Modeling the Resistance of Thin-Film Current Collectors in Thin-Film Batteries

Thin-film lithium-ion batteries (LIBs) have attracted much attention as one of the state-of-the-art energy storage technologies. However, most research regarded the current collector as infinitely conductive or with no separate simulation for this part. Herein, a model is proposed to simulate thin-film current collectors' potential distribution and resistance. The effects of changing the aspect ratio and the thickness on the thin-film current collector are investigated. The experimental results obtained are in excellent agreement with the model. At the same time, this method is quite generic and can also be used for other types of batteries.