【作者】 刘贵阳； 戴志福； 郭俊明； 张黎黎； 王宝森；

【Author】 LIU Gui-yang, DAI Zhi-fu, GUO Jun-ming, ZHANG Li-li, WANG Bao-sen (College of Science, Honghe University, Mengzi 661100,China)

【机构】 红河学院理学院；

【摘要】 以锂、锰的醋酸盐为原料,尿素为燃料,使用液相燃烧合成法制备了尖晶石型LiMn2O4,研究了不同尿素含量和不同起燃温度对所制备尖晶石结构的影响。研究发现,液相燃烧法能够成功的制备出纯净的尖晶石型LiMn2O4,尿素含量或起燃温度太高或太低, 都不能获得结晶性较好的LiMn2O4。当尿素与锰离子的摩尔比为2．5,起燃温度为550-650℃时,制备得到的LiMnzO4晶体结构较好。更多还原

【Abstract】 Spinel LiMn2O4 was prepared by liquid combustion synthesis using urea as fuel, and lithium acetate and manganese acetate as raw materials. The effect caused by different amount of urea and different start temperatures was investigated. The results indicated that pure spinel LiMn2O4 was synthesized successfully by the present method, and LiMn2O4 with good crystallinity could not be obtained when urea content or-start temperatures too high or too low. LiMn2O4 with good structures was obtained in the condition of the mole ratio of urea and Mn2+ as high as 2. 5 and the start temperature between 550℃ and 650℃.更多还原