锂离子电池正极材料Li_(1+y)Z_nxMn_(2-x)O_4的相转移法合成及性能研究  

Preparation of Cathode Material Li_(1+y)Z_nxMn_(2-x)O_4 for Lithium-Ion Battery by Phase Transfer Method

作　　者：刘长久[1] 柴小琴[1] 陈婧娟[1] 

机构地区：[1]桂林工学院,广西桂林541004

出　　处：《稀有金属材料与工程》2006年第2期283-286,共4页Rare Metal Materials and Engineering

基　　金：广西自然科学基金资助项目(0342004-2)

摘　　要：采用相转移法制备富锂掺锌的锰酸锂前驱体,然后在空气中进行焙烧反应合成了尖晶石型的Li1+yZnxMn2-xO4粉体材料,并测试其结构形态特征。考察了该法合成的工艺条件对合成试样粉体产物电化学性能的影响。结果表明:当nLi:nZn:nMn=1.1:0.1:1.9时,反应时间为2h,在750℃空气环境下焙烧10h合成试样粉体过程较为简单,电极试样以10mA/g的恒电流密度充电至4.5V,并以相同的10mA/g恒电流密度放电至3.0V,其放电平台稳定在3.9V,比容量达到120mAh/g,性能稳定。Making use of the CH3（CH2）6·CH3 as phase transfer reagent, precursor Li1＋yZnxMn2-xO4 was prepared by the method of phase transfer. The precursor was sintered in the air atmosphere to obtain the spinel cathode material. The structure characters of the sample were tested. The effects of the synthesis technique condition on the electrochemical performance were studied. The results show that the synthesized materials have an obvious spinel structure, though the operation technique is simple. The optimum technical conditions： nLi：nzn：nMn= 1.1：0.1：1.9, the reaction time being 2 h, and the precursor being sintered at 750℃ for 10 h. When charging and discharging at 10 mA/g and 3.0 V-4.5 V, the specific capacity reach 120 mAh/g, its work potential is calmed at 3.9 V.

关 键 词：锂离子电池 相转移法 Li1+yZnxMn2-xO4 电化学性能 

分 类 号：TM912[电气工程—电力电子与电力传动]