Abstract
With the rapid development of electric vehicles in recent years, high-energy layered lithium Ni-rich oxides have attracted much attention. However, the ever-increasing cobalt price and stability issues of Ni-rich cathodes pose substantial obstacles to the practical application of lithium-ion batteries (LIBs). Here, we employed a one-step method to synthesize a CeO2-coating LiNi0.96Mg0.02Ti0.02O2 (NMT@Ce) cathode with reliable interface and structure. The CeO2 coating layer can prevent cathodes from electrolyte assault and form oxygen vacancies to improve the material thermal stability. The as-obtained LiNi0.96Mg0.02Ti0.02O2-0.5 wt% Ce (NMT@Ce-0.5%) delivers a high specific capacity (177.8 mAh·g−1 at 1 C) and good durability (96.7% after 100 cycles at 1 C). This modification method significantly enhances the stability of the interface and structure for Ni-rich Co-free cathode material, accelerating the commercialization of high-energy–density LIBs.
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This work was supported by the project of the National Natural Science Foundation of China (Grand No. 22005254).
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Xiao, Y., Wang, Z., Wan, Q. et al. Enhanced interfacial and structural stability of Ni-rich LiNi0.96Mg0.02Ti0.02O2 cathode using a CeO2-coating technique. Ionics 28, 5039–5048 (2022). https://doi.org/10.1007/s11581-022-04748-4
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DOI: https://doi.org/10.1007/s11581-022-04748-4