Hydrophilic surface-modified carbonaceous particulate material
AssigneeImerys Graphite & Carbon Switzerland SA
InventorsMichal Gulas, Pirmin Ulmann, Simone Zürcher, Michael Spahr
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Abstract
The present disclosure relates to a novel surface-modified carbonaceous particulate material having a hydrophilic non-graphitic carbon coating. The material can for example be produced by CVD-coating of a carbonaceous particulate material such as graphite followed by an oxidation treatment under defined conditions. The resulting material exhibits a more hydrophilic surface compared to an unmodified CVD-coated carbon material, which is desirable in many applications, such as when used as an active material in the negative electrode of lithium ion batteries or in a polymer composite material.
Claims17
A surface-modified carbonaceous particulate material comprising carbonaceous core particles with a hydrophilic non-graphitic carbon coating, wherein the hydrophilic surface-modified carbonaceous particulate material has a BET specific surface area (BET SSA) of below 49 m2/g;
- and having an oxygen content of greater than about 200 ppm and up to 1700 ppm.
A surface-modified carbonaceous particulate material comprising carbonaceous core particles with a hydrophilic non-graphitic carbon coating, wherein a ratio between a BET SSA and a specific surface energy of the hydrophilic surface-modified carbonaceous particulate material is less than 0.8;
- and having an oxygen content of greater than about 200 ppm and up to 1700 ppm.
A dispersion comprising a liquid and a surface-modified carbonaceous particulate material comprising carbonaceous core particles with a hydrophilic non-graphitic carbon coating, wherein the dispersion comprises 40 weight % of said carbonaceous material and has a viscosity of 2,000 to 4,000 mPa·s;
- and wherein the surface-modified carbonaceous particulate material has an oxygen content of greater than about 200 ppm and up to 1700 ppm.
Dependencies are inferred from the claim text.