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- W2020837730 abstract "Layered LiNi0.5Mn0.5O2−xFx (0 ⩽ x ⩽ 0.04) has been successfully synthesized via hydroxide co-precipitation method and solid-state reaction method. The crystal structure and morphology of the materials were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. It is found that the LiNi0.5Mn0.5O1.96F0.04 synthesized at 950 °C for 30 h in air atmosphere show the smooth and regular structure in the particle size range of 0.77–1.13 μm. The initial discharge capacity was 176.2 mAh g−1 between 2.8 and 4.6 V at 0.2 C ratio (1 C = 200 mAh g−1). The reversible capacity was 87.9% of the initial discharge capacity at cut-off voltage of 4.60 V after 50 cycles at 0.2 C, 0.5 C and 1.0 C ratio. The lithium ion diffusion coefficient of LiNi0.5Mn0.5O1.96F0.04 was 4.34 × 10−13 cm2 s−1, which was much greater than that of the LiNi0.5Mn0.5O2. The excellent electrochemical performance could be attributed to its lower Li/Ni exchange ratio and larger lithium ion diffusion coefficient. It was demonstrated that doping F process was a useful and efficient approach to reduce the cation mixing and improve the poor rate performance of LiNi0.5Mn0.5O2 material." @default.
- W2020837730 created "2016-06-24" @default.
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- W2020837730 date "2013-12-01" @default.
- W2020837730 modified "2023-09-23" @default.
- W2020837730 title "Preparation and electrochemical performance of LiNi0.5Mn0.5O2−xFx (0⩽x⩽0.04) cathode material synthesized with hydroxide co-precipitation for lithium ion batteries" @default.
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- W2020837730 doi "https://doi.org/10.1016/j.jallcom.2013.05.223" @default.
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