Lepu Sodium-Ion Battery Unveils New Patent, Unlocking New Heights in Sodium-Ion Cathode Performance

Recently, Lopu Sodium Battery has achieved another significant breakthrough in the field of key materials for sodium-ion batteries—the company has officially obtained an invention patent for "A Preparation Method of Doped Modified Sodium Iron Pyrophosphate Cathode Material," marking a new milestone in the innovation and engineering capabilities of its cathode material system.

Driven by the "dual carbon" goals, sodium-ion batteries, with advantages such as abundant resources, controllable costs, and high safety, are becoming an important development direction for new energy storage and power batteries. However, due to factors such as the larger radius of sodium ions and slower diffusion kinetics, traditional cathode materials still face significant bottlenecks in cycle life, rate performance, and energy density. Addressing these industry pain points, Lopu Sodium Battery's latest patent proposes a systematic solution combining "structural design and process optimization" based on the sodium iron pyrophosphate (Na₂FeP₂O₇) system. On one hand, by introducing tetravalent and trivalent heterovalent metal ions for synergistic doping at the Fe site, lattice distortion and structural contraction are induced, significantly enhancing the material's intrinsic electronic conductivity and sodium ion diffusion capability without altering the crystal structure. On the other hand, by precisely controlling the Na/Fe non-stoichiometric ratio and innovatively introducing a sodium supplement agent, a stable surface protection structure is formed during the sintering process, along with a microporous structure conducive to electrolyte infiltration, effectively inhibiting sodium dendrite formation and reducing charge transfer impedance. Under the synergistic effect of multiple mechanisms, the material's performance has achieved a significant leap: the initial discharge specific capacity reaches up to 121.1 mAh/g, the initial Coulombic efficiency reaches 96.51%, and it demonstrates excellent cycle stability and rate performance, fully verifying the advanced nature and feasibility of this technical path. More critically, this technology adopts a simplified ball milling process system, requiring no complex equipment or high-pressure conditions, offering significant advantages of "simple process, controllable cost, and environmental friendliness," laying a solid foundation for large-scale industrial application. The acquisition of this patent not only further enriches Lopu Sodium Battery's core technology layout in the cathode material field but also provides important support for the company to build an integrated "material-cell-system" capability. In the future, Lopu Sodium Battery will continue to focus on high-performance sodium battery materials and key technology breakthroughs, accelerate the transformation of technological achievements, and promote the application of sodium-ion batteries in multiple scenarios such as energy storage and electrification. Driven by innovation and guided by technology, Lopu Sodium Battery is providing a more competitive Chinese solution for the global energy transition.