Carbon Nanotube-Coated Anode Current Collector for Anode-Free Aqueous Zinc Batteries and Anode-Free Aqueous Zinc Battery Comprising the Same

Zinc Battery Anode Current Collector with Dendrite Suppression via Polymer-Free Single-Walled CNT Coating

This technology forms a polymer-free single-walled carbon nanotube (SWCNT) network coating on the surface of a copper current collector to suppress zinc dendrite growth and induce uniform zinc deposition between the current collector and the coating layer.

In anode-free aqueous zinc batteries, non-uniform dendrite growth during zinc deposition leads to battery short circuits, while existing solutions using additives or 3D porous current collectors suffer from low cost-efficiency and complex manufacturing processes.

By applying a 0.1–3㎛ thick coating layer composed of over 90 wt% SWCNT without polymer binders onto a copper current collector via a doctor blading process, this technology creates a 3D network structure with excellent electrical conductivity and mechanical strength, offering a practical solution for developing next-generation secondary battery anode materials.

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Key Features:

• Anode current collector for anode-free aqueous batteries containing copper and no anode active material
• Coating layer formed on the surface of the anode current collector, comprising polymer-free single-walled carbon nanotubes
• Configuration that suppresses zinc dendrite growth through a single-walled carbon nanotube network coating layer
• Anode current collector applied to anode-free aqueous zinc batteries by securing interfacial adhesion between the current collector and the coating layer

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