Functionalized carbon structure, anode electrode using the same, and manufacturing method thereof

Anode structure using diamond-derived porous carbon with oxygen functional groups

This technology is an anode material that maximizes contact area with reactants and improves lithium-ion intercalation/deintercalation performance by introducing heteroatom (oxygen) functional groups into highly crystalline porous secondary carbon particles obtained through freeze-drying and carbonizing diamond particles.

During the charge/discharge process of lithium secondary batteries, non-uniform nucleation and growth of lithium metal lead to dendrite formation, which causes side reactions of electrolyte decomposition and reduces battery lifespan and stability.

This technology involves freeze-drying a solution containing dispersed diamond particles to form aggregates, performing primary heat treatment (in a non-oxygen atmosphere) to produce porous secondary carbon particles with an sp2 graphite structure, and then performing secondary heat treatment (in an oxygen atmosphere) to functionalize the surface with oxygen groups. This contributes to process simplification and cost reduction when applied to secondary battery anode materials.

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Key Features:

• Preparing a source solution with dispersed diamond particles and freeze-drying it to form aggregates
• Carbonizing the formed aggregates to produce secondary carbon particles composed of multiple aggregated primary carbon particles
• Introducing oxygen-containing heteroatom functional groups into the produced secondary carbon particles
• A configuration that improves contact area and lithium intercalation/deintercalation by introducing functional groups to diamond-derived highly crystalline porous carbon

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