Synthesis of cathodic material of lithium ion battery by NMC composition using the middle nucleation method in co-precipitation process

In this study, the middle nucleation method in co-precipitation process was used to synthesize lithium ion battery cathode precursor with NMC compound. In order to improve the performance of the battery in the lithiation process, the precursor is mixed with larger amounts of lithium to increase the lithium ion penetration coefficient in the cathode structure. In this method, nuclition and spherical growth of carbonate precursor was performed by pH and reaction bed control. The XRD results indicate that the middle nucleation method leads to better crystallization of the precursor. The SEM results also indicate that particle size distribution is more appropriate than conventional co-precipitation process. The results of the battery charging/discharging test made with synthesized cathode have a capacity of 195mAh/g at a discharge rate of 0.5C, It also has better cyclic stability than similar samples (discharge capacity at a discharge rate of 0.5C after 30 cycles of 185 mAh/g). EIS results show that the internal impedance of the battery compared with similar samples has decreased. In total, it can be noted that the use of co-precipitation process by middle nucleation method with excess lithium has been found to be a suitable method for the preparation of a lithium-ion battery cathode.