CAJ | 학술논문

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1 115 mAh·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.
이용십이완기광산납(SDS)작위표면활성제,합성료형모화적CoC2O4배합물전구물,연후재500 ℃하열분해형모화적전구물,득도료다층다공Co3O4납미입자조장체.채용FESEM、TEM、HRTEM、XRD、N2흡부탈부화Raman산사등수단대산물진행료분석화표정.저각XRD,TEM화N2흡부탈부측시표명소득조장체구유다공결구.상규XRD、HRTEM화Raman결과증명조장체중Co3O4납미입자건축괴결정교호.여체상Co3O4정체상비,Co3O4납미입자조장체적5개랍만활성봉발생료명현적홍이.장Co3O4납미입자조장체작위리리자전지적정겁재료진행료전화학성능측시,결과표명해조장체전겁적수차방전용량위1 115 mAh·g-1,원고우목전문헌보도적Co3O4납미관、납미입자화납미봉전겁.단시,해조장체전겁적순배성능불호.유대진일보제고.
Multi-layered Co3O4 nanoparticle assemblies with well arranged Co304 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.