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由高温焙烧法制备层状前驱体 Nax[Li1 /6 Mn5/6 ]O2 ,再经离子交换反应得到 O2结构层状产物Liy[Li1 /6 Mn5/6 ]O2 。采用离子交换和元素分析推测前驱体中 Li+ 位于层板上。 XRD测试结果表明 ,Liy[Li1 /6 Mn5/6 ]O2 属六方晶系 ,P3 ml空间群 ;激光粒度分析仪测定 Na0 .0 6 Li0 .6 5[Li0 .1 0 Mn0 .88]O2 的最可几粒径为 2 .88μm;BET法测定其比表面积为 4.68m2 / g;TEM显示其形貌为存在缺陷的层状六方结构。XRD和元素分析结果表明 ,反应物 n(Na) / n(Mn)比直接影响着前驱体及最终产物的晶体结构和化学组成。
Layered precursor Nax [Li1 / 6 Mn5 / 6] O2 was prepared by calcination at high temperature, and then Li2 [Li1 / 6 Mn5 / 6] O2 was obtained by ion exchange reaction. Ion exchange and elemental analysis suggest that Li + in the precursor is on the plate. XRD results show that Liy [Li1 / 6 Mn5 / 6] O2 belongs to the hexagonal system with P3 ml space group; the laser particle size analyzer is the most suitable for the determination of Na0.6 Li0.65 [Li0.1O Mn0.88] O2 The particle size of the particles can be 2.88μm. The BET surface area is 4.68m2 / g. TEM shows that the morphology is a flawed layered hexagonal structure. The results of XRD and elemental analysis show that the n (Na) / n (Mn) ratio of the reactants directly affects the crystal structure and chemical composition of the precursor and the final product.