原料对液-固燃烧法合成尖晶石型LiMn_2O_4的影响

Effect of Different Raw Materials on Liquid-Solid Combustion Synthesis of Spinel LiMn_2O_4

以晶体醋酸锂或尿素为反应体系的液相,研究了不同锂和锰为原料,液-固燃烧合成制备尖晶石型LiMn2O4的影响.实验结果表明,不同锂和锰为原料对液-固燃烧合成LiMn2O4的影响较大,其中醋酸锂和二氧化锰为原料,可得到单相的尖晶石型LiMn2O4的产物,但加入尿素不利于合成LiMn2O4;以碳酸锂和二氧化锰或碳酸锂和碳酸锰为原料,产物中都有杂质,但碳酸锂和二氧化锰为原料优于碳酸锂和碳酸锰为反应原料.

The effect of different raw materials on liquid -solid combustion synthesis of LiMn2O4 was investigated by using lithium acetate or urea as the liquid phase of the reaction system. The results indicated that the phase formation of liquid - solid combustion synthesized LiMn2O4 is affected greatly by different Li, Mn sources as raw materials; it obtained the single phase of Spinel LiMn2O4 when the raw materials were the lithium acetate and manganese dioxide, but the added urea was not beneficial to synthesize LiMn2O4. There are some impurities in the product when using lithium acetate and manganese dioxide or lithium acetate and manganese acetate as starting materials, but the starting materials by lithium acetate and manganese dioxide was superior to the reactants by lithium acetate and manganese acetate.