Manuscript "Towards carbon-free cathodes for fluoride ion batteries: deconvoluting effects of active material and conductive additive on charging and cyclic stability" Page 15 of 18 Manuscript "Towards carbon-free cathodes for fluoride ion batteries: deconvoluting effects of active material and conductive additive on charging and cyclic stability" Page 16 of 18 Some small differences in the charging behavior and the resulting energy efficiencies are visible between the different cells. While for La2NiO4, Super P was able provide lower overpotentials and therefore higher energy efficiency, the opposite is the case for La2CoO4, where the FATO-based composite resulted in better energy efficiency. This demonstrates that even though Super P did not inhibit good cyclic stability, carbon fluorination did most likely take place and thereby affect the overpotential. The extend of carbon fluorination also seems to be different for La2NiO4 and La2CoO4, where La2NiO4 shows to have better compatibility with carbon additives, similar to what was shown before by Nowroozi et al. for cycling with limited cut-off capacities at ambient pressure .