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.

数据集1-1与1-2中的电芯均为NFM钠离子电池，额定容量为4.5 Ah，分别在25℃与-15℃下开展测试，测试电压窗口为2.0–4.0 V。数据集2中的电芯为NCM锂离子电池，额定容量为1.5 Ah，在25℃下以2.5–4.2 V的电压窗口进行测试。本研究采用Land CT2001与Neware CT-4008型多通道电池测试仪，对所有电芯的循环性能进行监测。每个循环的充电与放电工序均以1 C的恒定电流倍率完成。从恒流充放电阶段提取的电池循环曲线被整合至对应数据集之中。