fig4

Figure 4. SOH estimation and prediction at 35 and 45 °C. Estimated (red curve) and measured (blue curve) capacity for the testing cells 35C02 (A) and 45C02 (C). The R² of this model is shown on the left bottom. Prediction of the capacity degradation trajectory (green curve) based on the EIS data from the initial 50 cycles. The blue curves represent the measured capacity for the 35C02 cell (B) and 45C02 cell (D). The capacity is normalized relative to the initial capacity in each case. The shaded area in all plots indicates ±1 standard deviation. SOH: State of health; EIS: electrochemical impedance spectroscopy.