Fig. 5: Voltage profiles and internal resistance in cells cycled at elevated temperature.

Voltage profiles as well as internal cell resistance measured with the ICI method for Prussian white—Hard carbon full-cells with four different electrolytes (0.35 M NaBOB–TEP (orange), 0.35 M NaBOB–TEP + 3 wt% PES (blue), 0.35 M NaBOB–TEP + 3 wt% DTD (green) and 1 M NaPF6 in EC:DEC (black)), cycled at 0.2 C at a 40 °C and b 55 °C temperatures.