What is the role of copper foil in a Lib?

Within LIBs, copper foil is both the carrier of the negative active material and the electron collector, essential for gathering electrons from the active material and augmenting the output current [5, 6].

What is electrolytic copper foil?

Electrolytic copper foil has gained significant attention as an essential component in lithium-ion batteries (LIBs), printed circuit boards (PCBs), and chip packaging substrates (CPSs) applications.

Why does copper foil detach from a copper current collector?

Moreover, a lower surface roughness of copper foil will also deteriorate the adhesion of the active substance to the copper current collectors [20, 21, 22]. In a long process of charge–discharge cycles, the active substance of the negative electrode may detach from the Cu current collector.

Why is surface modification of copper foil important?

However, electrolytic copper foil is prone to corrosion in electrolytes and weak bonding to the anode substance. Surface modification of copper foil is considered an effective method of improving the overall electrochemical performance of LIBs.

What is the production process of electrolytic copper foils?

The production process of electrolytic copper foils primarily consists of three sequential steps, namely, the dissolution of copper to make an electrolyte solution, the electrodeposition of copper ions to form copper foil, and surface treatment (Fig. 3).

How to improve the mechanical properties of electrolytic copper foils?

As mentioned earlier, the primary research objective for copper foils is to decrease their thickness while retaining outstanding mechanical properties. Introducing reinforcing phases is an effective method to improve the mechanical properties of electrolytic copper foils.