Batteries and Fuel Cells
The increasing capacity of batteries and rechargeable batteries accelerates and promotes their use in a great variety of technical applications.
Furthermore, with the current shift of emphasis within the energy industry from fossil to renewable energy sources, hydrogen will become more significant as a source of energy and fuel cells will gain in importance as highly-efficient energy conversion systems.
Graphite, and especially natural graphite, is a key raw material in the production of innovative energy storage and conversion systems.
In various battery systems, such as AlMn, NiCd and zinc-carbon cells, graphite is used as a chemically inert and oxidation-stable conductivity additive.
In such cases, the purity requirements for graphite may be as high as 99.99 % carbon, and such degrees of purity can only be reached using sophisticated purification processes.
Li-ion/ Li-polymer cells
In state-of-the-art Li-ion or Li-polymer batteries, graphite plays an active role as an anode material into which Li-ions are intercalated. This intercalation process is only possible due to the layered crystal structure of graphite.
In PEM fuel cells, graphite will play an important role in future as the preferred raw material for bipolar plates. Natural graphite combines the following unique properties: highly conductive, chemically inert, with an extremely low permeation coefficient, mechanically stable and available at a favourable price. With our extensive product range, we can provide suitable materials for any bipolar plate production concept. We supply graphite grades for the production of graphite foils and graphite blocks as well as for injection moulding.