Use of material based on glass, comprising mixture of silicon dioxide, fluorine and phosphorus pentoxide, and aluminum oxide, useful for producing separator for electrochemical energy storage, preferably for lithium ion accumulator

摘要

Use of a material based on glass, comprising (in wt.%, based on oxide) a mixture of silicon dioxide, fluorine and phosphorus pentoxide (20-95) and aluminum oxide (0.5-30), for producing a separator for an electrochemical energy storage, preferably for a lithium ion accumulator, is claimed. The density of the material is less than 3.7 g/cm 3. Independent claims are also included for (1) electrochemical energy storage, preferably lithium-ion accumulator comprising a housing for accommodating a positive and a negative electrode, and an electrolyte with the separator for the separation of the two electrodes from each other, where the separator is the above material based on glass; (2) a separator for an electrochemical energy storage which is formed by coating at least one electrode of the energy store with the above material based on glass; and (3) producing the separator for an electrochemical energy storage, comprising providing at least an electrode, providing the above material based on glass and converting it into a powder form or slurry form, applying it to the electrode and solidified.