Abstract
The electrochemical property of ordered mesoporous carbon (OMC) can be changed significantly due to the incorporating of electron-donating heteroatoms into OMC. Here, we demonstrate the successful fabrication of nitrogen-doped ordered mesoporous carbon (NOMC) materials to be used as carbon substrates for loading polyaniline (PANI) by in situ polymerization. Compared with NOMC, the PANI/NOMC prepared with a different mass ratio of PANI and NOMC exhibits remarkably higher electrochemical specific capacitance. In a typical three-electrode configuration, the hybrid has a specific capacitance about 276.1 F/g at 0.2 A/g with a specific energy density about 38.4 Wh/kg. What is more, the energy density decreases very slowly with power density increasing, which is a different phenomenon from other reports. PANI/NOMC materials exhibit good rate performance and long cycle stability in alkaline electrolyte (~ 80% after 5000 cycles). The fabrication of PANI/NOMC with enhanced electrochemical properties provides a feasible route for promoting its applications in supercapacitors.
Highlights
With the aggravation of environmental pollution and resource shortage, the development and application of novel clean energy and energy storage become an urgent problem to be solved
Resol and cyanamide were injected into SBA-15, and the hybrids were carbonized at 800 °C, and the hybrids were added into the HF aqueous solution (10 wt%) to remove the templet to obtain the PANI/nitrogen-doped ordered mesoporous carbon (NOMC)-x
Scanning electron microscope (SEM) images of a typical sample of NOMC (Fig. 1b, c) and PANI/ NOMC-0.5 (Fig. 1e, f ) reveal that NOMC and PANI/ NOMC-0.5 consist of many cylindrical particles with uniform sizes of 1 μm
Summary
With the aggravation of environmental pollution and resource shortage, the development and application of novel clean energy and energy storage become an urgent problem to be solved. As a new type of energy storage, the supercapacitor has attracted wide attention because of its fast charge and discharge rate, high power density, long cycle life, and non-pollution [1,2,3]. Compared with traditional energy storage devices such as lithium-ion batteries, the low energy density of supercapacitor makes its application subject to many limitations [4,5,6]. The electrode materials are the most important factor affecting the performance of supercapacitor. The research for a new high-performance electrode material has become a hotspot in the field of supercapacitor.
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