Woven Copper Mesh Chips (D=10-16 mm, Mesh 100-300) as Anode-Free Battery Current Collector, 100 pcs/bag, CAFBCCWCMC

Woven copper mesh chips (precision-cut discs, squares, or custom geometric filters woven from ultra-fine high-purity copper wires) represent a specialized 3D fibrous substrate architecture utilized in anode-free (zero-excess) battery configurations, including advanced aqueous zinc-ion and alkali-metal systems. Unlike flat planar foils or stretched expanded metal sheets, woven copper meshes consist of warp and weft copper wires interlaced at right angles, creating a uniform, highly permeable micro-channel network.

The key structural and electrochemical advantages of woven copper mesh chips in anode-free cells are: (1) Uniform Micro-Porous Interlaced Geometry: The regular crossing points of the warp and weft wires create a highly ordered, periodic array of apertures. This geometry delivers an exceptionally uniform electric field distribution across the substrate surface, eliminating the erratic field gradients often found near random defects or jagged edges. (2) Exceptional Surface Area & Mass Transport: Woven meshes offer a very high open-area ratio (often 30% to 50%+ depending on mesh count, wire diameter, and weave type like plain or twill). This allows unhindered, multi-directional electrolyte flux through the current collector thickness, ensuring that both front and back faces participate evenly in charge transfer. (3) Compliant Structural Elasticity: The interlaced wire architecture imparts micro-spring flexibility, enabling the substrate to elastically flex and accommodate the mechanical breathing and volume changes of direct metal plating and stripping without macro-buckling or delaminating from the electrode stack.

References: 

1. E. Kim, et al. Physically Coated Gold Film on Copper Mesh Electrode for Anode-Free Batteries, ACS Appl. Energy Mater. (2025) 8 (10): 6746–6755.
2. N. Li, et al. Super-three-dimensional lithiophilic Cu-based current collector for anode-free lithium metal battery, 2023, 36, 101341