Fabrication and Investigation of Nickel-rich (Lithium Nickel Manganese Cobalt Oxide) Electrode Materials

Abstract

Scientists and researchers are concentrating on cathode materials with enhanced nickel content in layered oxides for lithium-ion batteries due to their increased energy density and capacity. Consequently, this study successfully generated the cathode material LiNi0.8Mn0.1Co0.1O2 (NMC811). However, these nickel-rich cathode materials continue to face commercialization challenges including structural instability, structural deterioration, microcracks, increased reactivity with electrolytes, as well as worries about electrochemical and thermal stability. We have successfully produced lithium nickel manganese cobalt dioxide (NMC811) in our continuing study using a two-step process that includes co-precipitation and solid-state synthesis methods. Subsequent to fabricating the NMC811 cathode, we employed the molten salt etching technique to generate MXene (Ti3C2Tx), which was applied as a coating on NMC811 to enhance its conductivity. (Its reduced reactivity on the lower surface enhances cycling durability, mitigates crack formation following repeated cycles, and promotes the growth of lithium dendrites). Properties of MXene coated (NMC811) characterized by XRD, SEM, EDX, CV and EIS. The structure, geometry of samples and crystallinity were confirmed by X-ray diffraction. The morphology, shape and size of nanoparticles are revealed by scanning electron microscopy. Analysis of the elemental composition of nanoparticles were investigated by EDX. The CV curve exhibit redox behaviour of cathode material (NMC811) and composite of CV curves has shown that conductivity has been increased due to the coating of MXene. EIS plots indicate that due to coating of MXene on active electrode material (NMC811), decrease its impedance between electrode/electrolyte interface layer, and enhance Li+ ion transportation between electrodes.