Battery current collector
Metal free, light weight, porous current collector for batteries with Carbon Nanotubes (CNT)
The cathodes in Li-ion are made of a composite film (including the active material and different additives), and are attached to a current colllector. The latter being an Al foil. Such metallic substrate is prone to corrosion when the batteries operate at high voltages. in addition, the 2D contact of metallic current collector with the active material limits electron collection and thus the electrode thickness that can be achieved without affecting the power performance.
Our new collector is a porous light film with CNTs. Such 3D network present higher corrosion resistance than conventional Al foil and allows for better electron collection, eben with high electrode loading.