Separation layer for separating anode and cathode in lithium ion accumulators or batteries
AssigneeCeramTec GmbH
InventorsAlfons Kelnberger, Hans-Jürgen Schreiner
Life of this patent
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Abstract
Electronic short-circuiting between the anode and cathode in Li ion accumulators or batteries, an electronic separate of anode must be present with minimum electronic conductivity. To this end, in general a separating layer in the form of porous films, non-woven fabrics or nets made of polypropylene or similar polymers and containing Li ion-conducting salts and ceramic particles is used. Disadvantages of the known separating layers are the low thermal resistance and thereby embodiments with a high energy content, expensive manufacturing processes and complex interaction of the chemical substances used in the separating layers.
Claims25
1-24. (canceled)
A separating layer for separating the anode and cathode in Li-ion accumulators or batteries, wherein the separating layer comprises a salt conducting Li-ions and ceramic particles, wherein the salts conducting Li-ions and the ceramic particles are embedded in an organic matrix of a polymer or polymer-like substances.
A method for producing a separating layer for separating the anode and cathode in Li-ion accumulators or batteries, wherein the separating layer has salts conducting Li-ions and ceramic particles, characterised by the following steps:
- production of a homogeneous, organic solution consisting of polymers or polymer-like substances and solvents, addition of electrolytic salts conducting Li-ions and of ceramic particles, production of a homogeneous slip and conversion of this slip into a thin foil and drying of this foil.
A method according to 39, wherein ceramic powder is added to the organic solution in a proportion of up to 90% by weight.
Dependencies are inferred from the claim text.