混合碱法制备尖晶石型LiMn_2O_4纳米棒及其表征  

Preparation and Characterization of Spinel LiMn_2O_4 Nanorods by Composite-hydroxide-mediated Method

作　　者：张萍[1,2] 王甫丽[3] 王焕英[4] 武戈[1] 张艳峰[2] 

机构地区：[1]石家庄学院化工学院,河北石家庄050035 [2]河北师范大学化学与材料科学学院,河北石家庄050024 [3]河北建筑工程学院数理系,河北张家口075000 [4]衡水学院化工学院,河北衡水053000

出　　处：《河北师范大学学报（自然科学版）》2014年第2期178-181,共4页Journal of Hebei Normal University：Natural Science

基　　金：国家自然科学基金(111790229);河北省科技攻关课题(05212701D)

摘　　要：以MnSO4·H2O和LiOH·H2O为原料,NaOH和KOH为溶剂,利用混合碱法制备了尖晶石型LiMn2O4纳米棒,并系统地研究了不同反应条件对比表面积的影响.制备LiMn2O4纳米棒的适宜工艺条件:Li和Mn物质的量比为1.1∶2,反应温度200℃,反应时间24h.采用表面与孔径测定仪、X射线衍射仪、红外光谱仪和扫描电镜对产品进行了表征,并得出结论:混合碱法制备的LiMn2O4粒度较小,比表面积大,具有尖晶石型结构,有望成为高性能锂离子电池正极材料.Using MnSO4·H2O and LiOH ; H20 as raw materials,NaOH and KOH as solvents,spinel LiMn2O4 nanorods was prepared by composite-hydroxide-mediated method. The influenences of the differ- ent conditions were investigated. The technological conditions were： the mole ratio of lithium and manganese 1.1：2,reaction temperature 200 ℃ and reaction time 24 h. The surface and pore size analyzer,XRD, FT-IR and SEM were used to characterize the samples. The spinel LiMn2O4 obtained by composite-hydroxide-mediated method had smaller particle size and larger specific surface area. So it was hopeful to be the cathode material for high-energy lithium-ion battery.

关 键 词：混合碱法 尖晶石型LIMN2O4 纳米棒 

分 类 号：TG131.11[一般工业技术—材料科学与工程]