Synthesis and Electrochemical Properties of Modification LiNi1/3Co1/3Mn1/3O2 Cathode Materials for Li-ion Battery
The layered LiNi1/3Co1/3Mn1/3–x Mg x O2 (x = 0, 0.01, 0.03, 0.05) cathode materials were prepared by solid state reaction, then copper oxide was coated on the product. The structures, morphologies and electrochemical properties of the LiNi1/3Co1/3Mn1/3–x Mg x O2 and CuO-coated LiNi1/3Co1/3Mn1/3–x Mg x O2 were characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM), and electrochemical tests. The results showed that the electrochemistry properties and cycle performance of magnesium doped LiNi1/3Co1/3Mn1/3O2 and CuO-coated LiNi1/3Co1/3Mn1/3–x Mg x O2 materials were improved. The optimal doping content of Mg was x = 0.03 in the LiNi1/3Co1/3Mn1/3–x Mg x O2 samples to achieve high discharge capacity and good cyclic stability, and the first discharge special capacity was 158.5 mAh/g at 0.2 C in the voltage of 2.5–4.3 V, then CuO-coated LiNi1/3Co1/3Mn1/3–0.03Mg0.03O2 was investigated. The electrode reaction reversibility and electronic conductivity were enhanced through Mg-doped and CuO-coated.
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Document Type: Research Article
Publication date: 01 March 2012
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