锰前驱体对锂离子电池正极材料LiMn_2O_4性能的影响(英文)  

Effects of Mn-Precursor on Performances of LiMn_2O_4 Cathode Material for Lithium Ion Battery

作　　者：刘大亮[1,2] 杜立成[1,2] 刘亚飞[1,2] 陈彦彬[1,2] 

机构地区：[1]北京矿冶研究总院,北京100160 [2]北京当升材料科技股份有限公司,北京100160

出　　处：《稀有金属材料与工程》2014年第11期2584-2587,共4页Rare Metal Materials and Engineering

基　　金：Science and Technology Project of Beijing(Z111103055311072);National Key New Product(2012GRA00066)

摘　　要：通过固相烧结工艺,制备了铝掺杂的Li Mn2O4锂离子电池正极材料。其中球型化及鳞块状的Li Mn2O4分别由Al共沉积的锰氧化物(CMO)前驱体及电解二氧化锰(EMD)前驱体制备。通过X射线衍射仪、扫描电子显微镜、电感耦合等离子光谱仪及方型铝壳全电池充放电测试等手段对试样的物化指标进行了测试。结果表明两组试样都为纯相,同时以CMO为前驱体制备的Li Mn2O4材料具备较好的球型度,更高的振实密度以及更优异的电化学性能。AI doped LiMn204 （LMO） cathode material for lithium ion battery was synthesized using two different Mn-precursors through solid-state sintering process. Spherical LMO was synthesized from Al-doped chemically-coprecipitated manganese oxide （CMO）, and flake-type LMO was prepared from electrolytic manganese dioxide （EMD）. To compare their difference, the samples were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, inductive coupled plasma emission spectrometer （ICP） and fabricated into prismatic battery to investigate their physical and electrochemical properties. The results show that no impurities phase exist in the products. The powder from CMO displays a good sphericity, a higher tap density, and better electrochemical properties.

关 键 词：LI MN2O4 化学共沉积 锰前驱体 正极材料 

分 类 号：TM912[电气工程—电力电子与电力传动]