Facile synthesis of nitrogen-doped hierarchical porous lamellar carbon for high-performance supercapacitors

Abstract

Three-dimensional interconnected N-enriched hierarchical porous lamellar carbon with a multilevel pore structure has been fabricated using waste nitrogen-containing mantis shrimp shell as a carbon precursor and KOH as an impregnation solution.

High Energy Density Heteroatom (O, N and S) Enriched Activated Carbon for Rational Design of Symmetric Supercapacitors

“…Figures 5 b(i–iii) and S4a(ii) show high‐resolution O 1s spectra with two core peaks at ∼532 and ∼533.5 eV assigned to the O−C and O−N bonds, respectively [25] . Moreover, in Figures 5 c(i–iii) and S4a(iii), the N 1s peak can be deconvoluted, with the peaks at ∼398.5, ∼400, and ∼401.4 eV being attributed to pyridinic, pyrrolic, and quaternary N atoms, respectively [20, 26] . The S 2p spectrum in Figures 5 d(i–iii) and S4 a(iv) can be fitted with two peaks.…”

“…The absorption peak at around 1580 cm −1 is attributed to the formation of N−H in‐plane deformation bond [19] . The peak at 1380 cm −1 is identified as the C−N vibration modes [20] . The peak at 1210 cm −1 corresponds to the characteristic stretching vibrations of C−N bonds.…”

Oxygen-enriched surface modification for improving the dispersion of iron oxide on a porous carbon surface and its application as carbon molecular sieves (CMS) for CO2/CH4 separation

“…The peak of 3440 cm À1 represents the presence of a hydroxyl group (O-H stretching). 27 Meanwhile, the peak of 1580 cm À1 and 1130 cm À1 denote the presence of a carboxyl group (C]O stretching) [27][28][29][30] and C-O group (stretching), respectively. 29 It is remarkable that there is an increase in the intensity of the O-H stretching, C]O stretching, and C-H stretching when compared to pristine carbon.…”

Waste Biomass Based‐Activated Carbons Derived from Soybean Pods as Electrode Materials for High‐Performance Supercapacitors

“…On the other hand, using biomasses to prepare activated carbons has recently become a popular trend in preparation of electrode materials for supercapacitors from the eco‐friendly and reproductive points of view. All sorts of waste biomasses, such as stems, leaves, and shells of agricultural crops, shells, feathers and gills of animals, and so on, have been used to prepare electrode materials for supercapacitors over the past years (Table S1) . Most of them have showed comparable even superior electrochemical performance to the commercial activated carbon.…”