Instability of lithium bis(fluorosulfonyl)imide (LiFSI)–potassium bis(fluorosulfonyl)imide (KFSI) system with LiCoO2 at high voltage |
Impedance spectra obtained at various cycles for Li/LiFSI–KFSI ( χ LiFSI: χ KFSI = 0.41: 0.59)/LiCoO2 cell at a charge/discharge rate of 0.2/0.2 C at 80 °C. They were measured at the fully charged state. |
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