High Performance Battery Materials

Cathodes, Anodes, and Electrolytes

Cathode Materials for Sodium-ion Batteries

Just as is the case with lithium-ion batteries, cathode materials are a key component of Sodium-ion batteries. The composition of the cathode material determines the cell voltage and capacity, and thereby the energy density. Sodium-ion cathode materials are typically based on intercalation / de-intercalation compounds, where sodium ions provided by the cathode are inserted into the host lattice (anode) during charge and extracted during discharge, with minimal structural change in the host material.

In contrast to lithium, sodium is one of the most abundant elements in the earth’s crust. Consequently, Na-ion batteries have attracted much attention over the past few years. The choice of cathode material with a particular chemistry depends on various factors, including cell voltage, capacity, energy and power capabilities, cycle life, and temperature of operation.

Custom Compositions

NEI can provide a variety of custom synthesized Na-ion cathode materials upon request (some examples are shown below):

Cathode Material TypeCompositionNominal Voltage vs. NaAdvantagesApplications Nominal Capacity at 0.1C
Na-Transition Metal
Na3MnPO4CO3~3.3 VHigh energyPortable electronics and electric vehicles191 mAh/g (theoretical)
Simple Layered
(M= Co, Fe, Mn, Ni)
~3.2VComparable power to that of LiCoO2Power tools~110 mAh/g
Na-Transition Metal
(Olivine Type) Phosphates
(M=Fe, Mn, Co, Ni)
~3.0VHigh energy~120 mAh/g
Na-Transition Metal
Fluro Phosphates
Na2FePO4F~2.97VComparable power to that of LiCoO2Portable electronics~110 mAh/g

Technical Information

Battery Specification Sheets

Safety Data Sheets (SDS)

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