Abstract
A rheological phase method has been successfully applied to synthesize a layered lithium nickel cobalt iron oxide Li(Co0.5 Ni0.5)1−y Fe y O2 (0 ≤ y ≤ 0.10), a promising cathode material of lithium-ion batteries. The impacts of Fe content and reaction conditions on the material structure are characterized by means of x-ray diffraction, scanning electron microscopy and transmission electron microscopy. Electrochemical properties are investigated in detail under different conditions as cathode materials of lithium-ion batteries. It is found that the average sizes of the prepared powders are about 100 nm. Compared to other samples, Li(Co0.5Ni0.5)0.95Fe0.05O2 shows the lowest cation mixing, the smallest impedance, the best reversible capacity and cycling performance. The initial discharge capacity is 146.9 mAhg−1 in 3.0–4.3 V. The cyclability is better after several cycles, which shows great prospects for use in lithium-ion batteries.
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Cheng, C., Chen, F. & Yi, H. Synthesis and Electrochemical Properties of Layered Li(Co0.5Ni0.5)1−y Fe y O2 (0 ≤ y ≤ 0.10) as a Cathode Material for Lithium-Ion Batteries. J. Electron. Mater. 44, 3738–3743 (2015). https://doi.org/10.1007/s11664-015-3917-z
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DOI: https://doi.org/10.1007/s11664-015-3917-z