Investigation on the Impact of Coating Thickness Setting and Calendering on the NMC 811 Cathode Performances for Lithium-Ion Batteries

Abstract

The need for energy in various activities around the world is increasing. Batteries come as an important energy solution, among others, for various applications, such as electric vehicles, mass storage for utilities, gadgets, etc. Lithium-ion batteries that are able to produce superior performance are needed. The battery cathode is an important key to the performance of lithium-ion batteries. The battery cathode fabrication factor is one that affects the quality of the battery produced. The thickness of the coating material will determine the amount of active material contained in the cathode, while the calendering process is needed to compress the material in the cathode so that the lithium-ion transfer process in the battery can run more effectively. Based on the research results, the thicker the coating material on the cathode, the greater the capacity value produced. With a coating thickness of 300 µm, the resulting capacity reaches 180 mAh/gr. However, in the life cycle and rate capability tests, the performance stability is not better than the thickness of 100 µm and 200 µm. As for the calendering level, the battery with an optimum decrease in dry thickness is able to have the best performance in terms of capacity, life cycle, and rate capability.