Long-cycle-life lithium ion battery and preparation method thereof

The invention relates to the technical field of lithium batteries, in particular to a long-cycle-life lithium ion battery and a preparation method thereof. The long-cycle-life lithium ion battery comprises a current collector, a positive electrode material system and a negative electrode material system, wherein the current collector is provided with a plurality of current collector micropores, the positive electrode material system and the negative electrode material system respectively comprise an additive, and the additive is a carbon material with a high specific surface area or a microporous structure. Compared with the prior art, the long-cycle-life lithium ion battery has the following effects that the design is reasonable, the absorption speed and the storage capacity of an electrolytic solution can be improved by arranging the microporous structure on the current collector so as to facilitate transmission of lithium ions on the two sides of the electrode plate, solve the problem of electrical propert