5V锂离子电池正极材料LiNi_(0.5)Mn_(1.5)O_4的低温燃烧法合成及性能研究  

Low-Temperature Combustion Synthesis and Performance of LiNi_(0.5)Mn_(1.5)O_4 as Cathode Materials for Li-ion Batteries

作　　者：赵巧丽[1,2] 叶乃清[1,2] 喜全芳 黄耀志[2] 

机构地区：[1]有色金属及材料加工新技术教育部重点实验室,桂林541004 [2]桂林工学院材料与化学工程系,桂林541004 [3]中国石油长城钻探工程公司物资分公司,天津300457

出　　处：《化学通报》2009年第11期1045-1048,共4页Chemistry

基　　金：广西自然科学基金项目(0832256)资助

摘　　要：以LiNO3、Ni(NO3)2.6H2O、Mn(NO3)2和CO(NH2)2为原料,采用低温燃烧法成功合成了5V锂离子电池正极材料LiNi0.5Mn15O4。通过XRD、SEM、循环伏安和恒电流充放电实验对合成样品进行了表征。结果表明,在850℃合成的正极材料LiNi0.5Mn1.5O4具有立方尖晶石结构,规则的八面体晶形,粒度适中,比较均匀。合成产物具有良好的电化学性能,其充放电电压平稳,放电平台高达4.7V,4V放电平台几乎消失;放电容量达到124.92mAh/g,50次循环后放电容量仍可达到120.84mAh/g。The cathode material LiNi0.5Mn1.5O4 for 5V lithium-ion batteries was successfully synthesized by low- temperature combustion process using LiNO3, Ni （NO3）2 ·6H2O, Mn（NO3 ）2 and CO （NH2）2 as starting materials. The samples were characterized by XRD, SEM, CV and galvanostatic charge discharge test. The results indicated that LiNi0.5 Mn1.5O4 synthesized at 850℃ has cubic spinel structure with clearly defined octahedral shape, and the particles are quite homogeneous. The synthesized material has excellent electrochemical performance, the change of voltage is slow and stable in the charge/discharge process, its discharge voltage plateau is higher up to 4.7V, the 4V voltage plateau almost disappear; its discharge capacity is up to 124.92mAh/g,aud retains 120.84mAh/g after 50 cycles. Keywords L-ion batteries, Cathode materials, LiNio.5 Mna.5 04, Low-temperature combustion synthesis

关 键 词：锂离子电池 正极材料 LINI0.5MN1.5O4 低温燃烧法 

分 类 号：TM912[电气工程—电力电子与电力传动] TB383[一般工业技术—材料科学与工程]