Synthesis and Characterization of LiNi0.8Co0.15Al0.05O2 Cathode Material Via Co-Precipitation Method With Green Chelating Agents

摘要

Ni-rich cathode material in Li-ion Battery had become popular and widely used as energy storage in mobile devices and electrical vehicles. LiNi_0.8Co_0.15Al_0.05O₂ is a cathode material that has high energy density compared to other. While the co-precipitation route has become a technology of choice in the production of LiNi_0.8Co_0.15Al_0.05O₂ (NCA) due to its ability to form a particle with high homogeneity in atomic level, the utilization of ammonia as chelating agents in co-precipitation of NCA precursor has become a concern due to its volatile, harmful and non-environmental friendly properties. An alternative green chelating agent such as glucose and glycerol has been applied in this study. The obtained hydroxide precursor was sintered under the air stream. The effects of glucose and glycerol during precursor precipitation are investigated. X-Ray diffraction patterns indicate that the material has a layered-hexagonal structure with high degree ordering. The thermal decomposition of a precursor is studied from TG/DTA. The morphology of the material is characterized by SEM (scanning electron microscope) analysis. The electrochemical performance were performed by chargedischarge test between 2.8-4.3 V at 1/20 C. Improving performance and characteristic is exhibited by the material with green chelating agents.