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• W3205998045 endingPage "131359" @default.
• W3205998045 startingPage "131359" @default.
• W3205998045 abstract "• NCM613 cathodes were modified by a wet grinding method with NaH 2 PO 2 . • The modified NCM613-0.3P shows the retention of 81.5% after 500 cycles at 1C. • The rock salt/spinel phase coatings on NCM613-0.3P improve the cycle stability. • Phosphate doping in NCM613-0.3P enhances the rate performance. • The wet grinding method was useful to improve the performance of NCM811. Ni-rich layered cathodes LiNi x Co y Mn 1-x-y O 2 (x ≥ 0.6) with high capacity and low manufacturing cost have aroused widespread concern. However, the surface/interface instability and structural degradation can reduce their service life. Aiming at modifying the electrochemical performance of Nickel rich NCM via introducing oxygen defects as well as forming protective coating layers, herein, a wet grinding procedure was explored to treat the mixture of NCM613 and a small amount of the phosphorus precursor NaH 2 PO 2 following by a low-temperature calcination. The results indicate that the modified samples possess the rock salt/spinel phase coating layer and PO 4 3− doping, which synergistically improve the cycle stability and rate performance of NCM613. After 500 cycles at 1C (2.8–4.5 V), the modified samples NCM613-0.3P and NCM613-0.6P show the retention of 81.5% and 85.9%, respectively. Even after 350 cycles at 5C, NCM613-0.6P exhibits an impressive capacity retention of 98.0%, extremely superior to the pristine NCM613 (25.7%). Moreover, for other Ni-rich layered cathode material (LiNi 0.8 Co 0.1 Mn 0.1 O 2 ), such procedure can be applied successfully to improve the cycle stability. This work provides a useful modification strategy to enhance the stability of Ni-rich cathode materials." @default.
• W3205998045 created "2021-10-25" @default.
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• W3205998045 date "2021-12-01" @default.
• W3205998045 modified "2023-10-14" @default.
• W3205998045 title "In-situ construction protective layer and phosphate doping synergistically improve the long-term cycle stability of LiNi0.6Co0.1Mn0.3O2" @default.
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• W3205998045 doi "https://doi.org/10.1016/j.cej.2021.131359" @default.
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