This technology is an anode active material that forms a solid solution by substituting doping metals such as Cr, Mo, and W into the vanadium lattice sites of lithium vanadium oxide (Li3VO4). This reduces lithium-ion diffusion resistance within the crystal structure and improves the structural and volumetric instability that occurs during charging and discharging.
Conventional lithium vanadium oxide faces issues where repeated charging and discharging lead to crystal structure and volume changes due to lithium insertion and extraction, resulting in active material loss and decreased charging capacity. Furthermore, traditional solid-state synthesis methods make it difficult to uniformly control particle size and synthesize fine powders in large quantities.
This technology utilizes a solution precipitation method to synthesize a monoclinic (Pmn21 space group) single-phase solid solution with a composition of Li3V1-xMxO4 (0 < x ≤ 0.07), where M represents the doping metals (Cr, Mo, W). This ensures structural stability while enabling the mass production of fine, uniform particles. Applicable to high-power lithium-ion battery anodes and energy storage system cells, it suppresses capacity degradation over long-term cycles while reducing the cost burden of mass-producing the powder.
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