“…In electrolytes containing KFSI, a stable, protective, and KF-rich SEI layer is formed on MoS 2 , while in electrolytes containing KPF 6 , an unstable, KFpoor, and organic-rich SEI layer is formed. Ahuja et al 634 compared the performance of Bi 2 Sn 2 O 7 in KFSI-based electrolytes and KPF 6 -based electrolytes and found that the capacity decay was severe in the latter. Huang et al 654 studied the potassium storage performance of the SnO 2 @C composite in 0.8 M KPF 6 in EC/DEC and 3 M KFSI in DME.…”