Serving as the bridge between external electronics and internal lithium-ion transports, current collectors account for over 90% of the electric conductivity and ～90% of the mechanical strength of the electrode in lithium-ion batteries (LiB). Selecting the right anode and cathode battery foil materials is critical to battery developers seeking to maximize the performance of their cells.

Requirements

1. Aluminum foil surface color uniform, clean, flat plate shape, no obvious roll marks, pitting, pinhole, corrosion marks.

2. Aluminum foil surface without creases, speckles, bright lines and other rolling defects.

3. Foil surface without color difference.

4. Surface without oil, no serious smell of oil, no visible oil spots.

5. Surface tension, Dain pen test is not less than 32 dynes.