期刊
NANOMATERIALS
卷 11, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/nano11010187
关键词
supercapacitor; nickel oxide; NiO; C nanocomposite; non-isothermal decomposition
类别
资金
- Government of Russia [14, Z50.31.0046]
- Russian Science Foundation [20-79-10063]
- Russian Science Foundation [20-79-10063] Funding Source: Russian Science Foundation
NiO/C nanocomposites were synthesized via a two-step method, exhibiting beta-NiO with spherical particles distributed on the carbon support surface. The average diameter of nickel oxide spheres increases with NiO content, while the specific capacitance reaches its maximum at 60 wt% NiO concentration before decreasing, showing excellent cycling stability properties. NiO/C composites with 60% NiO are promising materials for charging quartz clocks with a power rating of 1.5 V (30 min).
A series of NiO/C nanocomposites with NiO concentrations ranging from 10 to 90 wt% was synthesized using a simple and efficient two-step method based on non-isothermal decomposition of Nickel(II) bis(acetylacetonate). X-ray diffraction (XRD) measurements of these NiO/C nanocomposites demonstrate the presence of beta-NiO. NiO/C nanocomposites are composed of spherical particles distributed over the carbon support surface. The average diameter of nickel oxide spheres increases with the NiO content and are estimated as 36, 50 and 205 nm for nanocomposites with 10, 50 and 80 wt% NiO concentrations, respectively. In turn, each NiO sphere contains several nickel oxide nanoparticles, whose average sizes are 7-8 nm. According to the tests performed using a three-electrode cell, specific capacitance (SC) of NiO/C nanocomposites increases from 200 to 400 F/g as the NiO content achieves a maximum of 60 wt% concentration, after which the SC decreases. The study of the NiO/C composite showing the highest SC in three- and two-electrode cells reveals that its SC remains almost unchanged while increasing the current density, and the sample demonstrates excellent cycling stability properties. Finally, NiO/C (60% NiO) composites are shown to be promising materials for charging quartz clocks with a power rating of 1.5 V (30 min).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据