高电导率LiAl_(0.3)Co_(0.7-x)Mg_xO_2的制备与表征  

Synthesis and Characterization of LiAl_ (0.3)Co_(0.7-x)Mg_xO_2 with High Electrical Conductivity

作　　者：李畅[1] 徐晓光[1] 孟醒[1] 王春忠[1] 杜菲[1] 景岩[1] 黄桂春[1] 陈岗[1] 

机构地区：[1]吉林大学材料科学与工程学院

出　　处：《高等学校化学学报》2003年第3期462-464,共3页Chemical Journal of Chinese Universities

基　　金：教育部博士学科点基金 (批准号 :2 0 0 10 1830 31);国家自然科学基金 (批准号 :5 0 2 72 0 2 3)资助

摘　　要：用柠檬酸配位聚合法合成了 Li Al0 .3Co0 .7-x Mgx O2 (x=0 .0 1～ 0 .1 3 )粉体 ,并进行了 X射线衍射 (XRD)和透射电子显微镜 (TEM)的表征 .结果发现晶粒粒径都小于 1 μm,且在 x≤ 0 .1 1的范围内 ,材料的 XRD谱峰形锐利 ,表明 80 0℃下材料有良好的结晶性 ,通过对几组衍射峰的标定 ,确定材料保持了六方层状α-Na Fe O2 结构 。A series of LiAl_ 0.3Co_ 0.7-xMg_xO_2(x=0.01-0.13) powders were synthesized and characterized by XRD and TEM measurements. The results show that the crystal size is under 1 μm. When x≤0.11, the peaks in the XRD patterns are very sharp which indicate that the materials are well crystallized. After indexing the peaks, it was confirmed that the materials formed an α-NaFeO_2 structure which ensured the lithium ions pass fluently during the charge-discharge process.

关 键 词：电导率 LiAl0.3Co0.7-xMgxO2 制备 表征 锂电池 阴极材料 钴酸锂 铝 镁 掺杂 

分 类 号：TM912[电气工程—电力电子与电力传动] TM2[一般工业技术—材料科学与工程]