Synthesis of Mesoporous ZIF‐8 Nanoribbons and their Conversion into Carbon Nanoribbons for High‐Performance Supercapacitors

Abstract

ZIF-8 nanoribbons, with tunable morphology and pore structure, were synthesized by using the tri-block co-polymer Pluronic F127 as a soft template. The as-synthesized ZIF-8 nanoribbons were converted into carbon nanoribbons by thermal transformation with largely preserved morphology and porosity. The resulting carbon nanoribbons feature both micro- and meso-pores with high surface areas of over 1000 m g . In addition, nitrogen-doping in the carbon nanoribbons was achieved, as confirmed by XPS and EELS measurements. The hybrid carbon nanoribbons provide pseudo-capacitance that promotes electrochemical performance, rendering a high specific capacitance of up to 297 F g at a current density of 0.5 A g in a three-electrode system. A long cycle life was also demonstrated by recording a 90.26 % preservation of capacitance after 10 000 cycles of charge-discharge at a current density of 4.0 A g . Furthermore, a symmetrical supercapacitor is fabricated by employing the carbon nanoribbons, which shows good electrochemical performance with respect to energy, power and cycle life.

Dual-Template Construction of Iron–Nitrogen-Codoped Hierarchically Porous Carbon Electrocatalyst for Oxygen Reduction Reaction

“…Also, in the FITR spectrum of SiO 2 @MIL-101­(Fe)/ZIF-8, apart from the typical peaks of SiO 2 and MIL-101­(Fe), the adsorption peaks of ZIF-8 can be observed as well, demonstrating the mixture precursor. The in-plane bending and stretching of the organic compound could be observed at 900–1350 and 1350–1500 cm –1 . , Furthermore, the crystal structure of the as-synthesized electrocatalysts are shown in Figure d. The diffraction peaks at about 37.9, 42.8, 43.3, 44.9, 46.0, and 49.2° were indexed to Fe 3 C (PDF# 89-2867).…”

“…The in-plane bending and stretching of the organic compound could be observed at 900−1350 and 1350−1500 cm −1 . 29,30 Furthermore, the crystal structure of the as-synthesized electrocatalysts are shown in Figure 1d. The diffraction peaks at about 37.9, 42.8, 43.3, 44.9, 46.0, and 49.2°were indexed to Fe 3 C (PDF# 89-2867).…”

Al-MOF-derived spindle-like hierarchical porous activated carbon for advanced supercapacitors

“…For example, at 50 A g −1 , there is only about 5% decline after 100 000 cycles in the charge-discharge tests. 29 In addition, as compared with the other porous carbon materials obtained from diverse MOFs, [30][31][32][33][34][35][36][37] SPC shows far superior capacitance retention to others in a long cycling test as shown in Fig. 6d.…”

Microporous Organic Polymer‐Derived Nitrogen‐Doped Porous Carbon Spheres for Efficient Capacitive Energy Storage

“…Porous organic polymers are a class of organic materials consisting of organic building blocks covalently linked into a highly ordered and porous framework . Recently, numerous POPs such as hypercrosslinked polymers (HCPs), covalent organic frameworks (COFs), metal‐organic frameworks (MOFs), microporous organic polymers (MOPs), etc. have been explored as active materials for various applications such as gas adsorption, water purification, catalysis and energy applications.…”