Abstract: One aspect relates to a piezoresistive material, a detection unit having such piezoresistive material, and a method for producing such piezoresistive material. Further, several uses of the material uses of the piezoresistive material or the detection unit are described. The piezoresistive material includes a compound of a carbon component and an elastomer component. The carbon component includes carbon particles including macropores. The elastomer component includes polymeric chains. At least some of the macropores in the carbon particles are infiltrated by polymeric chains to form a piezoresistive interconnection between the carbon particles.

Abstract: The invention relates to a composite made of a porous carbon and an active material containing sulphur and to method for producing same. A method for producing a composite made of a porous carbon structure and sulphur is disclosed, said composite being characterized by a high capacitance and a low capacitance loss, when used as an electrode material for a lithium-sulphur secondary battery. According to the invention, a dispersion of carbon powder, an active material containing sulphur and an aqueous medium are treated hydrothermally at a temperature sufficient for melting sulphur. The liquid phase which forms, which contains the melted sulphur and water, infiltrates the pores of the porous carbon.

Abstract: A known method for producing porous graphitized carbon material covered with metal nanoparticles involves infiltrating a porous template framework of inorganic material with a carbon precursor. After thermal treatment of the precursor, the template is removed and the particulate porous carbon material is covered with a catalytically active substance. According to the invention, in order to keep the proportion of the noble metal loading at a low level, the thermal treatment of the precursor first involves carbonization, and the material is not graphitized into graphitized, particulate, porous carbon material until the template has been removed. The graphitized carbon material has a hierarchical pore structure with a pore volume of at least 0.5 cm3/g and at least 75% of the pore volume is apportioned to macropores with, size 100 to 5000 nm. Before covering with catalytically active substance, the carbon material is subjected to an activation treatment in an oxidizing atmosphere.

Abstract: One aspect is a production process including feeding a feed material composition into a reaction zone at a feeding position, wherein the feed material composition is liquid or gaseous or both; reacting the feed material composition in the reaction zone into a first plurality of particles by a chemical reaction; depositing the first plurality of particles onto a substrate surface of a substrate, thereby obtaining a porous silicon dioxide material, having a pore structure, in the form of up to 20 layers superimposing the substrate surface; at least partially removing the porous silicon dioxide material from the substrate surface; and modifying the pore structure of the porous silicon dioxide material, thereby obtaining the porous silicon dioxide material having a further pore structure.

Abstract: A composition comprising (i) a matrix comprising a metal oxide, metal sulphide and/or metal selenide as the matrix material, the metal oxide, metal sulphide and/or metal selenide comprising at least two metals M1 and M2, and (ii) a metal M3 which is mobile in the matrix. The atomic ratio of M1 to M2 is within the range of 75:25 to 99.99:0.01; the valence states of M1, M2 and M3 are all positive; the valence state of M1 is larger than the valence state of M2; the valence state of M2 is equal to or larger than the valence state of M3; and the metals M1, M2 and M3 are different.

Abstract: In a known composite material with a fused silica matrix there are regions of silicon-containing phase embedded. In order to provide a composite material which is suitable for producing components for use in high-temperature processes for heat treatment even when exacting requirements are imposed on impermeability to gas and on purity, it is proposed in accordance with the invention that the composite material be impervious to gas, have a closed porosity of less than 0.5% and a specific density of at least 2.19 g/cm3, and at a temperature of 1000° C. have a spectral emissivity of at least 0.7 for wavelengths between 2 and 8 ?m.

Abstract: The invention relates to a method for producing a core card (20) with at least the steps of a) providing a reprocessed fibrous mixture having at least the following properties: the Brecht-Holl fine fraction is at most 50% by weight; the Brecht-Holl long fiber fraction is at least 10% by weight; the Brecht-Holl short fiber fraction is at most 60% by weight; and the ISO 1762 ash fraction is at most 20% by weight, b) preparing at least one fibrous suspension, c) processing the at least one fibrous suspension by carrying out at least one de-ashing of the fibrous suspension until the ash fraction of the dry component of the fibrous suspension is at most 15% by weight, and by adding at least one additive to the at least one fibrous suspension d) producing the laminar system from the at least one fibrous suspension.

Abstract: The invention relates to a method for economically producing a composite powder made of carbon and electrochemical active material. According to the invention, a melt made of a meltable carbon precursor substance having nanoparticles made of an active material distributed in the melt is provided, and said melt is divided into the composite powder, in which nanoparticles made of the active material are embedded in a matrix made of the carbon precursor substance. A porous composite material produced using the composite powder is used to produce an electrode for a secondary battery, in particular for use as an anode material.

Abstract: In a known composite material with a fused silica matrix there are regions of silicon-containing phase embedded. In order to provide a composite material which is suitable for producing components for use in high-temperature processes for heat treatment even when exacting requirements are imposed on impermeability to gas and on purity, it is proposed in accordance with the invention that the composite material be impervious to gas, have a closed porosity of less than 0.5% and a specific density of at least 2.19 g/cm3, and at a temperature of 1000° C. have a spectral emissivity of at least 0.7 for wavelengths between 2 and 8 ?m.

Abstract: In order to provide an inexpensive product composed of a porous carbon provided with electrochemical active material, said product being suitable particularly for use as a cathode or anode material for a secondary battery, a process comprising the following process steps is proposed: (a) producing a template from inorganic material by gas phase deposition, said template comprising a framework of pores and nanoparticles joined to one another, (b) coating the template framework with an electrochemical active material or a precursor thereof, (c) infiltrating the pores of the template with a precursor substance for carbon, (d) carbonizing the precursor substance to form a carbon layer, (f) removing the template.

Abstract: The invention relates to a composite made of a porous carbon and an active material containing sulphur and to method for producing same. A method for producing a composite made of a porous carbon structure and sulphur is disclosed, said composite being characterised by a high capacitance and a low capacitance loss, when used as an electrode material for a lithium-sulphur secondary battery. According to the invention, a dispersion of carbon powder, an active material containing sulphur and an aqueous medium are treated hydrothermally at a temperature sufficient for melting sulphur. The liquid phase which forms, which contains the melted sulphur and water, infiltrates the pores of the porous carbon.

Abstract: Methods for producing porous carbon product utilize template material in the form of template particles containing macropores and a polymerizable carbon precursor substance. The macropores of the template are infiltrated with the precursor substance in dissolved or melted form. After carbonization of the infiltrated precursor substance, the template is removed to form the porous carbon product. In order to obtain a carbon structure with hierarchical porosity having a high fraction of mesopores having pore sizes in the range of 2 to 50 nm, after the infiltration and before carbonization, the precursor substance within the macropores of the template is subjected to a treatment at a foaming temperature at which the precursor substance foams under polycondensation and fills the macropores as substantially mesoporous foam, in which at least 70% of the pores have pore sizes in the range of 10 to 150 nm.

Abstract: A known method for producing porous graphitized carbon material covered with metal nanoparticles involves infiltrating a porous template framework of inorganic material with a carbon precursor. After thermal treatment of the precursor, the template is removed and the particulate porous carbon material is covered with a catalytically active substance. According to the invention, in order to keep the proportion of the noble metal loading at a low level, the thermal treatment of the precursor first involves carbonization, and the material is not graphitized into graphitized, particulate, porous carbon material until the template has been removed. The graphitized carbon material has a hierarchical pore structure with a pore volume of at least 0.5 cm3/g and at least 75% of the pore volume is apportioned to macropores with, size 100 to 5000 nm. Before covering with catalytically active substance, the carbon material is subjected to an activation treatment in an oxidizing atmosphere.

Abstract: A method for producing carbon particles having a core/shell structure includes infiltrating a pore-containing template material with a first precursor for carbon of a first variety, carbonizing the first precursor to form a deposit of the carbon of the first variety, infiltrating the remaining pore space with a second precursor for carbon of a second variety to form a second deposit of the carbon of the second variety which has a second porosity lower than the first porosity, and removing the template material to form the carbon particles. The template material is provided as template particles and the first precursor is provided as precursor particles of meltable and polymerizable material. The infiltration occurs in the molten phase so that the first precursor is foamed before or during the carbonization to form a pore-containing carbon foam. In an intermediate product, pores of the template material are at least partially filled.

Abstract: A product surface including a first optoelectronically readable code formed by an arrangement of planar cells of a first and a second cell type. The code has a large detectable region and the readability thereof is robust in relation to demands during the production and/or the use of the surface. The cells, as integral components of the surface, have a surface profile. An intensity difference ?I=I2?I1 in the intensity I2 reflected by the surface profile of the second cell type and intensity I1 reflected by the surface profile of the first cell type results in the case of light incidence as a result of the configuration of the surface profiles. The surface has a second code. The maximum of the absolute intensity difference |?I1| of the first code lies in a different reflection direction than the maximum of the absolute intensity difference |?I2| of the second code.

Abstract: Inexpensive product consisting of porous carbon, with a pore structure which is suitable for retaining electrode parts which can be used in particular for a use as an electrode material for a lithium-sulphur secondary battery, and a method comprising the following method steps: (a) providing a template consisting of inorganic material which contains spherical nanoparticles and pores, (b) infiltrating the pores of the template with a precursor for carbon of a first variety, (c) carbonizing so as to form an inner layer on the nanoparticles with a first microporosity, (d) infiltrating the remaining pores of the template with a precursor substance for carbon of a second variety, (e) carbonizing the precursor substance, wherein an outer layer with a second microporosity which is lower than the first microporosity is produced on the inner layer, and (f) removing the template so as to form the carbon product with layer composite structure, comprising an inner layer consisting carbon with a first, relatively high mic

Abstract: Methods for producing porous carbon product utilize template material in the form of template particles containing macropores and a polymerizable carbon precursor substance. The macropores of the template are infiltrated with the precursor substance in dissolved or melted form. After carbonization of the infiltrated precursor substance, the template is removed to form the porous carbon product. In order to obtain a carbon structure with hierarchical porosity having a high fraction of mesopores having pore sizes in the range of 2 to 50 nm, after the infiltration and before carbonization, the precursor substance within the macropores of the template is subjected to a treatment at a foaming temperature at which the precursor substance foams under polycondensation and fills the macropores as substantially mesoporous foam, in which at least 70% of the pores have pore sizes in the range of 10 to 150 nm.

Abstract: A product surface including a first optoelectronically readable code formed by an arrangement of planar cells of a first and a second cell type. The code has a large detectable region and the readability thereof is robust in relation to demands during the production and/or the use of the surface. The cells, as integral components of the surface, have a surface profile. An intensity difference ?I=I2?I1 in the intensity I2 reflected by the surface profile of the second cell type and intensity I1 reflected by the surface profile of the first cell type results in the case of light incidence as a result of the configuration of the surface profiles. The surface has a second code. The maximum of the absolute intensity difference |?I1| of the first code lies in a different reflection direction than the maximum of the absolute intensity difference |?I2| of the second code.

Abstract: Known lithium-ion cells for a secondary battery including an electrode have an active material layer containing active material particles in contact with a non-aqueous electrolyte and a particulate, porous additive. Using this as a basis, it is desired to achieve an improvement in the lithium-ion cells in respect of their gravimetric and volumetric energy density and in respect of inexpensive and reproducible production, and in particular to ensure that the desired properties of the active material layer are not changed, or are not changed to an unacceptable degree, by compression during calendering. Accordingly, it is proposed to use, as an additive, porous carbon particles having a porosity in the range between 50% and 95% and having macropores which are fluidically connected to one another and which are delimited by carbon walls having an average wall thickness in the range of 5 to 500 nm.

Abstract: For use as electrode material for a lithium battery, porous templates are impregnated with a carbon feedstock that can be graphitized. This frequently results in only a low thickness of the deposited, graphite-like layer, such that generally several such infiltration and carbonation processes must be carried out consecutively.