Cathode material containing 2-hydroxy-1,4-naphthoquinone natural dye and eco-friendly lithium battery using the same

Eco-friendly organic cathode material utilizing planar crystals of naphthoquinone natural dye

This technology is an organic cathode material that maximizes electrical conductivity and lithium-ion diffusion performance by utilizing the two-dimensional planar crystal structure and intermolecular hydrogen bonding of 2-hydroxy-1,4-naphthoquinone (Lawsone), a plant-derived natural compound.

Existing organic cathode materials (such as quinone-based ones) have faced issues with failing to reach theoretical capacity and limitations in charge/discharge rates due to low electrical and ionic conductivity.

This technology crystallizes Lawsone molecules extracted from natural henna leaves into a two-dimensional planar arrangement to maximize p-orbital overlap. By loading this onto a gas diffusion layer (GDL) at a level of 2.0-3.0 mg/cm², it improves charge transfer and lithium-ion diffusion efficiency, serving as a foundation for enhancing the maturity of lithium secondary battery cathode material technology.

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Key Features:

• A lithium secondary battery comprising a lithium-based anode and a cathode containing 2-hydroxy-1,4-naphthoquinone crystals as an active material that binds with lithium ions
• An organic cathode material utilizing the two-dimensional planar crystal structure of 2-hydroxy-1,4-naphthoquinone, a plant-derived natural compound
• An active material that improves electrical conductivity and lithium-ion diffusion performance using intermolecular hydrogen bonding
• A configuration that implements an eco-friendly organic cathode by using natural dye crystals as an active material that binds with lithium ions

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