Abstract: A solid-state cell, a solid-state battery, and an associated method for producing a solid-state cell is disclosed. A solid-state cell has an electrolyte comprising NaSICON. The solid-state cell comprises a first electrode arranged at a first region of the electrolyte and a second electrode arranged at a second region of the electrolyte. A continuous material layer is arranged at least a third region of the electrolyte on an outer surface of the electrolyte. Alternatively, a chemical composition of the outer surface in the third region of the electrolyte is changed. In this way, the formation of filaments and/or dendrites can be effectively prevented and operation at significantly increased current densities is possible.

Abstract: Provided is a method for producing an electrode for a solid-state battery comprising providing a multilayer solid ceramic electrolyte that comprises at least one dense layer having a total ion conductivity of at least 1 mS/cm at 25° C. and at least one porous layer having continuous and open pores having an average pore diameter between 1 and 50 ?m; providing an aqueous infiltration fluid comprising at least one organic additive that can be at least partially converted into carbon; introducing the aqueous infiltration fluid into the at least one porous layer of the multilayer solid ceramic electrolyte; and subjecting the multilayer solid ceramic electrolyte to a thermal treatment in the form of sintering in a reducing atmosphere at temperatures between 400° C. and 900° C., whereby the electrode material is synthesized from the precursor of the electrode material on the surface of the pores in situ.

Abstract: Provided is a method for producing an electrode for a solid-state battery comprising providing a multilayer solid ceramic electrolyte that comprises at least one dense layer having a total ion conductivity of at least 1 mS/cm at 25° C. and at least one porous layer having continuous and open pores having an average pore diameter between 1 and 50 ?m; providing an aqueous infiltration fluid comprising at least one organic additive that can be at least partially converted into carbon; introducing the aqueous infiltration fluid into the at least one porous layer of the multilayer solid ceramic electrolyte; and subjecting the multilayer solid ceramic electrolyte to a thermal treatment in the form of sintering in a reducing atmosphere at temperatures between 400° C. and 900° C., whereby the electrode material is synthesized from the precursor of the electrode material on the surface of the pores in situ.

Abstract: A method for preparing electrolyte material having a NASICON structure, based on a Na3+xScxZr2?x(SiO4)2(PO4) compound where 0?x<2. The method includes providing an acidic, aqueous solution which, according to a desired stoichiometry, comprises sodium, scandium and zirconium in the form of water-soluble nitrates, acetates or carbonates, and soluble silicates or orthosilicic acids or organic silicon compounds in dissolved form; subsequently adding phosphoric acid or ammonium dihydrogenphosphate or other soluble phosphates, according to the desired stoichiometry, complex zirconium dioxide phosphates forming as colloidal precipitations; and subsequently drying and calcining the mixture.

Abstract: A method for preparing a lithium titanium phosphate, wherein a sol-gel process is used to prepare the phosphate, includes producing a sol from source materials; converting the sol to a gel; and drying the gel to obtain a corresponding powder comprising the lithium titanium phosphate. In a substep, the method further includes adding titanium(IV) isopropoxide to water to produce precipitates of titanium hydroxide oxide, cooling a system down to a temperature of less than 10° C., and redissolving the precipitates by adding nitric acid to form an aqueous TiO2+ nitrate solution. The lithium titanium phosphate has a general composition Li1+x+yMxTi2?x(PO4)3?y(SiO4)y, wherein M=Al, Ga, In, Sc, V, Cr, Mn, Co, Fe, Y, La—Lu, wherein 0?x?0.5, and wherein 0?y?0.5.

Abstract: A method for preparing electrolyte material having a NASICON structure, based on a Na3+xScxZr2?x(SiO4)2(PO4) compound where 0?x<2. The method includes providing an acidic, aqueous solution which, according to a desired stoichiometry, comprises sodium, scandium and zirconium in the form of water-soluble nitrates, acetates or carbonates, and soluble silicates or orthosilicic acids or organic silicon compounds in dissolved form; subsequently adding phosphoric acid or ammonium dihydrogenphosphate or other soluble phosphates, according to the desired stoichiometry, complex zirconium dioxide phosphates forming as colloidal precipitations; and subsequently drying and calcining the mixture.

Abstract: A method for preparing a lithium titanium phosphate, wherein a sol-gel process is used to prepare the phosphate, includes producing a sol from source materials; converting the sol to a gel; and drying the gel to obtain a corresponding powder comprising the lithium titanium phosphate. In a substep, the method further includes adding titanium(IV) isopropoxide to water to produce precipitates of titanium hydroxide oxide, cooling a system down to a temperature of less than 10° C., and redissolving the precipitates by adding nitric acid to form an aqueous TiO2+ nitrate solution. The lithium titanium phosphate has a general composition Li1+x+yMxTi2?x(PO4)3?y(SiO4)y, wherein M=Al, Ga, In, Sc, V, Cr, Mn, Co, Fe, Y, La-Lu, wherein 0?x?0.5, and wherein 0?y?0.5.

Abstract: The invention relates to the hardening of the surface layer of parts of machines, plants and apparatuses and also tools. Objects for which the application is possible and advantageous are components which are subjected to severe fatigue or wear stresses and are composed of hardenable steels and have a complicated shape and whose surface has to be hardened selectively on the functional surfaces or whose functional surface has a multidimensional shape. The process for hardening the surface layer of components having a complicated shape is carried out by means of a plurality of energy input zones.

Abstract: The invention relates to an anode for a high-temperature fuel cell having an anode substrate and/or a functional anode layer, comprising a porous ceramic structure having a first predominantly electron-conducting phase with the general empirical formula Sr1-xLnxTiO3 wherein Ln=Y, Gd to Lu and 0.03<x<0.2, and having a second predominantly ion-conducting phase component comprising yttrium or scandium-stabilized zirconium dioxide (YSZ or ScSZ). In the anode substrate and/or the functional anode layer, the ratio by volume of the first phase to the second phase ranges from 80:20 to 50:50, and particularly from 70:30 to 60:40. The porosity of the entire anode ranges between 15 and 50% by volume. The anode additionally comprises a catalyst in the amount of no more than 15% of the total volume, which is disposed on the surface of the pores of the ceramic structure.

Abstract: The invention relates to a electrically conductive steel-ceramic connection comprising a steel interconnector and an electrically conductive ceramic joining layer arranged thereon. The interconnector comprises a ferritic steel containing Cr in a quantity ranging from 18 to 24% by weight. The ceramic layer contains perovskite of a formula Ln1-xSrxMn1-yCoyO3-? or Ln1-xSrxFe1-yCoyO3-?, wherein 0.1?x?0.4, 0.1?y?0.6, 0???x/2 and Ln=La—Lu. The inventive steel-ceramic connection is usable for a high-temperature fuel cell and regularly exhibits good adhesive properties and a low transition resistance (initial transition resistance R approximately equal to 0.01 ?cm2). Said steel-ceramic connection makes it possible to advantageously introduce a ferritic steel into high-temperature fuel cells. The inventive method for producing said steel-ceramic connection consists in pre-treating an inserted ceramic powder exhibiting good sinterability during an assembly process and during the fuel cell operation.

Abstract: In order to create a method for producing an electrically insulating sealing assembly for producing a seal between two components of a fuel cell stack, which allows for production of a sealing assembly that offers long-term stability during operation of a fuel cell system and provides good gas tightness and good electrical insulation properties, a method comprising the following steps is proposed: applying an insulating layer starting material onto a substrate in a wet-chemical process; heating the insulating layer starting material to a sinter temperature so as to produce a sintered, electrically insulating, ceramic insulating layer; and directly or indirectly joining the insulating layer to the components to be sealed.

Abstract: The invention relates to the hardening of the surface layer of parts of machines, plants and apparatuses and also tools. Objects for which the application is possible and advantageous are components which are subjected to severe fatigue or wear stresses and are composed of hardenable steels and have a complicated shape and whose surface has to be hardened selectively on the functional surfaces or whose functional surface has a multidimensional shape. The process for hardening the surface layer of components having a complicated shape is carried out by means of a plurality of energy input zones.

Abstract: The invention relates to an anode for a high-temperature fuel cell having an anode substrate and/or a functional anode layer, comprising a porous ceramic structure having a first predominantly electron-conducting phase with the general empirical formula Sr1-xLnxTiO3 wherein Ln=Y, Gd to Lu and 0.03<x<0.2, and having a second predominantly ion-conducting phase component comprising yttrium or scandium-stabilized zirconium dioxide (YSZ or ScSZ). In the anode substrate and/or the functional anode layer, the ratio by volume of the first phase to the second phase ranges from 80:20 to 50:50, and particularly from 70:30 to 60:40. The porosity of the entire anode ranges between 15 and 50% by volume. The anode additionally comprises a catalyst in the amount of no more than 15% of the total volume, which is disposed on the surface of the pores of the ceramic structure.

Abstract: 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.

Abstract: In order to provide a bipolar plate for a fuel cell unit, wherein the bipolar plate comprises a support layer of a metallic material and a protective layer, wherein the protective layer comprises an at least binary oxide system with at least two different types of metal cations, the protective layer of which prevents the formation of an oxide layer or changes the properties of the formed oxide layer such that lower mechanical stresses occur in the oxide layer, it is proposed that one type of metal cation of the oxide system of the protective layer is Mn and a further type of metal cation of the oxide system of the protective layer is Cu.

Abstract: A method is disclosed for producing a protective coating on a chromium oxide-forming substrate, which comprises the steps of: (a) applying on the chromium-oxide-forming substrate having at least one alloying addition selected from the group consisting of manganese, magnesium, and vanadium, a coating consisting essentially of at least one spinel-forming element selected from the group consisting of cobalt, nickel, copper and vanadium, (b) forming a chromium oxide layer at the substrate/applied coating interface, and (c) at a temperature of 500° C. to 1000° C. causing the diffusion of the at least one alloying addition through the chromium oxide layer and forming a compound thereof with the at least one spinel-forming element diffusing from the applied coating and forming between the chromium oxide layer on the substrate and the applied coating, a uniform, compact, adherent chromium-free gas-tight spinel layer.

Abstract: A method is disclosed for producing a protective coating on a chromium oxide forming substrate, in which on a surface of the chromium oxide forming substrate, a mixture of CoO, MnO, and CuO in suspension is applied, or a powdered CoO, MnO, and CuO is applied to said surface; at a temperature of 500 to 1000° C., to form a protective coating on the chromium oxide forming substrate, said protective coating consisting essentially of a uniform, gas-tight, compact, adherent chromium free spinel layer on which is coated a metal oxide layer of CoO, MnO, and CuO. Also disclosed are interconnectors for high temperature fuel cells as the chromium oxide forming substrates on which the protective coating is applied.

Abstract: The invention relates to edge layer finishing of functional components, and thereby in particular to a method for producing wear-resistant and fatigue-resistant edge layers in titanium alloys, and components produced therewith. The method according to the invention for producing wear-resistant and fatigue-resistant edge layers in titanium alloys by means of laser gas alloying is essentially characterized in that the laser gas alloying is carried out with a reaction gas that contains or releases interstitially soluble elements in the titanium alloy used, whereby the partial pressure of the reaction gas is selected such that the partial pressure remains below the threshold value above which nitride, carbide, or boride titanium phases are produced.

Abstract: The invention relates to a electrically conductive steel-ceramic connection comprising a steel interconnector and an electrically conductive ceramic joining layer arranged thereon. The interconnector comprises a ferritic steel containing Cr in a quantity ranging from 18 to 24% by weight. The ceramic layer contains perovskite of a formula Ln1-xSrxMn1-yCoyO3-? or Ln1-xSrxFe1-yCOyO3-?, wherein 0.1?x?0.4, 0.1?y?0.6, 0???x/2 and Ln=La—Lu. The inventive steel-ceramic connection is usable for a high-temperature fuel cell and regularly exhibits good adhesive properties and a low transition resistance (initial transition resistance R approximately equal to 0.01 ?cm2). Said steel-ceramic connection makes it possible to advantageously introduce a ferritic steel into high-temperature fuel cells. The inventive method for producing said steel-ceramic connection consists in pre-treating an inserted ceramic powder exhibiting good sinterability during an assembly process and during the fuel cell operation.

Abstract: The invention relates to a cathode material, particularly for use in a high-temperature fuel cell, comprising substoichiometric Ln1-x-yMyFe1-zCzO3-?, with 0.02?×x?0.05, 0.1?y?0.6, 0.1?z?0.3, 0???0.25 and with Ln=lanthanides, M=strontium or calcium and C=cobalt or copper. By using a particular production method, in which this cathode material having a specified grain size is used, and in which a (Ce, Gd)O2-?-intermediate layer is advantageously formed between the cathode and electrolyte, a cathode is obtained that, when used in a high-temperature fuel cell, can achieve a power greater than 1 W/cm2 already at 750° C. and a cell voltage of 0.7 V.