摘要
以球形Ni（OH）2、Co3O4、Mn3O4及LiOH为原料,用超细球磨-喷雾干燥法得到前驱体,再用高温固相法制备正极材料LiNi1/3Co1/3Mn1/3O2。在900℃下焙烧12 h制备的材料具有良好的六方单相层状-αNaFeO2结构,粒径均匀地分布于1-3μm;在2.8-4.3 V循环,0.1C、2.0C首次放电比容量分别为162.5 mAh/g、138.6 mAh/g,第30次0.1C循环的容量保持率为98.8%,;当充电截止电压提高至4.6 V时,0.1C放电比容量增加至约200 mAh/g,且循环性能稳定。
The precursor was obtained by ultra-fine ball-milling-spray drying method with spherical Ni（OH）2,Co3O4,Mn3O4 and LiOH as raw materials,then synthesizing cathode material LiNi1/3Co1/3Mn1/3O2 by high-temperature solid-state method.The material synthesized by calcining at 900 ℃ for 12 h had optimal hexagonal α-NaFeO2 layered structure,the particle size was uniformly distributed in 1～3 μm.When cycled in 2.8～4.3 V,the 0.1 C,0.2 C initial specific discharge capacity was 162.5 mAh/g,138.6 mAh/g,respectively,the capacity retention was 98.8% at the 30th 0.1 C cycle.When the charging end voltage increased to 4.6 V,its 0.1 C specific discharge capacity increased to about 200 mAh/g,the cycle performance was stable.
出处
《电池》
CAS
CSCD
北大核心
2011年第3期141-144,共4页
Battery Bimonthly
关键词
锂离子电池
层状正极材料
超细球磨
喷雾干燥
Li-ion battery
layered structure cathode material
ultra-fine ball-milling
spray drying
