Imerys Graphite & Carbon Switzerland Ltd.

Imertech Sas

Michal Gulas

Michael Spahr

Pirmin Ulmann

Simone Zürcher

Raffaele Gilardi

Flavio Mornaghini

Simone Zurcher

Pascual Perez

Tatsuo Umeno

Michael E Spahr

Pirmin A Ulmann

The present disclosure relates to novel particulate composite materials comprising a graphitic core particle associated with SiOx nanoparticles (0.2&#x2264;X&#x2264;1.8), and coated by a layer of non-graphitic carbon, e.g., pyrolytic carbon deposited by chemical vapor deposition (CVD). Also included are processes for making such particles as well as uses and downstream products for the novel composite material, in particular as an active material in negative electrodes in Li-ion batteries.

Carbon-coated silicon oxide/graphite composite particles, methods of making, and applications of the same

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.

Hydrophilic surface-modified carbonaceous particulate material

Surface-modified, low surface area synthetic graphite may have a BET surface from 1.0 to 4.0 m/g and a crystallite size Lto crystallite size Lratio of greater than 1. Processes for modifying the surface of low surface area synthetic graphite may result in surface-modified, low surface area synthetic graphite have a BET surface from 1.0 to 4.0 m/g and a crystallite size Lto crystallite size Lratio of greater than 1. Such synthetic graphite may have many uses, including for example, as a negative electrode material in lithium-ion batteries.

Surface-modified low surface area graphite, processes for making it, and applications of the same

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Malvaglia, Switzerland

Michal Gulas