Solid-State Synthesis and Characterization of LiNi_0.75Co_0.20Al_0.05O₂ Cathodes for Lithium-Ion Battery Applications

Abstract:

The increasing demand for electric vehicles and alternative energy sources results in high demand for energy storage, such as high-capacity rechargeable batteries. Ni-based ternary cathodes like lithium nickel cobalt aluminum oxide (NCA) have become promising due to their high energy density. In this study, a facile solid-state reaction pathway for the synthesis of LiNi_0.75Co_0.20Al_0.05O₂ cathode using metal oxide precursors was investigated. Thermal analysis using TGA-DTA showed the decomposition and mass loss of the calcined precursors and revealed an endothermic reaction at about 700°C, which can be attributed to Li₂CO₃ melting. XRD analysis reveals the creation of hexagonal NCA with an α-NaFeO2 r3m structure along a secondary LCO phase. However, resintering leads to a more thorough reaction, yielding hexagonal NCA with lattice parameters a = 2.863 Å and c = 14.192 Å. In addition, SEM-EDX analysis reveals irregularly shaped agglomerated morphology and relatively homogenous distribution of Ni, Co, and Al for the resintered samples.

• Periodical: Defect and Diffusion Forum (Volume 433)
• Pages: 63-68
• DOI: https://doi.org/10.4028/p-Sj4W7Y
• Online since: June 2024
• Authors: Joshua Brian Agoncillo, Mark Verndick Cabading, Rinlee Butch M. Cervera*
• Keywords: Lithium-Ion Batteries, NCA, Ni-Based Cathode, Solid-State Synthesis, Ternary Cathode

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