In order to increase the electrochemical stability of a cathode material for lithium cells, the cathode material includes an iron-doped lithium titanate. The apparatus includes a camera system and an optimization system. The monitoring system includes at least one subsidiary company database for storing material data for the associated subsidiary company; a central database for storing global material data; a material monitoring system server and an application program on the material monitoring system server, which selects, integrates, classifies, and controls display of data.