How many steps are required to produce a copper foil? In the dust-free constant temperature workshop, dozens of automated machines operate in an orderly manner. After a series of processes such as copper dissolution, liquid making, foil production, baking, and cutting, the copper foil produced is packaged and sent to domestic new energy enterprises.

The most critical step in all processes is the foil production process. As the charged roller rotates continuously, the copper ions in the blue copper sulfate solution are stripped off, turning into a thin copper foil like a cicada's wing.

This copper foil can achieve a tensile strength of 700 megapascals, which is more than twice that of ordinary copper foil; the thinnest is 3.5 microns, equivalent to 1/20 of a human hair, while also possessing excellent toughness.

How is such a thin and strong copper foil refined? This brings us to the core of our technology - the configuration of additives. In the process of converting copper ions into elemental copper, we added a small amount of small and large molecule additives to the electrolyte, thereby improving the mechanical properties of the copper foil.

Copper foil is a key auxiliary material for lithium-ion batteries, and achieving lightweight and mass production of copper foil is the mainstream trend in the new energy battery market in the near future. Currently, the widely used copper foil in the market is 6 microns.

When the energy stored in copper foil remains unchanged, its weight and volume decrease, which means that the overall volume and weight of the new energy battery will decrease. The battery volume will continue to expand and contract with changes in charge and discharge status, and stronger copper foil means longer battery life, endurance, and durability.