1 Department of Chemical Engineering,
Wu-Feng Institute of Technology, Ming-Hsiung, Chiayi, Taiwan 621, R.O.C.
2 Department of Materials Science and Engineering,
National Tsing-Hua University, Hsinchu, Taiwan 300, R.O.C.
| Spinel LiMn2-xCoxO4 (0 ≤ x ≤ 0.20) powders with small and uniform particle size were successfully synthesized by microwave-induced combustion, which used lithium nitrate, manganese nitrate, cobalt nitrate, and urea as the starting materials. The LiMn2-xCoxO4 powders synthesized by microwave-induced combustion were investigated by x-ray diffractometer (XRD). The LiMn2-xCoxO4 samples were used as cathode materials for lithium-ion battery, which their discharge capacity and electrochemical characteristic properties in terms of cycle performance were also discussed in this paper. The results revealed that the LiMn2O4 cell synthesized by microwave-induced combustion provided a high initial capacity of 133mAh/g and excellent reversibility compared to C solid-state reaction. In addition, the Li/LiMn2-xCoxO4 cells with excellent capacity and reversibility were attributed to dope Cr stability of the spinel structure. |
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