Effect of Temperature on Spinel LiMn₂O₄ by Molten-Salt Flameless Combustion Synthesis

Abstract:

Effect of calcination temperature on spinel LiMn₂O₄ by molten-salt flameless combustion synthesis using the lithium acetate (lithium nitrate), manganese acetate (manganese nitrate) as raw materials was studied. The structural characterization and morphology of the powder were measured by X-ray diffraction and Scanning electron microscopy. The results indicated that the main phase was LiMn₂O₄, which could be obtained at 400-700 °C. The product crystallinity and particle size increased with increasing calcination temperature, but the capacity and cyclic stability decreased. When LiMn₂O₄ was calcinated at 400 °C and 500°C, the initial specific capacity at 0.1C rate was 104.2 and 101.5 mAh·g^-1, respectively. After 30 cycles, the discharge capacity retention rate was 80.4 % and 83.5 %, respectively. The performance was the worst when LiMn₂O₄ was calcinated at 700°C, when the initial specific capacity was only 81.9 mAh·g^-1.

• Periodical: Applied Mechanics and Materials (Volumes 80-81)
• Pages: 153-157
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.80-81.153
• Online since: July 2011
• Authors: Mei Huang, Yan Xia, Jun Ming Guo, Ying Jie Zhang
• Keywords: Cathode Material, Lithium-Ion Battery, Molten-Salt Flameless Combustion Synthesis, Spinel LiMn₂O₄

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