The coating thicknesses are functionally specific, and for the best improvement of a cathode, a particular coating thickness should be sought. We have applied the XRD-CT technique to investigate NMC electrodes cycled at different voltages using a 1 m X-ray beam. The results of this study indicate that an optimized coating thickness is needed in order to strike a balance between maintaining structural stability while minimizing electrochemical impedance. There is an increasing interest on dopants such as Mo or Ta as a promising dopants for high-Ni materials. Consequently, a thicker ALD coating resulted in increased electrochemical impedance of the cathode. Ni-rich, cathode active materials such as LiNi 0.8 Mn 0.1 Co 0.1O 2 (NMC811) suffer from capacity fade, especially at higher upper cut-off voltages. the different high voltage degradation mechanisms of LCO and NMC. Our investigation revealed that a thicker coating proved to be beneficial in preventing cathode material dissolution into the electrolyte and aided in maintaining the microstructure of NMC. Effect of Anode Slippage on Cathode Cutoff Potential and Degradation Mechanisms in. Our results indicate that utilization of a solid-state electrolyte as a coating material for NMC significantly improves performance at high cutoff voltages but is strongly dependent on coating thicknesses. In this study, for the first time, we employ atomic layer deposition (ALD) to coat lithium tantalum oxide, a solid-state electrolyte, with varying thicknesses on NMC in an attempt to improve battery performance. LiNi 1/3Co 1/3Mn 1/3O 2 (NMC) is a highly promising cathode material for use in lithium ion batteries unfortunately, its poor cycling performance at high cutoff voltages hinders its commercialization.
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