Sigma-Aldrich Sodium Cobalt Oxide Cathode Active Mat&

Our battery-grade sodium cobalt oxide (Na_0.7COO₂) cathode active material is engineered for high-performance sodium-ion batteries. Sodium cobalt oxide, also known as sodium cobaltate, belongs to a family of layered compounds with the general formula Na_xCOO₆ (0 < x ≤ 1), where layers of sodium cations alternate with two-dimensional sheets of cobalt and oxygen. The structured arrangement of edge-sharing COO₆octahedra creates a robust electronically conductive framework, reminiscent of the layered structure seen in cuprate superconductors, but with a triangular lattice. With a controlled particle size distribution of 2–5 μm (D50) and a surface area of 1–3 M²/g, our Na_0.7COO₂ material is designed to provide consistent and reliable performance in energy-dense applications.

Optimized for advanced sodium-ion battery manufacturing and research, our Na_0.7COO₂ cathode material delivers a balanced combination of high conductivity and stable electrochemical performance. It provides a typical first cycle discharge capacity of 100 mAh/g at C/3 from 4.0 to 2.0 V, with efficiencies exceeding 85%. Notably, the material demonstrates excellent long-term stability, with capacity retention greater than 95% over 60 cycles. The unique layered architecture facilitates efficient ion transport while maintaining structural integrity under repeated cycling, making it a promising and cost-effective alternative for next-generation energy storage systems.