Department of Chemistry and Forensic Science, University of Technology Sydney, Sydney, NSW 2007, Australia.
Chemistry. 2010 Sep 24;16(36):11020-7. doi: 10.1002/chem.201000562.
Highly ordered mesoporous Co(3)O(4) nanostructures were prepared using KIT-6 and SBA-15 silica as hard templates. The structures were confirmed by small angle X-ray diffraction, high resolution transmission electron microscopy, and N(2) adsorption-desorption isotherm analysis. Both KIT-6 cubic and SBA-15 hexagonal mesoporous Co(3)O(4) samples exhibited a low Néel temperature and bulk antiferromagnetic coupling due to geometric confinement of antiferromagnetic order within the nanoparticles. Mesoporous Co(3)O(4) electrode materials have demonstrated the high lithium storage capacity of more than 1200 mAh g(-1) with an excellent cycle life. They also exhibited a high specific capacitance of 370 F g(-1) as electrodes in supercapacitors.
采用 KIT-6 和 SBA-15 硅为硬模板制备了高度有序的介孔 Co(3)O(4)纳米结构。通过小角 X 射线衍射、高分辨率透射电子显微镜和 N(2)吸附-脱附等温线分析对结构进行了确认。KIT-6 立方和 SBA-15 六方介孔 Co(3)O(4)样品都表现出低奈尔温度和体相反铁磁耦合，这是由于反铁磁有序在纳米颗粒内的几何限制。介孔 Co(3)O(4)电极材料表现出超过 1200 mAh g(-1)的高储锂容量和优异的循环寿命。它们还作为超级电容器的电极表现出 370 F g(-1)的高比电容。
