High Performance Battery Materials

Cathodes, Anodes, and Electrolytes

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.

Available Compositions

NEI can provide a variety of custom synthesized Na-ion materials upon request, such as the materials shown below.

MaterialCompositionType
Sodium Cobalt OxideNa0.7CoO2+xCathode
Sodium Manganese Oxide Na0.7MnO2+xCathode
Sodium Iron Phosphate NaFePO4Cathode
Sodium Manganese Phosphate NaMnPO4Cathode
Sodium Titanium Oxide (monoclinic phase)Na2Ti3O7Anode
Sodium Titanium Oxide (hexagonal or monoclinic phase)Na4Ti5O12Anode
Sodium Aluminum Titanium Phosphate (“NATP”)Na1.3Al0.3Ti1.7P3O12Solid Electrolyte