کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1523881 | 1511829 | 2011 | 4 صفحه PDF | دانلود رایگان |

It is the first report that the uniformly dispersed nickel oxide nanoparticles were synthesized on the substrates of multi-walled carbon nanotubes (MWNT) via electrochemical technique. The morphology and chemical state of the NiOx/MWNT composite were characterized using scanning electron microscopy and X-ray photoelectron spectroscopy. The electrochemical test results revealed that the surface-decorated composite with oxide particle sizes of 15–30 nm can deliver specific capacitance about 190 F g−1, ten-fold greater than that of pure MWNT. Meanwhile, the electrode displayed excellent cycling stability with nearly 100% coulombic efficiency over 1000 cycles and good rate capability with acceptable specific capacitance fading, indicating that this novel nanostructured composite electrode was a promising candidate for electrochemical capacitors.
► Nickel oxide nanoparticles were electrochemically dispersed on the exterior of MWNT.
► These nanoparticles enhance the specific capacitance of electrodes more than ten-fold.
► Nickel oxide particles dispersed reach specific capacitance ∼1250 F g−1.
► The composite electrodes exhibit excellent rate capability and cyclability.
Journal: Materials Chemistry and Physics - Volume 131, Issues 1–2, 15 December 2011, Pages 8–11