High performance supercapacitor electrodes based on B/N Co-doped biomass porous carbon materials by KOH activation and hydrothermal treatment

Preparation of N/O co-doped porous carbon by a one-step activation method for supercapacitor electrode materials

“…8a) and a Faraday hump was clearly observed over the range of 0.4-1.2 V to provide partial pseudocapacitance due to the nitrogen doping. 44 Notably, even at a scan rate of 200 mV s À1 , the CV curves retained almost their initial form, suggesting the excellent capacitive conductivity and rate performance of the EDLC. 45,46 Furthermore, a symmetric triangular shape was observed in the GCD curves of the EK-2-based supercapacitor at various GCDs from 0.5-10 A g À1 (Fig.…”

Three‐Dimensional Porous Carbon Materials from Coix lacryma‐jobi L. Shells for High‐Performance Supercapacitor

“…[41] (3) Because nitrogen-containing groups can improve the wettability of electrode material, and boost the ions transmission, further the electrochemical performance can be optimized. [42] The electrochemical impedance spectroscopy (EIS) data were analyzed with the Nyquist diagram. It exhibits relationship between the real component (Z') and imaginary component (Z'') of the impedance, reflecting the characteristic frequency response and the ion transfer process.…”

“…(2) Nitrogen‐containing groups increase the conductivity of the material and generate additional pseudocapacitance [41] . (3) Because nitrogen‐containing groups can improve the wettability of electrode material, and boost the ions transmission, further the electrochemical performance can be optimized [42] …”

Preparation of N/O-codoped quinoline pitch-based porous carbons for high-quality supercapacitor electrodes

“…3,5,[7][8][9][10] Porous carbons are deemed as a promising electrode material owing to their ultrahigh surface area, well-developed nanopore structure as well as the inherent advantages of carbon materials themselves, such as outstanding thermal and chemical inertness, good electrical conductivity and being rich in sources. 11,12 To date, the reported methods of preparing porous carbons mainly include traditional physical and chemical activation methods, 13,14 hard and soft templating approaches 15,16 and their combination methods, 17 besides some special methods, like molten salt carbonization, 18 sol-gel synthesis, 19 hydrothermal preparation, 20 self-assembly, 21 and explosion-assisted strategies. 22 Importantly, it has gradually been recognized that the various sizes of pores in porous carbon have different functions.…”

“…26 On the other hand, doping of active heteroatoms (N, O, S, P and B) is also thought to be an effective way to improve the electrochemical performance of porous carbons, as it can not only provide additional pseudo-capacitance via faradaic reactions, but also raise the conductivity of the carbon skeleton and the wettability of the carbon surface. 14,19,27 At present, codoping is gaining huge attention considering the synergistic effect of distinct heteroatoms, where doping N/O is viewed as the most exciting strategy to boost the capacity performance of porous carbon. [28][29][30][31] N and O heteroatoms on the surface of porous carbon mainly exist in the form of -NH 2 , -NO 2 , -CONH 2 and -OH, -CHO, -COOH, respectively, which are easily introduced by its post-treatment.…”