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- W2892322323 abstract "In this work, Li-rich layered oxide materials of Li1.2Mn0.54Co0.13Ni0.13O2 nano/micro hierarchical microrods are easily synthesized using a solvothermal method. Li2MnO3, a Li-rich layered oxide with a framework that is consistent with that of the host, is coated onto the surface of Li1.2Mn0.54Co0.13Ni0.13O2 microrods by a facile sol–gel method. Investigations with X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscope (TEM) and galvanostatic charge/discharge reactions reveal that surface-modified Li1.2Mn0.54Co0.13Ni0.13O2 microrods present better rate performance and cycling stability than other samples. The best electrochemical performance of the surface-modified Li1.2Mn0.54Co0.13Ni0.13O2 microrods is obtained with a layer composed of 5 wt% Li2MnO3 (∼10 nm thick), which provides very high discharge capacities of 244 and 159.5 mAh g−1 at C-rates of 1C and 10C, respectively (1C = 200 mAg−1), and excellent cycling stability (after 80 cycles, capacity retention of 96.0% at 1C). The composite's remarkably improved cyclability and rate capability are attributed to the combination of the nano/micro hierarchical microrod structure and the Li2MnO3-modified surface, which reduce structural degradation during electrochemical cycling. Results also show that the Li2MnO3 surface-modified Li1.2Mn0.54Co0.13Ni0.13O2 microrods significantly decelerate voltage decay and improve the initial coulombic efficiency (76.4%)." @default.
- W2892322323 created "2018-09-27" @default.
- W2892322323 creator A5015074039 @default.
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- W2892322323 date "2019-01-01" @default.
- W2892322323 modified "2023-10-05" @default.
- W2892322323 title "Improving the rate capability and decelerating the voltage decay of Li-rich layered oxide cathodes by constructing a surface-modified microrod structure" @default.
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- W2892322323 doi "https://doi.org/10.1016/j.jallcom.2018.09.046" @default.
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