Method for producing cathodes
AssigneeBASF SE
InventorsSimon Schroedle, Martin Schulz-Dobrick
Life of this patent
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Abstract
Process for producing cathodes Process for producing cathodes comprising a cathode material comprising (A) at least one lithiated transition metal mixed oxide, (B) carbon in an electrically conductive modification, (C) at least one binder, and also (D) at least one film, wherein (a) a mixture comprising lithiated transition metal mixed oxide (A), carbon (B) and binder (C) is applied to film (D), (b) dried, (c) compacted to such an extent that the cathode material has a density of at least 1.8 g/cm3 to obtain a compacted blank and (d) after compaction as per (c) thermally treated at a temperature in the range from 35° C. below the melting point or the softening point of binder (C) to a maximum of 5° C. below the melting point or the softening point of binder (C).
Claims12
A process for producing a cathode comprising a cathode material comprising:
- (A) a lithiated transition metal mixed oxide;
- (B) carbon in an electrically conductive modification;
- (C) a binder;
- and
- (D) a film, the process comprising:
- (a) applying a mixture comprising a lithiated transition metal mixed oxide (A), a carbon (B) and a binder (C) to a film (D), to form a coated film;
- (b) drying the coated film;
- (c) compacting the coated film to such an extent that a resulting cathode material on the film has a density of at least 1.8 g/cm3 to obtain a compacted blank;
- and
- (d) thermally treating the compacted blank either at a temperature in the range from 35° C. below a melting point of binder (C) to a maximum of 5° C. below the melting point of binder (C) or, if the binder (C) does not have a sharp melting point, at a temperature of 35° C. below a softening point of the binder (C) to a maximum of 5° C. below the softening point of binder (C);
- wherein the binder (C) is a fluorinated organic (co)polymer.
Dependencies are inferred from the claim text.