LiMn2O4的甘氨酸法合成  

The synthesis of LiMn_2O_4 by the glycine method

作　　者：胡卫国[1] 黄可龙[1] 申国培 李永坤[1] 

机构地区：[1]中南大学化学化工学院,湖南长沙410083 [2]广州鸿森材料有限公司,广东广州510760

出　　处：《电池》2008年第1期8-10,共3页Battery Bimonthly

基　　金：国家自然科学基金资助项目(20376086,50542004)

摘　　要：用甘氨酸法合成锂锰氧化合物,通过FTIR、NMR和TG/DTA等研究了锂锰-甘氨酸前驱体的组成、结构和锂锰氧化合物的形成机理,并对LiMn2O4样品进行XRD分析。甘氨酸法可在低温下反应,得到原子级水平混合的锂离子与锰离子前驱体;在356℃左右就可得到尖晶石LiMn2O4;在400℃下煅烧合成的样品以纯尖晶石LiMn2O4存在,在750℃下煅烧合成的LiMn2O4样品,0.2C首次放电比容量为119.8 mAh/g,20次循环后放电比容量为118.4 mAh/g。Lithium manganese oxide compounds were synthesized by the glycine method. The composition and structure of the lithium manganese glycine precursors, the synthesis mechanism of lithium manganese oxide compounds were studied by FT-IR, NMR and TG/DTA. The LiMn2O4 samples were studied by XRD. The lithium ions and manganese ions in the precursor were mixed at atomic level by the glycine method at low temperature, the spinel LiMn2O4 could obtain at about 356 ℃. The sample sintered at 400 ℃ was pure phase spinel LiMn2O4. The 0.2 C initial specific discharge capacity of LiMn2O4 sample sintered at 750 ℃ was 119.8 mAh/g. After 20 cycles, the specific discharge capacity was 118.4 mAh/g.

关 键 词：锂离子电池 甘氨酸法 合成机理 

分 类 号：TM912.9[电气工程—电力电子与电力传动]