US 11,942,625 B2
Method for producing a homogenized mixture of carbon, sulfur, and PTFE
Frank Winter, Mühlheim (DE); and Regina Dambach, Offenbach (DE)
Assigned to NETZSCH Trockenmahltechnik GmbH, Hanau (DE)
Filed by NETZSCH Trockenmahltechnik GmbH, Hanau (DE)
Filed on Nov. 16, 2021, as Appl. No. 17/455,053.
Claims priority of application No. 10 2020 131 233.4 (DE), filed on Nov. 25, 2020.
Prior Publication US 2022/0166005 A1, May 26, 2022
Int. Cl. H01M 4/36 (2006.01); B02C 13/22 (2006.01); B02C 21/00 (2006.01); C08F 14/26 (2006.01); C08K 3/04 (2006.01); C08K 3/06 (2006.01); H01M 4/587 (2010.01); H01M 4/62 (2006.01); H01M 10/052 (2010.01)
CPC H01M 4/364 (2013.01) [B02C 21/00 (2013.01); C08F 14/26 (2013.01); C08K 3/04 (2013.01); C08K 3/06 (2013.01); H01M 4/587 (2013.01); H01M 4/623 (2013.01); H01M 10/052 (2013.01); B02C 13/22 (2013.01); C08K 2201/001 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for producing a homogenized mixture of carbon, sulfur, and PTFE, comprising:
liquefying sulfur into liquid sulfur,
providing carbon in a form of carbon particles,
combining the liquid sulfur with the carbon,
introducing the combination of the liquid sulfur and the carbon into a mill,
grinding the liquid sulfur together with the carbon for a first time via the mill, so that the liquid sulfur is absorbed by pores of the carbon particles and forms a powdery composite with the carbon particles, and
adding PTFE with the powdery composite to form a mixture, and then grinding for a second time the mixture to homogenize the mixture, wherein said grinding for the second time is performed in the mill or in another mill,
wherein the step of liquefying sulfur into liquid sulfur includes feeding the liquid sulfur to an injector and guiding the liquid sulfur via a feed line from the injector towards the mill, and
wherein the step of combining the liquid sulfur with the carbon includes feeding the carbon into the feed line to form the combination of the liquid sulfur and the carbon.