相转移法制备LiNi_(1-x)Mn_xO_2及其电化学性能  

Preparation and Performance of LiNi_(1-x)Mn_(x)O_(2) by Phase Transfer Method

作　　者：柴小琴[1] 刘长久[1] 尚伟[1] 

机构地区：[1]桂林工学院材料与化学工程系,桂林541004

出　　处：《应用化学》2004年第9期905-909,共5页Chinese Journal of Applied Chemistry

基　　金：广西省自然科学基金资助项目 ( 0 3 42 0 0 4 2 )

摘　　要：采用相转移法合成了LiNi1-xMnxO2 粉体。应用XRD、SEM、IR分析表征了其晶体结构及形态特征。将粉体材料制备成电极 ,并与负极锂片组装成模拟电池 ,电化学性能测试结果表明 ,掺杂Mn可增强Ni—O键的强度 ,有利于LiNiO2 2D层状结构的稳定。当n(Li)∶n(Ni)∶n(Mn) =1 2 4∶0 9∶0 1,在 72 0℃焙烧 2 4h时 ,所制备的电极材料氧化还原可逆性好、活性增强、工作电压稳定、首次放电容量达 16 1The cathode materials for a lithium-ion battery LiNi_(x)Mn_(1-x)O_(2) were prepared by a phase transfer method. XRD, SEM, IR, CV and charging-discharging experiments showed that when n(Li)∶n(Ni)∶n(Mn) was 1.24∶0.9∶0.1, and the intermediate gel powders were heated at 400 ℃ for 2 h, followed by sintering at 720 ℃ for 24 h, the redox reversibility of the electrode material was significantly improved; its activity was increased with stead working potential and its first discharging capability achieved 161.8 mA·h/g.

关 键 词：相转移法 LiNi1-xMnxO2 电化学性能 

分 类 号：O646.5[理学—物理化学] TM911.1[理学—化学]