We are excited to share our latest publication, "Comparing the Electrical Performance of Commercial Sodium-Ion and Lithium-Iron-Phosphate Batteries."
To compete with lithium-iron-phosphate (LFP) cells, sodium-ion batteries (SIBs) must demonstrate comparable performance. In this study, we systematically compare two SIBs (with NiFeMn cathodes) to an LFP battery, evaluating key electrical performance metrics across different temperatures, including pulse resistance, impedance, and rate capability. Additionally, we assess energy efficiency across the full state-of-charge (SOC) range and SOC-dependent efficiency.
Our highlights include:
•    Direct comparison of two SIBs and one LFP battery.
•    Measurements conducted at six temperatures (10 °C – 45 °C).
•    SIBs show higher resistance & impedance dependence on temperature and SOC.
•    Rate capability of SIBs is comparable to LFP.
•    Energy efficiency of SIBs increases significantly with SOC.
Read the full open-access paper here: doi.org/10.1016/j.jpowsour.2025.236290