A sustainable one-step strategy for highly graphitized capacitive carbons with hierarchical micro–meso–macro porosity

Abstract

Large micropore surface area, superior electrical conductivity and suitable pore size are simultaneously desired characteristics for high-performance capacitive carbons. However, these desired features tend to be mutually competing, and are...

Hierarchically Nanoporous Carbon for CO2 Capture and Separation: Roles of Morphology, Porosity, and Surface Chemistry

“…As presented in Figure b–d, all the as-obtained materials show the typical characteristic of an amorphous carbon structure with two broad diffraction peaks at ca. 21 and 43°, which, respectively, correspond to the (002) and (100) planes . Notably, the (002) diffraction peaks of NHPC- z samples gradually shift to a higher degree from 21.3° of NHPC-0.5 to 25.4° of NHPC-2.0 (Figure d), which should be related to their morphology and structure, reflecting the generation of high densely packed sheet structures …”

“…21 and 43°, which, respectively, correspond to the (002) and (100) planes. 30 Notably, the (002) diffraction peaks of NHPC-z samples gradually shift to a higher degree from 21.3°of NHPC-0.5 to 25.4°of NHPC-2.0 (Figure 2d), which should be related to their morphology and structure, reflecting the generation of high densely packed sheet structures. 31 The graphitization degree or structural defects of the carbon skeleton were further analyzed by Raman spectroscopy (Figure 2e,f).…”

Iron carbide nanoparticles supported on an N-doped carbon porous framework as a bifunctional material for electrocatalytic oxygen reduction and supercapacitors

“…This offers extensive electrochemical active sites with a highly accessible surface area for more electrolyte ions to store, thus the best capacitive performance is achieved. 53 Therefore, the porous structure of Fe 3 C/PNCF results in the largest specific capacitance during the process of charge/discharge. On the basis of the above results, Fig.…”

High performance supercapacitors based on wood-derived thick carbon electrodes synthesized via green activation process

“…In addition, the conductivity and ion mobility of 6 M KOH and 1 M H 2 SO 4 electrolytes were much higher than those of the 1 M Na 2 SO 4 electrolyte. 61,62 The fitted R ct of the KOH/H 2 SO 4 / Na 2 SO 4 -based devices was 0.92, 1.82, and 6.27 Ω, respectively (Fig. S11h †).…”