Abstract
Nanostructured LiAl x Mn2 − x O4 − y Br y particles were synthesized successfully by annealing the mixed precursors, which were prepared by room-temperature solid-state coordination method using lithium acetate, manganese acetate, lithium bromide, aluminum nitrate, citric acid, and polyethylene glycol 400 as starting materials. X-ray diffractometer patterns indicated that the particles of the as-synthesized samples are well-crystallized pure spinel phase. Transmission electron microscopy images showed that the LiAl x Mn2 − x O4 − y Br y samples consist of small-sized nanoparticles. The results of galvanostatic cycling tests revealed that the initial discharge capacity of LiAl0.05Mn1.95O3.95Br0.05 is 119 mAh g−1; after the 100th cycle, its discharge capacity still remains at 92 mAh g−1. The introduction of Al and Br in LiMn2O4 bring a synergetic effect and is quite effective in increasing the capacity and elevating cycling performance.
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This work was supported by the Nature Science Foundation of Xinjiang Province (Nos. 200821121 and 200721102) and the National Natural Science Foundation of China (Nos. 20666005 and 20661003).
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Huang, Y., Jiang, R., Bao, SJ. et al. Synthesis and electrochemical properties of nanostructured LiAl x Mn2 − x O4 − y Br y particles. J Solid State Electrochem 13, 799–805 (2009). https://doi.org/10.1007/s10008-008-0757-2
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DOI: https://doi.org/10.1007/s10008-008-0757-2