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Ultrathin NiCo2O4 nanosheets grown on three-dimensional interwoven nitrogen-doped carbon nanotubes as binder-free electrodes for high-performance supercapacitors
| Content Provider | Semantic Scholar |
|---|---|
| Author | Wu, Jian Liu, Xichuan Zhang, Hui Lau, Woon-Ming Liu, Lingling |
| Copyright Year | 2015 |
| Abstract | A novel three-dimensional (3D) Ni foam/N-CNT/NiCo2O4 nanosheet electrode was synthesized by combining a chemical vapor deposition method and a facile electrochemical deposition method followed by a calcination process. The N-CNTs entangle with each other and construct a 3D highly conductive network, creating a structure which offers a skeleton for homogeneous electrodeposition of thin NiCo2O4 nanosheets. By taking advantage of the one-dimensional (1D) N-CNTs, the two-dimensional (2D) ultrathin nanosheets and the 3D hybrid structure, the 3D Ni foam/N-CNT/NiCo2O4 nanosheet electrode exhibits superior supercapacitive performances with high specific capacitance (1472 F g−1 at 1 A g−1), remarkable rate capability and excellent cycling stability (less than 1% loss after 3000 cycles). The outstanding supercapacitive performance is attributed to the highly conductive 3D Ni foam/N-CNT substrates and the ultrathin morphology of the NiCo2O4 nanosheets. The former offer a strong skeleton for uniform electrodeposition, endure the volume change, and provide a good electrical conducting pathway for ion and electron transport; meanwhile the latter possess numerous active sites and a short diffusion path. Moreover, the synthesis strategy can be extended to the preparation of other 3D electrode materials for supercapacitors and other energy-storage devices. |
| Starting Page | 15331 |
| Ending Page | 15338 |
| Page Count | 8 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/C5TA02719E |
| Volume Number | 3 |
| Alternate Webpage(s) | http://pubs.rsc.org/EN/content/getauthorversionpdf/C5TA02719E |
| Alternate Webpage(s) | https://doi.org/10.1039/C5TA02719E |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
