| Morphology-controllable synthesis of cobalt oxalates and their conversion to mesoporous Co3O4 nanostructures for application in supercapacitors | |
| Department | 固体润滑国家重点实验室 ; 先进润滑与防护材料研究发展中心 |
Wang DW(汪德伟); Wang QH(王齐华) ; Wang TM(王廷梅)
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| 2011 | |
| Source Publication | Inorganic Chemistry
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| ISSN | 0020-1669 |
| Volume | 50Pages:6482-6492 |
| Abstract | 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. |
| Subject Area | 材料科学与物理化学 |
| Funding Organization | 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) |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 聚合物自润滑复合材料组 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.licp.cn/handle/362003/3242 |
| Collection | 固体润滑国家重点实验室（LSL） 中国科学院材料磨损与防护重点实验室/先进润滑与防护材料研究发展中心 |
| Corresponding Author | Wang QH(王齐华) |
| Recommended Citation GB/T 7714 | Wang DW,Wang QH,Wang TM. 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 | 汪德伟,王齐华,&王廷梅.(2011).Morphology-controllable synthesis of cobalt oxalates and their conversion to mesoporous Co3O4 nanostructures for application in supercapacitors.Inorganic Chemistry,50,6482-6492. |
| MLA | 汪德伟,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. |
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