The Front Cover shows electrolyte characterizations after varying FEC and EC content in the electrolyte, including the replacement of EC by FEC, as well as the influence of different upper cut-off voltages (4.5 and 4.2 V). Depending on the composition and concentration of the additive, different degradations and cycling performance were observed. More information can be found in the Research Article by S. Nowak and co-workers (DOI: 10.1002/batt.202500610).
Fehlings et al. (Sun,) studied this question.