How thick is the current collector on a lithium ion battery?

The thickness of the current collector in a lithium-ion battery can vary depending on the specific design of the battery. However, most current collectors used in lithium-ion batteries are very thin, typically only a few micrometers thick.

The current collector is typically a thin metal foil or mesh that is placed on both sides of the electrode layers in the battery. Its main function is to collect the electrons generated by the chemical reactions in the battery and conduct them to the external circuit, where they can be used to power devices.

Because the current collector needs to be thin and flexible in order to be integrated into the battery design, it is usually made of lightweight metals such as aluminum or copper. The exact thickness of the current collector will depend on factors such as the specific application of the battery, the desired energy density, and the overall size and weight of the battery. However, it is typically on the order of a few micrometers or less.