Low-Temperature Self-Mixing Combustion Synthesis of Spinel LiMn₂O₄: Effect of Igniting Temperatures

Abstract:

In this paper, a low-temperature self-mixing combustion synthesis method was introduced to prepare spinel LiMn₂O₄. Low-melting raw materials and fuel (acetate salts as starting materials and urea as fuel) were molten to a homogeneous liquid mixture at ~100°C. The mixture was then ignited and calcined at a higher temperature, final products were obtained. The products were determined by X-ray diffraction (XRD) and scanning electric microscope (SEM). XRD analysis indicated that product with higher purity was obtained at 550°C for 5h when the molar ratio of Li:Mn:urea=1:2:4. The impurity Mn₂O₃ was appeared in the products when the igniting temperature >600°C, and the content of Mn₂O₃ increased with the increasing igniting temperatures. SEM investigation indicated that the particles of the products were small and agglomerated. The igniting temperature monitoring indicated that the combustion reaction rate increased with increasing igniting temperature, and this did not favor for the formation of LiMn₂O₄.

• Periodical: Applied Mechanics and Materials (Volumes 80-81)
• Pages: 440-443
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.80-81.440
• Online since: July 2011
• Authors: Gui Yang Liu, Jun Ming Guo, Bao Sen Wang, Ying He, Li Li Zhang
• Keywords: Lithium-Ion Battery, Low-Temperature Self-Mixing Combustion Synthesis, Spinel

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