Morphology and electrochemistry of LiMn2O4 optimized by using different Mn-sources |
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| Authors: | Shu-Juan Bao Chang-Ming Li Hu-Lin Li John HT Luong |
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| Affiliation: | 1. School of Chemical and Biomedical Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798, Singapore;2. College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China;3. National Research Council Canada, Biotechnology Research Institute, Montreal, Canada H4P2R2 |
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| Abstract: | Spinel-typed LiMn2O4 cathode active materials have been prepared for different microstructures by the melt-impregnation method using different forms of manganese. The effect of the starting materials on the microstructure and electrochemical properties of LiMn2O4 is investigated by X-ray diffraction, scanning electron microscopy, and electrochemical measurements. The powder prepared from nanostructured γ-MnOOH, with good crystallinity and a regular cubic spinel shape, provided an initial discharge capacity of 114 mAh g−1 with excellent rate and high capacity retention. These advantages render LiMn2O4 attractive for practical and large-scale applications in mobile equipment. |
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| Keywords: | Lithium-ion batteries γ-MnOOH LiMn2O4 Spinel-type Discharge rate Capacity retention |
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