Today's highly optimized lithium-ion batteries place high demands on materials and production technology. In addition, the annual production volume has been increasing for many years. Battery recycling is increasingly coming to the fore in terms of the sustainable circular economy, which leads to an accumulation of impurities in the active materials of lithium batteries. In order to gain deeper insights into the influence of material impurities on the mechanical and thermal properties of the material system, thin fiber optic sensors are integrated into the battery cells. The resulting data on the internal processes of the battery will be used to parameterize an electrochemical model and thus investigate critical battery conditions in greater depth. Following validation on battery cells made from primary material and material from recycled material, the aim is to provide reliable recommendations on purity in terms of battery safety.

Further information: CircularLIB - Project 2-7