Energy Solutions
Conductive Additives and Battery Slurries
The majority of active materials are oxides with limited electrical conductivity. That is why additives that reduce the required charging time of the battery are added to the battery slurries.
Aquí se utilizan principalmente las materias primas a base de carbono, como el negro de humo, el grafito y los nanotubos de carbono (CNT), que deben caracterizarse por la mayor relación de aspecto posible. En primer lugar, los materiales deben dispersarse o deslaminarse cuidadosamente en etapas preliminares. Aquí, el tamaño de las partículas primarias, las propiedades de los sólidos a granel y los requisitos de pureza suelen presentar retos particulares, que NETZSCH resuelve con el Epsilon y el s-Jet®.
Battery Slurries
PMH planetary mixers have established themselves as state of the art for the production of so-called battery slurries. Via the planetary mixer's rotating tool system, the conductive carbon black agglomerates can be broken up or active materials can be dry processed in an intensive kneading phase.
However, depending on the material system used, the binder can also be dissolved first and very gently mixed after addition of the active materials. To prevent defects in the coating due to gas inclusions, the mixing process is typically carried out under a vacuum. This way, pockets of air that have entered via the raw materials can be removed from the product.
The key aspects for selection of the PMH planetary mixer are the excellent temperature control and the broad viscosity range for which this machine is suited.
