Three-dimensional hierarchical self-supported NiCo2O4/carbon nanotube core-shell networks as high performance supercapacitor electrodes | |
Department | 清洁能源化学与材料实验室 |
Li XC(李小成)1; Sun, Wei1,2; Wang, Liqun1,3; Qi, Yongdong1,2; Guo, Tieming3; Zhao, Xinhong2; Yan XB(阎兴斌)1; Li XC(李小成) | |
2015 | |
Source Publication | RSC Advances |
ISSN | 2046-2069 |
Volume | 5Issue:11Pages:7976-7985 |
Abstract | A three-dimensional (3D) hierarchical self-supported NiCo2O4/carbon nanotubes/nickel foam (NiCo2O4/CNT/NF) electrode has been developed by electrodepositing NiCo layered double hydroxides (LDHs) on a self-supported CNT layer grown on a macroporous NF substrate followed by a simple post-annealing process. The resulting 3D hierarchical self-supported NiCo2O4/CNT/NF electrode delivered high specific capacitances of 1533 F g−1 and 1335 F g−1 at current densities of 3 A g−1 and 30 A g−1, respectively, vastly superior to those of a NiCo2O4/NF electrode at the same current density. The NiCo2O4/CNT/NF electrode also had good cycling stability and showed 102% initial capacitance retention after 2500 cycles at progressively varying current densities. The performance of the NiCo2O4/CNT/NF electrode was further evaluated by a two-electrode asymmetric supercapacitor device. The asymmetric device delivered a high energy density of 48.3 W h kg−1 at a power density of 799.9 W kg−1 and still maintained an energy density of 17.1 W h kg−1 as the power density increased up to 7995 W kg−1. Remarkably, the asymmetric device also exhibited good cycling stability with capacitance retention of 78.9% after 2000 cycles at a current density of 2 A g−1, indicating promising applications in supercapacitors. The results of this study also provide an alternative strategy for constructing high performance supercapacitor electrodes with high specific capacitance, good rate capability and cycling stability. |
Subject Area | 材料科学与物理化学 |
DOI | 10.1039/c4ra09048a |
Funding Organization | the National Natural Science Foundation of China (Grant no. 21306072) |
Indexed By | SCI |
If | 3.289 |
Language | 英语 |
Funding Project | 柔性有机太阳能电池研究组;低维材料与化学储能课题组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/19312 |
Collection | 清洁能源化学与材料实验室 |
Corresponding Author | Li XC(李小成) |
Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, Lab Clean Energy Chem & Mat, Lanzhou 730000, Peoples R China 2.Lanzhou Univ Technol, Sch Petrochem Engn, Lanzhou 730050, Peoples R China 3.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Mat, Lanzhou 730050, Peoples R China |
Recommended Citation GB/T 7714 | Li XC,Sun, Wei,Wang, Liqun,et al. Three-dimensional hierarchical self-supported NiCo2O4/carbon nanotube core-shell networks as high performance supercapacitor electrodes[J]. RSC Advances,2015,5(11):7976-7985. |
APA | Li XC.,Sun, Wei.,Wang, Liqun.,Qi, Yongdong.,Guo, Tieming.,...&李小成.(2015).Three-dimensional hierarchical self-supported NiCo2O4/carbon nanotube core-shell networks as high performance supercapacitor electrodes.RSC Advances,5(11),7976-7985. |
MLA | Li XC,et al."Three-dimensional hierarchical self-supported NiCo2O4/carbon nanotube core-shell networks as high performance supercapacitor electrodes".RSC Advances 5.11(2015):7976-7985. |
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