Altech Advanced Materials AG has commissioned its pilot plant for a new type of silicon-based anode material. According to the company, all production steps at the plant in Schwarze Pumpe in Saxony have been successfully commissioned. The first batches of 30 kilograms of the so-called Silumina anode material have already been produced. The material is a mixture of graphite and aluminum-coated silicon. Production is being carried out in batch mode and will be ramped up to full capacity in the coming weeks.
Up to 55 percent higher energy density
According to Altech, the material increases the energy density of conventional lithium-ion batteries by up to 55 percent under laboratory conditions. This increase in performance is based on the theoretically higher storage volume of silicon compared to graphite. Technical challenges, in particular the significant volume increase of silicon during charging as well as high initial charging losses, are to be reduced by a nanoscale aluminum oxide coating. Fraunhofer IKTS is currently investigating the coatingʼs effectiveness. Altech intends to send the first samples to potential customers in the battery and automotive industries in the coming months. According to the company, agreements have already been made.
Source:
https://www.altechadvancedmaterials.com/wp-content/uploads/2025/05/2025-05-06_CN_DE.pdf
