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Siridion® Black

Siridion® Black is a new anode material for lithium-ion batteries. It makes batteries more powerful by increasing energy density and improving the fast-charging capability and energy efficiency.

Customized solutions for powerful batteries

Until now, graphite has been used as an anode material in lithium-ion batteries, but batteries with a higher capacity need new materials that also allow faster charging. As an additive, our solution can be quickly integrated into existing anode materials and production processes, and it combines well with other battery materials.

The powder is produced by gas phase synthesis. It consists of isolated unsintered spherical particles that are a few hundred nanometers in size. Within the amorphous particles, the carbon concentration increases from the inside out. This ensures superior stability. In addition, due to the higher carbon content on the surface, the particles are better protected against oxidation and easier to process.

The high-performance anode material was jointly developed by the Research, Development & Innovation Function and the Silanes Business Line of Evonik. They are working on making lithium-ion batteries even more powerful in a joint project with the University of Duisburg-Essen that is being funded by the German Federal Ministry of Economic Affairs and Energy until 2023 (funding code: 03EI3027B).

Siridion® Black enables customized solutions: it gives anode manufacturers and their customers the necessary flexibility to adapt their batteries exactly to their respective needs. Manufacturers of wearables or mobile devices, in particular, are likely to appreciate this design freedom.

The carbon-covered silicon is now available on an industrial scale. It will be showcased to the public at the China International Battery Fair, which will take place from March 19 to 21 in Shenzen, China. Evonik’s experts are available at booth 1GT087.