US 9,812,696 B2
Method for producing cathodes
Simon Schroedle, Iselin, NJ (US); and Martin Schulz-Dobrick, Mannheim (DE)
Assigned to BASF SE, Ludwigshafen (DE)
Appl. No. 14/437,553
Filed by BASF SE, Ludwigshafen (DE)
PCT Filed Oct. 11, 2013, PCT No. PCT/EP2013/071286
§ 371(c)(1), (2) Date Apr. 22, 2015,
PCT Pub. No. WO2014/063934, PCT Pub. Date May 1, 2014.
Claims priority of application No. 12189539 (EP), filed on Oct. 23, 2012.
Prior Publication US 2015/0280206 A1, Oct. 1, 2015
Int. Cl. H01M 4/04 (2006.01); H01M 4/1391 (2010.01); H01M 10/0525 (2010.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01)
CPC H01M 4/04 (2013.01) [H01M 4/0402 (2013.01); H01M 4/043 (2013.01); H01M 4/0404 (2013.01); H01M 4/0435 (2013.01); H01M 4/0471 (2013.01); H01M 4/1391 (2013.01); H01M 10/0525 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); Y10T 29/301 (2015.01); Y10T 29/49108 (2015.01)] 12 Claims
1. 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.