Expanded Aluminum Mesh Roll (T 0.05-0.1mm * W 200mm * L 2m) with Rhombic Pores as Battery Cathode Current Collector, CBCCCEAMR

The expanded aluminum mesh current collector with rhombic pores is a 3D structural substrate used primarily in high-power lithium-ion batteries and next-generation lithium-metal anodes. Unlike the "microporous" foil which is a solid sheet with holes drilled into it, the mesh is created by stretching and expanding a copper sheet to form a series of diamond-shaped (rhombic) or round openings.

The mesh design provides a "bridge-and-void" architecture that offers specific advantages over both solid and standard perforated foils:

(1) 3D Skeleton: The rhombic and round pattern creates a three-dimensional framework that allows the active anode material (like graphite or silicon) to be embedded inside the mesh rather than just coated on top.

(2) High Opening Ratio: These meshes typically have a high "open area" (often 40%–70%), which drastically reduces the amount of inactive metal in the battery.

(3) Interlocking Diamonds: The geometry of the rhombic or round openings provides superior mechanical interlocking, which is critical for preventing the electrode material from falling off during high-vibration use or rapid expansion.

Therefore, it brings the following advantages: (1) Volume expansion accommodation; (2) Enhanced ion pathways; (3) Heat dissipation; (4) Dendrite suppression. 

References:

1. D. Karimi, et al., Thermal performance enhancement of phase change material using aluminum-mesh grid foil for lithium-capacitor modules, J. Energy Storage, 2020, 30, 101508. 
2. Y. Yue, et al., 3D Current Collectors for Lithium-Ion Batteries: A Topical Review, Small Methods, 2018, 2, 1800056.