Ultra-thick Dry-process Cathode Design through Formula Optimization

Abstract Lithium-ion batteries is an indispensable energy storage device in wind energy and solar energy grid-connected system. Solvent-free electrodes manufacturing processes as a new technology have attracted increasing scientific interest due to their cost reduction, ecological friendliness, and ability to increase electrode density. The coordination between the various components plays a crucial and pivotal role in shaping the physical and electrochemical performance of the electrode. In this research, through rational formulation optimization, it is possible to determine the optimal manufacturing parameters for improving performance, such as cycle stability and energy density. Improving battery performance can accelerate the spread of various applications, including electric vehicles and grid-scale energy storage. Studies have shown that when the conductive agent/binder is 5:2, the cycle stability and specific capacity of the battery is the best, under the condition of 0.5 C, even at a high load of 55.4 mg/cm 2 , it can still play 153.5 mAh /g specific capacity, and the capacity retention rate after 100 cycles is 82.0%. This will make the application of lithium batteries in wind and solar grid-connected systems more extensive and efficient.