Abstract: A method for producing a porous element is presented. A powdery metal-ceramic composite material is produced. The composite material has a metal matrix and a ceramic portion amounting to less than 25 percent by volume. The metal matrix is at least partially oxidized to obtain a metal oxide. The metal-ceramic composite material is grinded and mixed with powdery ceramic supporting particles to obtain a metal-ceramic/ceramic mixture. The metal-ceramic/ceramic mixture is shaped into the porous element. The porous element can be used as an energy storage medium in a battery.

Abstract: A stack for an electrical energy accumulator is provided having at least one storage cell, which in turn has a storage electrode and an air electrode that is connected to an air supply device, the air supply device having an air distribution plate, wherein the stack also has a water vapor supply device which is in contact with the storage electrode and the air distribution plate has at least one element of the water vapor supply device.

Abstract: A contact unit for an electromechanical switching device includes a carrier element and a contact element connected to the carrier element. The contact element has a silver-containing layer that provides a contact area for making releasable contact with a further contact area of the switching device depending on a switching state of the switching device. The silver-containing layer includes diamond particles at least in the region of the contact area.

Abstract: A storage cell has an air electrode, connected to an air supply device, and a storage device. Channels for receiving a storage medium rest on the storage electrode. In addition, partition walls for partitioning off the channels with respect to one another are provided. The partition walls have a recess in the region of the storage electrode. This recess serves the purpose of spacing apart the storage medium from the storage electrode.

Abstract: The invention relates to a light source (1) comprising a light generating unit (2) like an organic light emitting diode and an outcoupling device (3) for coupling light out of the light generating unit in an outcoupling direction (4). The outcoupling device comprises a first region (5) for facing the light generating unit, a second region (7) having a refractive index being smaller than the refractive index of the first region, and a structured intermediate region (6) between the first region and the second region. The first region is optically homogenous and has a thickness in the outcoupling direction being larger than a coherence length of the light, thereby reducing generally possible wavelength dependent interference effects and, thus, a corresponding degradation of the outcoupling efficiency. The outcoupling efficiency can therefore be increased.

Abstract: An energy store is provided, having at least one stack, each stack having at least one storage cell, which in turn has an air electrode and a storage electrode. The storage electrode is adjacent to channels, which contain a storage medium and water vapor. The channels have a larger cross-sectional area than the cross-section of the storage medium, which condition causes unhindered spreading of a reaction gas in the area between the storage electrode and the storage medium.

Abstract: An electrical energy store having at least one stack with in each case at least one storage cell. Each storage cell has an air electrode, which is connected to an air supply apparatus, and a storage electrode. The storage electrode adjoins channels which contain a storage medium and a steam/hydrogen mixture. A reservoir of steam/hydrogen is provided, the reservoir being directly connected to the channels.

Abstract: A method is provided for connecting an electrically conductive contact element to at least one electrically conductive fuel cell component associated with a fuel cell. A contact element that is soluable in a solvent, and an electrically conductive fuel cell component are provided. A solvent is applied to the contact element and/or the fuel cell component. The contact element is arranged on the fuel cell component. The solvent is evaporated to form a contact between the contact element and the fuel cell component.

Abstract: A contact unit for an electromechanical switching device includes a carrier element and a contact element connected to the carrier element. The contact element has a silver-containing layer that provides a contact area for making releasable contact with a further contact area of the switching device depending on a switching state of the switching device. The silver-containing layer includes diamond particles at least in the region of the contact area.

Abstract: A storage cell has an air electrode, connected to an air supply device, and a storage device. Channels for receiving a storage medium rest on the storage electrode. In addition, partition walls for partitioning off the channels with respect to one another are provided. The partition walls have a recess in the region of the storage electrode. This recess serves the purpose of spacing apart the storage medium from the storage electrode.

Abstract: A rechargeable energy storage unit is proposed. The rechargeable energy storage unit has a first and a second electrode. The first electrode is associated with metallic particles composed of a metal which can be reduced during charging operation of the energy storage unit and can be oxidized during discharging operation of the energy storage unit. The rechargeable energy storage unit has an electrolyte arranged between the electrodes. The metallic particles additionally contain a material which constrains sintering of the metallic particles.

Abstract: An energy store is provided, having at least one stack, each stack having at least one storage cell, which in turn has an air electrode and a storage electrode. The storage electrode is adjacent to channels, which contain a storage medium and water vapor. The channels have a larger cross-sectional area than the cross-section of the storage medium, which condition causes unhindered spreading of a reaction gas in the area between the storage electrode and the storage medium.

Abstract: An optoelectronic device comprising at least one optoelectronic active region comprising at least a rear electrode and a front electrode between which an organic optoelectronic material is sandwiched, said rear electrode being reflective, and a cover layer arranged in front of said front electrode. The cover layer comprises a material with light-scattering particles of a first material dispersed in a transparent matrix of at an least partly hydrolyzed silica sol. Due to the highly scattering propertied of the cover layer, the device is essentially concealed behind the cover layer when not in its operative state.

Abstract: An electrical energy store having at least one stack with in each case at least one storage cell. Each storage cell has an air electrode, which is connected to an air supply apparatus, and a storage electrode. The storage electrode adjoins channels which contain a storage medium and a steam/hydrogen mixture. A reservoir of steam/hydrogen is provided, the reservoir being directly connected to the channels.

Abstract: A planar high temperature fuel cell, a use and a method of manufacture are discloses. The planar high-temperature fuel cell with includes a layer structure. The layer structure includes a cathode layer, an anode layer and a solid electrolyte layer disposed between the cathode layer and the anode layer. Each of the layers are planar. A porous metal structure is used as the support for the layer structure and is also planar.

Abstract: A stack for an electrical energy accumulator is provided having at least one storage cell, which in turn has a storage electrode and an air electrode that is connected to an air supply device, the air supply device having an air distribution plate, wherein the stack also has a water vapour supply device which is in contact with the storage electrode and the air distribution plate has at least one element of the water vapour supply device.

Abstract: A luminous body is described, in particular in the form of a planar lighting device for general lighting or for backlighting of displays, which luminous body comprises a plurality of light sources, for example LED elements, arranged in a housing, in particular an optical waveguide plate. The optical waveguide plate forms a first optical medium with a first optical scattering power, into which the light of the light sources is coupled. Furthermore, at least one second optical medium with a second optical scattering power is provided, such that the light propagating in the second optical medium is at least substantially coupled in from the first optical medium, and the scattering power of at least one of the media is chosen for the purpose of influencing the flow of light in the housing such that a given brightness distribution of the light on the light emission surface is achieved.

Abstract: The invention relates to alighting apparatus comprising a light emission unit (2) for emitting light (3) from an emission surface (4) in a main emission direction (6), and an outcoupling unit (7) for coupling the light out of the light emission unit. The outcoupling unit comprises a first surface (8) having a first central region (9) optically coupled to the emission surface and a first peripheral region (10) enclosing the first central region, and a second surface (11) opposite to the first surface. The peripheral regions can be structured, wherein the ratio of a) the area of the emission surface to b) the area of the first surface or the second surface is smaller than 0.5. This configuration can significantly decrease the likelihood of reabsorption of light by the emission surface, thereby increasing the efficiency of extracting light out of the lighting apparatus.

Abstract: The invention relates to a light source (1) comprising a light generating unit (2) like an organic light emitting diode and an outcoupling device (3) for coupling light out of the light generating unit in an outcoupling direction (4). The outcoupling device comprises a first region (5) for facing the light generating unit, a second region (7) having a refractive index being smaller than the refractive index of the first region, and a structured intermediate region (6) between the first region and the second region. The first region is optically homogenous and has a thickness in the outcoupling direction being larger than a coherence length of the light, thereby reducing generally possible wavelength dependent interference effects and, thus, a corresponding degradation of the outcoupling efficiency. The outcoupling efficiency can therefore be increased.

Abstract: A luminous body is described, in particular in the form of a planar lighting device for general lighting or for back-lighting of displays, which luminous body comprises a plurality of light sources (2), for example LED elements, arranged in a housing (10), in particular an optical waveguide plate (1). The optical waveguide plate (1) forms a first optical medium (1) with a first optical scattering power, into which the light of the light sources (2) is coupled. Furthermore, at least one second optical medium (5) with a second optical scattering power is provided, such that the light propagating in the second optical medium (5) is at least substantially coupled in from the first optical medium (1), and the scattering power of at least one of the media is chosen for the purpose of influencing the flow of light in the housing (10) such that a given brightness distribution of the light on the light emission surface (4) is achieved.