Battery Degradation Datasets (NFM Sodium-ion Batteries and NCM Lithium-ion Batteries)

Cells from Datasets 1-1 and 1-2 are NFM sodium-ion batteries with a nominal capacity of 4.5 Ah, tested at 25 and -15 ℃, respectively, within a voltage window of 2.0–4.0 V. Cells from Dataset 2 are NCM lithium-ion batteries with a nominal capacity of 1.5 Ah, tested at 25 °C within a voltage window of 2.5–4.2 V. Land CT2001 and Neware CT-4008 multichannel battery testers were employed to monitor the cycling performance of all cells. In each cycle, both the charging and discharging processes were conducted at a constant-current rate of 1 C. The battery cycling curves extracted from the constant-current charging and discharging stage were incorporated into the corresponding datasets.