Synthesis of LiNi0.8Mn0.1Co0.1O2 cathode material by hydrothermal method for high energy density lithium ion battery

Abstract

The synthesis of LiNi0.8Mn0.1Co0.1O2 (LNMC) material had been performed via hydrothermal method. LNMC materials as Li-ion battery cathode is chosen because it has many advantages, such as the availability of abundant materials, low cost, high capacity and superior performance of the battery. In this research, hydrothermal method is chosen because it can increase the size of crystallite with good structure hence the crystal quality is improved which is advantageous to improve battery capacity and cycle performance. The novelty of this study is the use of nickel sulfate, manganese sulfate and cobalt sulfate as the transitional metal source of LNMC. The hydrothermal temperature was varied between 160°C - 190°C. Based on X-ray Diffraction test (XRD), LNMC material has crystallite size in the range 45.37 - 46.74 nm. While based on the chargedischarge test, the resulting LNMC cathode battery has a capacity value in the range 0.0453 - 1.199 mAh/g. The highest capacity was obtained on batteries using LNMC cathode electrodes synthesized at 190° C hydrothermal (LNMC H-190 samples). This could be caused by large crystallite size of the sample. As the size of the crystal increases, the Li+ ion intercalation pathways will be wider hence the storage capacity is also greater.