Optimization of the Synthesis Conditions of LiMnPO₄ for Lithium Secondary Battery by Solid State Method

Abstract:

In order to enhance the electrochemical performance of LiMnPO4 cathode material, we optimized the synthesis conditions of LiMnPO4 using a simple solid state reaction. The influence of factors of the pre-sintering temperature, carbon source and molar ratio of Zn to Mn, as well as the electrochemical properties of obtained LiMnPO4 powder were studied. The precursor of Zn-doping LiMnPO4/C was characterized by Differential Scanning Calorimetry and thermogravimetry. The microstructure of the samples was characterized by X-ray diffraction (XRD). The optimized LiMnPO4 cathode has good electrochemical properties and its discharge capacity could reach 140.2 mAh g−1 at 0.02 C rate and 111.3 mAh g−1 at 0.1 C rate with satisfactory cycling performance. It implies that the synthesis of LiMnPO4/C composite with excellent electrochemical performances can be achieved by a simple solid state method, which will boost the practical application of LiMnPO4 cathode materials.

• Periodical: Advanced Materials Research (Volumes 602-604)
• Pages: 1044-1049
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.602-604.1044
• Online since: December 2012
• Authors: You Rong Wang, Han Tao Liao, Jia Wang, Yu Chan Zhu, Si Qing Cheng
• Keywords: Carbon Source, LiMnPO₄, Lithium-Ion Battery, Solid State Method, Zn-Doping

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