Chen Z., Zhu H., Ji S., Linkov V., Zhang J., Zhu W.
Institution of Materials Science and Engineering, Department of Physics and Electronic Sciences, Changsha University of Science and Technology, Changsha, 410076, China; South Africa Institute for Advanced Materials Chemistry, University of the Western Cape, Bellville, 7535, South Africa
Chen, Z., Institution of Materials Science and Engineering, Department of Physics and Electronic Sciences, Changsha University of Science and Technology, Changsha, 410076, China; Zhu, H., Institution of Materials Science and Engineering, Department of Physics and Electronic Sciences, Changsha University of Science and Technology, Changsha, 410076, China; Ji, S., South Africa Institute for Advanced Materials Chemistry, University of the Western Cape, Bellville, 7535, South Africa; Linkov, V., South Africa Institute for Advanced Materials Chemistry, University of the Western Cape, Bellville, 7535, South Africa; Zhang, J., Institution of Materials Science and Engineering, Department of Physics and Electronic Sciences, Changsha University of Science and Technology, Changsha, 410076, China; Zhu, W., Institution of Materials Science and Engineering, Department of Physics and Electronic Sciences, Changsha University of Science and Technology, Changsha, 410076, China
LiNi0.5Mn1.5O4 was prepared through a solid-state reaction using various Ni precursors. The effect of precursors on the electrochemical performance of LiNi0.5Mn1.5O4 was investigated. LiNi0.5Mn1.5O4 made from Ni(NO3)2·6H2O shows the best charge-discharge performance. The reversible capacity of LiNi0.5Mn1.5O4 is about 145 mAh g-1 and remained 143 mAh g-1 after 10 cycles at 3.0-5.0 V. The XRD results showed that the precursors and the dispersion methods had significant effect on their phase purity. Pure spinel phase can be obtained with high energy ball-milling method and Ni(NO3)2·6H2O as precursor. Trace amount of NiO and Li2MnO3 phase were detected in LiNi0.5Mn1.5O4 with manual-mixture method and using Ni(CH3COO)2·6H2O, NiO and Ni2O3 as precursors. © 2008 Elsevier B.V. All rights reserved.
Ball milling; Cathodes; Lithium; Lithium alloys; Lithium batteries; Manganese; Nickel; Cathode materials; Charge-discharge performance; Dispersion methods; Electrochemical performance; High energies; LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub>; Lithium ion battery; Mixture methods; Phase purities; Reversible capacities; Solid-state reactions; Spinel; Spinel phase; Trace amounts; XRD; Manganese compounds
