Hierarchical Porous Carbon Materials Prepared by Direct Carbonization of Metal–Organic Frameworks as an Electrode Material for Supercapacitors

Abstract

We report the synthesis and characterization of hierarchical porous carbons (HPCs) prepared by direct carbonization of zinc-based metal-organic frameworks (MOFs), and their electrochemical performance as an electrode material for supercapacitors. All the HPCs showed high porosity (Brunauer-Emmett-Teller (BET) surface areas 1000-1820 m 2 /g) with micro-, meso-, and macropores. The HPC-based electrodes exhibited a high-specific capacitance in the range of 164-203 F/g (scan rate: 10 mV/s), which suggests that these porous carbons may be useful for fabricating supercapacitors. Among the HPCs, HPC-4 with the largest surface area as well as with~1% nitrogen content exhibited the highest specific capacitance, which is comparable with those of other reported carbon materials. This work suggests that the hierarchical porosity and nitrogen doping in HPCs may enhance their conductivity and specific capacitance.

Effect of Functional Groups on the I2 Sorption Kinetics of Isostructural Metal–Organic Frameworks

“…Metal-organic frameworks (MOFs) are promising adsorbents for I 2 capture because of their large surface areas and easy structural tunability. [6][7][8][9][10][11] Various MOFs such as HKUST-1, 12 ZIF-8, [13][14][15][16] UiO-66 series, 17 MIL series, 18 MFM-300 series, 19 Tb-MOF, 20 and SBMOF 21 have been evaluated for I 2 capture. To design an ideal MOF sorbent, the interactions of the adsorbed I 2 molecules with the building blocks of MOFs must be enhanced.…”

Heterojunction of Pores in Granola‐Type Crystals of Two Different Metal–Organic Frameworks for Enhanced Formaldehyde Removal

“…In previous studies, MOFs were combined with different organic/inorganic nanoparticles to obtain heterogeneous structures (20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30), but these studies focus on combining MOFs with other class of functional materials. Different pores of MOFs have been previously incorporated by impregnating either different organic linkers or metal oxide units (31)(32)(33)(34)(35), defects (12,36,37), and meso/macropores (38,39), as well as by coating MOFs with other MOFs (40)(41)(42).…”

Rational Design of Metal–Organic Framework‐Based Materials for Advanced LiS Batteries

“…[21][22][23] Moreover, MOFs are utilized as a sacrificial-template for a wide range of nano-and microstructures with compositional and structural divergence. [24][25][26][27][28][29] The versatility of MOF-based materials, as reflected by MOFs, MOF-derived hybrids (MDHs), MOF-derived carbons (MDCs), enables MOF-based materials to serve a design platform for fabricating cathodes and separators with desirable properties that address the aforementioned issues of Li S batteries. 30,31 Here, we provide a new insights into the design of MOF-based materials for Li S batteries by categorizing the literature with respect to material function, rather than by material synthesis or cell components as done in several other reviews.…”