Composite copper foil features a novel "copper-polyer-copper" structure as a lithium-ion battery anode current collector material. Thinness and cost issues are resolved through vacuum deposition and electroplating. Lightweighting was accomplished by plating copper metal on both sides of a polymer base film.

Features of Lithium Battery Composite Copper Foil

The lithium battery composite copper foil has unprecedented improvements for safety, cost, and energy density. These enhance the unique properties of composite foil and are transformational for lithium-ion battery anode materials. The non-fracture properties of incorporated polymer layers minimise the chances of internal short circuits. Lightweight and uniform surface characteristics, coupled with a high specific capacity design, improve battery energy density. The composite copper foil also incorporates a medium-polymer layer, which enhances the design to be lightweight for the severe copper-reducing layer. This maximises copper economy and cost, and provides the composite foil with reduced copper usage and metal layer optimisations.