Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Praunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung

Jochen Schilm

Mihails Kusnezoff

Nikolai Trofimenko

Uwe Partsch

Stefan Megel

Mareike Wolter

Axel Rost

Lutz Schadt

Kristian Nikolowski

Christian Freytag

Dörte Wagner

The invention relates to an arrangement of electrochemical cells and also to the uses thereof. The electrochemical cells are arranged one above another and are in electrically conducting communication with one another. In this arrangement they form repeating units which in each case are formed of at least one interconnector, in which apertures for gas passage are formed, an electrochemical cell, which is formed of a cathode, an electrolyte and an anode, and contact elements on the anode side and on the cathode side, and are arranged one above another. The area of the individual planar electrochemical cells is in each case smaller than the area of the individual interconnectors, and the electrolytes finish flush in each case with a plane of a surface of the respective interconnector. Mounted on this surface of the interconnector in each case is a single sealing ply of a glass solder with constant thickness, for sealing the gap between electrolyte and interconnector (internal joining) and the gaps between apertures for gas passage of two adjacent interconnectors (external joining).

Arrangement of electrochemical cells and the use of the same

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 10Scmand which is gas-impervious is formed on the surface facing the cathode. In this respect, the carrier substrate has greater mechanical strength and a larger layer thickness than the at least one layer.

Solid-state electrolyte for use in lithium-air batteries or in lithium-water batteries

A composition is for the manufacture of glass solders for high-temperature applications up to temperatures of approximately 1000&#xb0; C., which composition, having no ZrO, has SiOat a proportion in the range from 48 mol-% to 62 mol %, AlOat a proportion in the range from 0.5 mol % to 6 mol %, BOat a proportion in the range 4 mol % to 12 mol %, BaO at a proportion in the range 12 mol % to 30 mol %, and either CaO at a proportion in the range from 2.5 mol % to 15 mol %, or an ROat a proportion in the range 0.5 mol % to 20 mol % where the ROis selected from LaO, YO, ScO, and from a further oxide of a chemical element from the series of lanthanoids, wherein the SiO:BaO ratio is in the range from 1.9 to 4.

Composition for producing glass solders for high-temperature applications and use thereof

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Dresden, Germany

Jochen Schilm