Synthesis and characterization of LiMgyMn2�?�yO4 cathode materials by a modified Pechini process for lithium batteries

[摘要] Cubic spinels of composition, LiMg_yMn_{2â€�?�y}O₄, with ð‘�? = 0.0, 0.05, 0.1, 0.15 and 0.2, were synthesized by a modified Pechini process using polyethylene glycol and citric acid. The phase formation and/or crystallization of the precursors were studied by thermal analysis. Products were characterized by X-ray diffraction and SEM analysis. Coin cells were fabricated with lithium as the anode and LiMg_yMn_{2â€�?�y}O₄ as the cathode in an electrolyte of 1 M LiPF₆ in a 1 : 1 (v/v) mixture of EC and DEC. The chargeâ€�?�discharge studies were performed and the results were compared with materials prepared by a solid state thermal method.

[学科分类] 材料工程

[关键词] Lithium batteries;cathode material;modified Pechini process;cubic spinel materials.