2) Two processes likely occur simultaneously in the long plateau at ~ 1.2-1.3 V , which are the fluorination of the carbon black additive in addition to the formation of a high fluorine content RP-type phase with a lattice parameter c around 15.275(3) Å, which has also been found for related materials and is indicated by an additional reflection at 29° within the X-ray diffractograms (Figure ). As the charging process within this plateau proceeds, the reflection at 29° increases in intensity along with the decrease in the intensity of the indicative reflections of the parent(-related) compound La2Ni0.75Co0.25O4.08 at ~31.5° and ~32.5° respectively. At the end of this plateau, a full transformation of the RP-type phase to the phase with large lattice parameter c can be observed, and the reflections belonging to this phase become sharper again, indicating that defect-related strain broadening is reduced from the increased fluorination.