Method for manufacturing lithium-vanadium oxide with honeycomb-structured particles and lithium-vanadium oxide manufactured thereby

Honeycomb-structured Li3VO4 anode material combining polystyrene template precipitation and residual carbon distribution

This technology synthesizes honeycomb or hollow-structured Li3VO4 particles using a solution precipitation method with a polystyrene template. During heat treatment to remove the template, a trace amount of carbon is uniformly left on the particle surface to improve electrical conductivity.

Conventional lithium vanadium oxide is in bulk form, resulting in a small specific surface area that limits electrode reaction rates. Additionally, its low electrical conductivity makes it difficult to meet the performance requirements for high-power, high-capacity batteries.

This technology uses surfactant-free emulsion-polymerized polystyrene beads as a template to coat and precipitate Li3VO4. Heat treatment at 350–450°C burns off the template to create honeycomb and hollow structures while distributing 0.5–1.0 wt% of residual carbon on the surface. It can be applied to anodes for hybrid vehicle cells requiring rapid charging or high-power energy storage devices, securing a large reaction area and conductive pathways simultaneously without a separate carbon coating process.

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Key Features:

• Step 1: Preparing polystyrene synthesized without surfactants to serve as a template for forming the honeycomb structure.
• Step 2: Adding lithium hydroxide and water to the polystyrene-containing aqueous solution, then adding an aqueous vanadium oxide solution to obtain powder through a precipitation reaction.
• Step 3: Washing and drying the powder obtained from the precipitation reaction to induce particle growth of the lithium vanadium oxide.
• Step 4: Heat-treating the powder at 350 to 450°C to remove the polystyrene while simultaneously distributing residual carbon uniformly on the particle surface.

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