Morphology-controllable synthesis of cobalt oxalates and their conversion to mesoporous Co3O4 nanostructures for application in supercapacitors

CORC > 兰州化学物理研究所 > 中国科学院兰州化学物理研究所 > 固体润滑国家重点实验室

	Morphology-controllable synthesis of cobalt oxalates and their conversion to mesoporous Co3O4 nanostructures for application in supercapacitors
	Wang QH(王齐华); Wang TM(王廷梅); Wang QH(王齐华)
刊名	Inorganic Chemistry
	2011
卷号	50 页码:6482-6492
ISSN号	0020-1669
通讯作者	王齐华
中文摘要	In this work, one-dimensional and layered parallel folding of cobalt oxalate nanostructures have been selectively prepared by a one-step, template-free, water-controlled precipitation approach by simply altering the solvents used at ambient temperature and pressure. Encouragingly, the feeding order of solutions played an extraordinary role in the synthesis of nanorods and nanowires. After calcination in air, the as-prepared cobalt oxalate nanostructures were converted to mesoporous Co3O4 nanostructures while their original frame structures were wellmaintained. The phase composition,morphology, and structure of the as- obtained products were studied in detail. Electrochemical properties of the Co3O4 electrodes were carried out using cyclic voltammetry (CV) and galvanostatic charge discharge measurements by a three-electrode system. The electrochemical experiments revealed that the layered parallel folding structure of mesoporous Co3O4 exhibited higher capacitance compared to that of the nanorods and nanowires. A maximum speciﬁc capacitance of 202.5 F g 1 has been obtained in 2 M KOH aqueous electrolyte at a current density of 1 A g 1 with a voltage window from 0 to 0.40 V. Furthermore, the speciﬁc capacitance decay after 1000 continuous charge discharge cycles was negligible, revealing the excellent stability of the electrode. These characteristics indicate that the mesoporous Co3O4 nanostructures are promising electrode materials for supercapacitors.
学科主题	材料科学与物理化学
收录类别	SCI
资助信息	the National Science Foundation for Distinguished Young Scholars of China (Grant NO.51025517);the Innovative Group Foundation of NSFC (Grant NO.50721062);the National 973 project of China (2007CB607606)
语种	英语
WOS记录号	WOS:000292618000012
公开日期	2013-06-27
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/3242]
专题	兰州化学物理研究所_固体润滑国家重点实验室兰州化学物理研究所_先进润滑与防护材料研究发展中心
通讯作者	Wang QH(王齐华); Wang QH(王齐华)
推荐引用方式 GB/T 7714	Wang QH,Wang TM,Wang QH. Morphology-controllable synthesis of cobalt oxalates and their conversion to mesoporous Co3O4 nanostructures for application in supercapacitors[J]. Inorganic Chemistry,2011,50:6482-6492.
APA	王齐华,王廷梅,&王齐华.(2011).Morphology-controllable synthesis of cobalt oxalates and their conversion to mesoporous Co3O4 nanostructures for application in supercapacitors.Inorganic Chemistry,50,6482-6492.
MLA	王齐华,et al."Morphology-controllable synthesis of cobalt oxalates and their conversion to mesoporous Co3O4 nanostructures for application in supercapacitors".Inorganic Chemistry 50(2011):6482-6492.