What is copper foil? Copper foil is an important basic material in lithium battery and electronic field. Industrial copper foil can be divided into Calendered copper foil and Electrolytic copper foil Among them, the calendered copper foil has good ductility and is used in the early soft plate process, while the electrolytic copper foil has the advantage of low cost and is the mainstream copper foil product in the current market.

Electrolytic copper foil is mainly divided into Lithium copper foil And standard copper foil. Copper foil can be divided into lithium battery copper foil and standard copper foil according to the use. It can be divided into very thin copper foil (≤ 6 μ m) Ultra thin copper foil (≤ 12 μ m) , thin copper foil (12-18 μ m) Common copper foil (18-90 μ m) , thick copper foil (>70 μ m)。 The thickness of lithium battery copper foil is generally 6-20 μ m. Lithium batteries for power, consumption, energy storage and other fields. Standard copper foil is mainly used in electronic information industry, such as lower power printed circuit board (PCB). According to the data of China Electronics Copper Foil Information Network, the sales of domestic lithium battery copper foil and standard copper foil in 2019 were 31.3% and 68.7% respectively.