Lithium-Metal-on-Copper Current Collector Foil for Lithium Solid-State Batteries (Li 0.021 mm / Cu 0.010 mm)

Cat No:BMSPEM-0585

Description

This lithium-metal-on-copper composite foil from Eata Battery is a pre-laminated anode material for lithium solid-state and lithium-metal batteries, replacing manual stacking of separate lithium and copper foils. Single-sided version: lithium foil 0.021 mm on 0.010 mm copper foil, total thickness 0.031 mm, lithium width 80.09 mm, copper width 100.00 mm, with 10.0 +/- 1.0 mm bare copper margins on both sides for ultrasonic tab welding. Double-sided version: 0.021-0.022 mm lithium on each side of 0.010 mm copper, total thickness 0.053-0.054 mm, lithium width 80.11 mm per side, same 100.00 mm copper width and margins. Lithium content is 99.9 wt% minimum with impurities of Na <= 0.02 %, K <= 0.005 %, Ca <= 0.02 %, Fe <= 0.005 %, N <= 0.02 %, Si <= 0.008 %, Cl <= 0.006 %, Al <= 0.005 %, Ni <= 0.003 %, Cu <= 0.004 % and Mg <= 0.01 %. Compared with hand-assembled separate foils, the controlled lamination process holds lithium thickness uniformity to +/- 1 um across the roll, forms a direct composite weld with interface resistance below 0.1 ohm-cm2, protects the lithium from oxide formation by production and packing under dry argon in pre-dried pouches, and lets a 10-layer cell stack be cut, stacked and welded in under 15 minutes.