Enhanced supercapacitance of vertically aligned multi-wall carbon nanotube array covered by MoS₂ nanoparticles

详细信息    查看全文

• 作者：V. O. Koroteev ; I. V. Kuznetsova ; A. G. Kurenya ; M. A. Kanygin ; E. O. Fedorovskaya ; Y. L. Mikhlin ; A. L. Chuvilin ; L. G. Bulusheva and A. V. Okotrub
• 刊名：physica status solidi (b)
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：253
• 期：12
• 页码：2451-2456
• 全文大小：1216K
• ISSN：1521-3951

文摘

Vertically aligned multi-wall carbon nanotube (VA-MWCNT) arrays have been used for deposition of molybdenum sulphide from a water solution of ammonia molybdate and thiourea. A hydrothermal synthesis at 175 °C resulted in formation of quasi-spherical nanoparticles inside and on the top surface of arrays without destruction of the array structure. X-ray photoelectron spectroscopy revealed a molybdenum disulfide (MoS₂) composition of the nanoparticles, while Raman spectroscopy detected the bands characteristic of light scattering in the MoS₂ crystallites only after a treatment of synthesis products in hydrogen flow. As compared to the initial VA-MWCNTs, the composites showed enhanced specific capacitances in 1M H₂SO₄ electrolyte especially at low scan rates due to redox reactions involving MoS₂. The reactions were more pronounced for the hydrogen treated composite.