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Abstract
The Ni-rich layered oxide cathode conceptus has shown high energy density, proper rate capability, and longevity of the rechargeable battery, while poor stability and capacity fading are assumed as its common cons. To address this obstacle, the prospective cathode materials are synthesized by integrating the lithium transition metal oxides with an artificial cathode electrolyte interphase (CEI) layer. Herein, plasma-enhanced atomic layer deposition (PEALD) was employed to coat the LiNi0.8Mn0.1Co0.1O2 (NMC811) configuration with Al2O3 and MoO3. The combined results from morphological examinations revealed the formation of uniform Al2O3 and MoO3 sheets after 200 cycles of PEALD coating. Consistent results from the XRD analysis demonstrate the Al2O3 and MoO3 artificial CEI can reduce the Li-Ni mixing. To shed light on the oxidation-reduction kinetic. The modified NMC811 structures with Al2O3 and MoO3 represented a remarkable improvement in terms of capacity retention. The coated cathode with Al2O3 clearly outperformed the modified configuration with MoO3 with reference to ionic conductivity, charge/discharge reversibility, and capacity retention. The promising results obtained in this study opened possibilities to synthesize the Ni-rich cathodes with boosted electrochemical performance.
