The invention relates to a cathode component, which comprises at least an electrochemical active metal, at least an alkali halide, at least an electrolyte, and an electrochemical inactive metal oxide; wherein the electrochemical inactive metal oxide does not contain cations which are subjected to ion exchange during an electrochemical process, and the average particle size is between 0.01 micrometers and 100 micrometers. The invention also relates to an energy storing device of the cathode component and a method for producing the energy storing device.