LiCoVO_4新型陶瓷材料的Chimie Douce法合成及其价键振动研究  

STUDY ON CHIMIE-DOUCE-METHOD SYNTHESIS AND VIBRATION MODES OF NOVEL CERAMIC MATERIAL LiCoVO_4

作　　者：麦立强[1] 陈文[1] 徐庆[1] 朱泉峣[1] 杨慧鹏[1] 谢永贤[1] 

机构地区：[1]武汉理工大学材料学院,430070

出　　处：《陶瓷学报》2003年第3期129-132,共4页Journal of Ceramics

基　　金：国家自然科学基金(编号 :5 980 2 0 0 9;5 0 0 62 0 0 1);高等学校优秀青年教师科研奖励计划资助项目

摘　　要：通过改进的ChimieDouce法制备出高电压阴极材料LiCoVO4 ,XRD测试表明高结晶单相LiCoVO4 在 45 0℃形成。LiCoVO4 位于82 0cm- 1 处的红外吸收带和拉曼吸收带分别归属于VO4 四面体具有A1 对称的伸缩振动和VO4 四面体中V -O键振动的内模振动峰 ,而 3 3 5cm- 1 处的红外和拉曼吸收带则对应于VO4 四面体具有E对称的变角振动。A modified Chimie Douce method was introduced for preparing inverse spinel LiCoVO 4 as novel high-voltage cathode material for Li-ion batteries.Investigations were coducted by XRD,IR,Laman and electrochemical techniques.The results of XRD show the high crystalline LiCoVO 4 with high phase purity are formed at 450℃.The results of the IR and Laman investigations show that the band located at ～820cm -1 corresponding to the stretching vibration mode with the A 1 symmetry,whereas the band situated at ～335cm -1 corresponds to the bending mode of VO 4 tetrahedron with E symmetry.

关 键 词：LiCoVO4 陶瓷材料 ChimieDouce法 合成 价键振动 高电压阴极材料 

分 类 号：TQ174.758[化学工程—陶瓷工业]