【摘要】 利用十二烷基磺酸钠（SDS）作为表面活性剂,合成了形貌化的CoC2O4配合物前驱物,然后在500℃下热分解形貌化的前驱物,得到了多层多孔Co₃O₄纳米粒子组装体。采用FESEM、TEM、HRTEM、XRD、N₂吸附脱附和Raman散射等手段对产物进行了分析和表征。低角XRD,TEM和N₂吸附脱附测试表明所得组装体具有多孔结构。常规XRD、HRTEM和Raman结果证明组装体中Co3O4纳米粒子建筑块结晶较好。与体相Co₃O₄晶体相比,Co₃O₄纳米粒子组装体的5个拉曼活性峰发生了明显的红移。将Co₃O₄纳米粒子组装体作为锂离子电池的正极材料进行了电化学性能测试,结果表明该组装体电极的首次放电容量为1115mAh·g^-1,远高于目前文献报道的Co₃O₄纳米管、纳米粒子和纳米棒电极。但是,该组装体电极的循环性能不好,有待进一步提高。更多还原

【Abstract】 Multi-layered Co₃O₄ nanoparticle assemblies with well arranged Co₃O₄ nanoparticles have been fabricated through thermal conversion of micelle-assisted shaped precursor. Low angle diffraction data, TEM images and nitrogen-adsorption studies show that the obtained assemblies are porous. Wide angle XRD, HRTEM and Raman analysis results exhibit that the Co₃O₄ nanoparticle building blocks are well crystallized. Corresponding Raman spectrum of the assemblies shifts toward low wave number region compared with that for bulk crystalline Co₃O₄. Electrochemical measurement results demonstrate that the obtained Co₃O₄ nanoparticle assemblies can be served as a good cathode material for lithium secondary batteries. The initial discharge capacity of the electrode made from Co₃O₄ nanoparticle assemblies is 1 115 mAh·g^-1, which is much higher than that of the reported Co₃O₄ nanotubes, nanoparticles and nanorods electrodes. However, its cycling performance and stability are to be improved.更多还原