Sodium copper iron manganese oxide

Sodium copper iron manganese oxide (NCFMO), with the composition Na_₀.₉₀Cu_₀.₂₂Fe_₀.₃₀Mn_₀.₄₈O_₂, is a high-performance cathode active material developed for sodium-ion battery applications (SIBs). As an advancement of the sodium iron manganese oxide (NFM) family, NCFMO is engineered through copper doping to crystallize in the O₃-type layered structure. In this configuration, sodium ions occupy octahedral sites between layers of transition metal oxides, facilitating efficient sodium-ion transport with minimal volume change during charge-discharge cycles—crucial for long-lasting electrochemical performance. The incorporation of copper enhances the discharge capacity and elevates the nominal voltage compared to undoped NFM, improving the material′s electrochemical properties. Our NCFMO typically exhibits a reversible capacity exceeding 100 mAh/g when cycling between 2.0 V and 4.0 V, with a nominal operating voltage around 3.3 V vs. Na⁺/Na. To boost electronic conductivity and rate performance, our NCFMO features a 3 wt% carbon coating. Supplied as a fine powder with a typical particle size of 17–22 μm (D50) and a surface area of 1–2 m^²/g, the material has a bulk density of 1.2 g/cm^³. Please note that NCFMO is not air-stable and should be stored and handled under inert conditions to maintain its integrity and performance.

Sodium Copper Iron Manganese Oxide (NCFMO) is an innovative cathode material designed for advanced sodium-ion batteries, offering a sustainable and cost-effective alternative to lithium-ion systems. Engineered with an O3-type layered structure, NCFMO enables efficient sodium-ion transport, resulting in high specific capacities and excellent cycling stability. Operating within a voltage range of 2.0 V to 4.0 V and delivering a first cycle discharge capacity exceeding 100 mAh/g at 0.1C, it is ideally suited for high-energy-demand applications such as grid energy storage, electric vehicles, and portable electronics. The strategic incorporation of copper enhances discharge capacity and elevates the nominal operating voltage to approximately 3.3 V vs. Na⁺/Na, boosting overall battery performance. NCFMO′s robust structural integrity minimizes volumetric changes during cycling, reducing degradation and extending battery life. The addition of a 3 wt% carbon coating improves electronic conductivity and rate performance, making it suitable for rapid charge and discharge applications. These attributes position NCFMO as a promising candidate for next-generation sodium-ion batteries, meeting the growing demand for efficient, reliable, and environmentally friendly energy storage solutions.

Cu-doping: boosts energy density and improves cyclability
3 wt.% carbon coating: enhances rate performance