溶胶-凝胶法制备尖晶石结构镍锰氧化物型锂离子筛  

Synthesis of Spinal Ni-doped Manganese Oxide Lithium Ion-sieve by Sol-gel Method

作　　者：董殿权[1] 刘维娜[1] 吴延方[1] 刘亦凡[1] 

机构地区：[1]青岛科技大学化工学院,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2009年第4期288-291,296,共5页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金项目(29376245);山东省中青年科学家奖励基金项目(2008BS09004);青岛科技大学科研启动基金资助项目(0022322)

摘　　要：采用溶胶-凝胶法,以乙酸锂、乙酸镍和乙酸锰为主要原料,通过正交试验得到制备镍锰氧化物型锂离子筛LiNixMn2-xO4的适宜条件:x=0.05,柠檬酸作螯合剂,焙烧温度700℃,焙烧时间8 h。用0.5 mol.L-1过硫酸铵作抽锂剂,Mn2+的溶出率较低,仅为0.31%。通过X射线衍射分析证明所合成的锂离子筛为尖晶石结构,每克离子筛对Li+的饱和交换容量达36.72 mg。The LiNixMn2-xO4 was synthesized by a sol-gel method using acetic lithium, nickel and manganese as raw materials. The optimum conditions were obtained by orthogonal experiment, calcining temparature being as 700℃, calcining time as 8 h, x= 0.05, and chelating agent as citric acid. The characterization results showed that the exchange capacity of Li^＋ was 36.72 mg in 1 g LiNi0. 5Mn1.95O4 at saturated level and the Mn^2＋ dissolving rate was only 0. 31% when the precursor was washed with 0.5 mol· L^-1 （NH4）2S2O8 solution. The spinel construction of LiNi0.05Mn1. 9504was conformed by XRD.

关 键 词：锂离子筛 锂锰氧化物 尖晶石结构 溶胶-凝胶法 

分 类 号：O614.111[理学—无机化学] TQ425.221[理学—化学]