Synthesis of highly crystalline spinel LiMn2O4 by a soft chemical route and its electrochemical performance |
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Authors: | Jia-Yan Luo Yong-Yao Xia |
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Affiliation: | a Chemistry Department and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China b Gejiu Superhoo Industrial Co., Ltd., Gejiu 661000, China |
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Abstract: | Highly crystalline spinel LiMn2O4 was successfully synthesized by annealing lithiated MnO2 at a relative low temperature of 600 °C, in which the lithiated MnO2 was prepared by chemical lithiation of the electrolytic manganese dioxide (EMD) and LiI. The LiI/MnO2 ratio and the annealing temperature were optimized to obtain the pure phase LiMn2O4. With the LiI/MnO2 molar ratio of 0.75, and annealing temperature of 600 °C, the resulting compounds showed a high initial discharge capacity of 127 mAh g−1 at a current rate of 40 mAh g−1. Moreover, it exhibited excellent cycling and high rate capability, maintaining 90% of its initial capacity after 100 charge-discharge cycles, at a discharge rate of 5 C, it kept more than 85% of the reversible capacity compared with that of 0.1 C. |
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Keywords: | LiMn2O4 Lithiated manganese dioxide Rechargeable lithium batteries Cathode material Highly crystalline |
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