摘要
以LiOH·H2O与硫酸混合盐（Mn：Ni：Co=1：1：1）为原料，用液相共沉淀法合成前驱体钴镍锰复合氢氧化物，然后与Li2CO3混合，在不同的焙烧条件下合成LiNi1／3Co1/3Mn1／3O2。通过X射线衍射、DSC-TGA、SEM、充放电测试等手段对材料的物理性能、反应机理及电化学性能进行了研究。结果表明，用此方法合成的LiNi1/3Co1/3Mn1/3O2具有单一的层状岩盐结构。采用500℃预焙烧，再经800℃焙烧的工艺条件所得产品的X衍射峰尖锐，结构规整。表面微粒较大；充放电测试表明，在4.6～2．5V的初始放电容量达到167．9mAh／g。
LiNi1/3CO1/3Mn1/3O2 materials are synthesized by firing the mixture of precursor-hydroxide compound of cobalt nickel manganese and Li2 CO3 under different conditions. The precursor is co-precipitated by using starting materials LiOH · H2O and sulphates （molar ratio Mn ： Ni ： Co = 1 ： 1 ： 1 ）. LiNi1/3Co1/3Mn1/3O2 powders are characterized by means of X-Ray diffraction （ XRD ）, DSC-TGA, scanning electron microscopy （ SEM ）, charge/discharge cycling. XRD shows that LiNi1/3 Co1/3 Mn1/3O2 is a single layered rock salt structure. As LiNi1/3 Co1/3 Mnl/3O2 calcined in 500℃ in advance has good performances ,which suggests sharp X diffraction intensity, the complete crystallite configure, big surface particle size, and the initially discharge capacity 167.9 mAh/g in 4. 6 -2. 5V.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2005年第F05期266-268,共3页
Materials Reports
基金
国家863基金资助项目（2003AA32X10）
关键词
前驱体
锂钴镍锰复合氧化物
共沉淀
电化学性能
precursor, lithium cobalt-nickel-manganese oxide compound, co-precipitate, electrochemical performance
