Lithium-sulfur battery cathode using fabric material, lithium-sulfur battery containing the same, and manufacturing method thereof

Fabric-based Lithium-Sulfur Cathode via Electroplating and Layer-by-Layer Self-Assembly Coating

This technology secures electrical conductivity and specific surface area by electroplating metal onto a carbonized fabric support. It further enhances electrochemical stability and suppresses the sulfur shuttle effect by applying a conductive capping layer through the layer-by-layer (LbL) self-assembly of sulfur polymers and functionalized carbon nanotubes (amine/carboxyl groups).

Conventional carbon-based supports suffer from insufficient conductivity and mechanical stability, while electroless plating often leads to impurities and uneven coating. Furthermore, increasing sulfur loading in lithium-sulfur battery cathodes has historically been limited by low electrical conductivity, volume expansion, and reduced operational stability due to the shuttle effect.

This technology provides a practical solution for developing next-generation lithium secondary battery cathode materials by heat-treating fabric at 600–2000°C to create a carbon support with a maintained network structure, followed by uniform electroplating of metals such as Ni, Cu, or Al.

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Key Features:

• Manufacturing a conductive support by carbonizing fabric material through heat treatment to form a cathode.
• Uniformly electroplating conductive metal materials onto the surface of the manufactured conductive support.
• Coating the electroplated support with a hybrid slurry containing sulfur polymers and a first carbon material modified with a first functional group.
• A configuration featuring metal electroplating on a carbonized fabric support, combined with layer-by-layer self-assembly coating of sulfur polymers and functionalized carbon nanotubes.

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