Abstract: The present invention provides a positive electrode current collector, and a preparation method and use thereof. The positive electrode current collector is of a multilayered structure and comprises a plastic thin film, wherein the upper and lower surfaces of the plastic thin film are coated with a bonding force enhancement layer, an aluminum metal coating layer and an anti-oxidization layer in sequence. The preparation method comprises the steps of coating the bonding force enhancement layer, the aluminum metal coating layer and the anti-oxidization layer in sequence through an evaporation film-coating process. Use of the positive electrode current collector in a lithium ion battery is further provided. By virtue of the positive electrode current collector according to the present invention, light weight and improved energy density of the battery is realized, and the aluminum coating layer is not easily peeled off, and insusceptible to oxidization.

Abstract: A double-sided vacuum coating device for continuously coating a film back and forth is provided, including a vacuum chamber provided with an upper winding and unwinding mechanism, an upper delivery mechanism, a lower delivery mechanism and a lower winding and unwinding mechanism therein, wherein the vacuum coating device is configured that a film to be coated can start from the upper winding and unwinding mechanism and pass through the upper delivery mechanism and the lower delivery mechanism to the lower winding and unwinding mechanism, or start from the lower winding and unwinding mechanism and pass through the lower delivery mechanism and the upper delivery mechanism to the upper winding and unwinding mechanism, and wherein each of the upper delivery mechanism and the lower delivery mechanism is provided with a coating assembly at a position corresponding to the film.

Abstract: The present invention provides a positive electrode current collector, and a preparation method and use thereof. The positive electrode current collector is of a multilayered structure and comprises a plastic thin film, wherein the upper and lower surfaces of the plastic thin film are coated with a bonding force enhancement layer, an aluminum metal coating layer and an anti-oxidization layer in sequence. The preparation method comprises the steps of coating the bonding force enhancement layer, the aluminum metal coating layer and the anti-oxidization layer in sequence through an evaporation film-coating process. Use of the positive electrode current collector in a lithium ion battery is further provided. By virtue of the positive electrode current collector according to the present invention, light weight and improved energy density of the battery is realized, and the aluminum coating layer is not easily peeled off, and insusceptible to oxidization.