Further, the cells were only able to support this capacity for a few cycles, before starting to fade. Apart from carbon-based side reactions, an additional origin for the capacity decay is the volume change of the active materials upon fluorination and defluorination. Even though these materials display an intercalation mechanism upon fluorination, the volume change of ~15 % upon fluorination (see Table ) is not negligible as even much smaller volume changes have been reported to lead to contact loss-induced capacity fading .