期刊
ENERGY & FUELS
卷 35, 期 2, 页码 1796-1809出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.energyfuels.0c03545
关键词
-
资金
- National Research Foundation of Korea [NRF-2019R1A5A8080290]
By modifying two advanced carbon nanostructures with carboxyl functional groups and binding them with TiO2 nanospheres, the performance of carbon-based supercapacitors has been improved. The surface-functionalized hybrid electrodes showed superior specific capacitance and stability, making them suitable for high-performance supercapacitor applications.
To meet the demand for the development of high energy storage devices, appropriate designs of advanced carbon nanostructures (CNs) with metal oxides are highly preferred. Herein, the surfaces of two advanced carbon nanostructures (CNs), g-C3N4 and carbon nanofibers, were modified by the addition of carboxyl functional groups and then bound to TiO2 nanospheres (TNS). The surface functionalization of CNs is an efficient approach for improving the performance of carbon-based supercapacitors by solving the dispersion problems. Field emission scanning electron microscopy and transmission electron microscopy images demonstrated the sheet, fiber, and sphere morphologies of g-C3N4 , carbon, and TiO2, respectively. According to the results of Fourier transform infrared spectroscopy, the carboxyl functional groups with CNs were confirmed. In a three-electrode system, the supercapacitance of fictitious electrodes was evaluated with a 4 M KOH electrolyte. The surface-functionalized hybrid electrode showed a specific capacitance (817 F g(-1)) at a current density of 0.25 A g(-1) superior to those of the other fictitious electrodes. The electrode showed stability for up to 2000 cycles, with 89.2% capacitance retention. The superior electrochemical properties of CNs-TNS were attributed to the synergetic effects of g-C3N4-CNF/TiO(2 )composition and its excellent accessibility, conductivity, surface functionalization, and strong chemical interface. This study positively encourages the manufacture and design of carbon nanostructure based metal oxide nanostructures for high-performance supercapacitor applications.
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