a green body is pressed out of the mixture; the green body is subjected to conventional mechanical machining, the dummy advantageously increasing the stability of the green body; the dummy material is thermally separated from the green body by means of air, a vacuum or an inert gas; and the green body is sintered to form the molded body and is then advantageously finished. Suitable materials for the dummy are, for example, ammonium bicarbonate or carbamide. The mechanical machining carried out before the sintering advantageously enables a simple production close to the desired final contours, even for complicated geometries of the molded body to be produced, without impairing the porosity, and without high wear of the tools. The workpiece is advantageously sufficiently stable in terms of pressure for the green machining as the dummy material is still present in the pores of the green body during the machining.

Method for producing highly porous metallic moulded bodies close to the desired final contours

Production of catalyst layers on diaphragms for low-temperature fuel cells

In a dispersoid-reinforced electrode with a net-like open pore structure and a ceramic and a metallic meshwork, ceramic particles with an average particle diameter of less than 100 nm are homogeneously distributed in the metallic network thereby reinforcing the electrode.

Dispersoid-reinforced electrode

Growing community of inventors

Heinsberg, Germany

Hans Peter Buchkremer