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| 尖晶石LiMn2O4前驱体的低热固相反应法合成机理及其结构与热分解过程研究 | |
| 引用本文： | 唐新村,何莉萍,陈宗璋,贾殿赠,夏熙.尖晶石LiMn2O4前驱体的低热固相反应法合成机理及其结构与热分解过程研究[J].高等学校化学学报,2003,24(4):576-579. |
| 作者姓名： | 唐新村 何莉萍 陈宗璋 贾殿赠 夏熙 |
| 作者单位： | 1. 湖南大学化学化工学院,长沙,410082;中南大学化学化工学院功能材料所,长沙,410083 2. 湖南大学化学化工学院,长沙,410082 3. 新疆大学应用化学研究所,乌鲁木齐,830046 |
| 摘 要： | 以氢氧化锂、醋酸锰和柠檬酸为原料,采用低热固相反应法制备了Li+与Mn2+摩尔比为1∶2的前驱体化合物LiMn2L(Ac)2.通过元素分析、红外光谱、质谱和热重/差热等测试方法对前驱体的组成、结构、合成反应机理及热分解过程进行了研究.结果表明,可在全固相条件下通过低热固相反应得到锂离子与锰离子达到分子级混合水平的前驱体,该前驱体在350℃下焙烧4h即可出现明显的尖晶石相LiMn2O4产物. |
| 关 键 词： | 低热固相反应 前驱体 尖晶石LiMn2O4 |
| 文章编号： | 0251-0790(2003)04-0576-04 |
| 收稿时间： | 2002-06-03 |
Structure, Preparation Mechanism and Thermo-decomposition Process of LiMn2O4 Precursor Prepared by Low-heating Solid-state Reaction |
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| TANG Xin Cun ,HE Li Ping ,CHEN Zong Zhang \{\},JIA Dian Zeng ,XIA Xi.Structure, Preparation Mechanism and Thermo-decomposition Process of LiMn2O4 Precursor Prepared by Low-heating Solid-state Reaction[J].Chemical Research In Chinese Universities,2003,24(4):576-579. | |
| Authors: | TANG Xin Cun HE Li Ping CHEN Zong Zhang \{\} JIA Dian Zeng XIA Xi |
| Institution: | TANG Xin Cun 1,2,HE Li Ping 1,CHEN Zong Zhang \{1*\},JIA Dian Zeng 3,XIA Xi 3 |
| Abstract: | The precursors were prepared from lithium hydroxide, manganese acetate and citric acid by the method of low heating solid state reaction with the molar ratio of Li+ to Mn 2+ as 1∶2. The composition, structure, reaction mechanism and thermo decomposing process of the precursor were studied by using elemental analysis, IR spectrum, MS spectrum and TG/DTA analysis. The results show that the composition of precursor was fitted as LiMn2L(Ac)2, in which L represents citric acid radical and Ac was acetic acid radical. Spinel LiMn2O4began to form only at 350 ℃ for 4 h. |
| Keywords: | Low heating solid state reaction Precursor Spinel LiMn 2O 4 |
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