High Specific Capacitance Electrode Material for Supercapacitors Based on Resin-Derived Nitrogen-Doped Porous Carbons

Abstract

Carbon-based materials, as electrodes for supercapacitors, have attracted tremendous attention. Therefore, nitrogen-doped porous carbons (NPCs) were prepared through a facile carbonization/activation strategy by treating different mass ratios of melamine–urea–formaldehyde resin and KOH. It is clearly demonstrated that because of the introduction of KOH, the resulting NPCs were shown to have increased specific surface area and a rich pore structure, and the best sample possessed a large specific surface area of 2248 m2 g–1 and high N content, which contributed to the good electrochemical performance for supercapacitors. Accordingly, a three-electrode system assembles NPCs as an electrode using aqueous KOH solution; the specific capacitance was 341 F g–1 under the current density of 1 A g–1 and retained a specific capacitance of almost 92% after 5000 cycles. The maximum energy output for a symmetrical solid-state supercapacitor with NPCs as the electrode material was 9.60 W h kg–1 at 1 A g–1. NPCs have promising applications on high-performance supercapacitors and other energy-storage devices.

Design of Ultra‐Microporous Carbons by Interpenetrating MF Prepolymer into PAAS Networks at Molecule Level for Enhanced Electrochemical Performance

“…The results show that the electrode has favorable kinetics and high power capacitance performance in the KOH electrolyte. The energy density and power density of the device is summarized in the Ragone plot of Figure f, which shows a high energy density of 17.13 Wh kg −1 at the power density of 900 W kg −1 , and much higher than other previously reported materials such as ANCLCNFs, NFMCNFs, C‐blank, Z‐HPAC, CLCNF/PANi, HGPC‐A, N,S‐GLC, NPCs and other carbon materials related symmetrical devices . In contrast, the energy density of the device in KOH solution is only 7.15 Wh kg‐1, which is less than half that in Na 2 SO 4 solution, and smaller in H 2 SO 4.…”

“… The devices: (a) CV curves in 6 M KOH, (b) CV curves in 1 M Na 2 SO 4 , (c) CV curves in 1 M H 2 SO 4 , (d) electrochemical impedance spectroscopy, (e) bode plots (inset is the time constants, τ) in different electrolytes, and (f) Ragone plot in different electrolytes and the comparison with other reported works ANCLCNFs, NFMCNFs, C‐blank, Z‐HPAC, CLCNF/PANi, HGPC‐A N,S‐GLC, NPCs …”

“…ANCLCNFs, [35] NFMCNFs, [36] C-blank, [37] Z-HPAC, [38] CLCNF/PANi, [39] HGPC-A [40] N,S-GLC, [41] NPCs. [42]…”

Electrochemical Performance of Aluminum Doped Ni1−xAlxCo2O4 Hierarchical Nanostructure: Experimental and Theoretical Study

“…The third is a fast potential decay which is created by electric double layer capacitance [74]. The specific capacitance values for electrodes of Ni 1−x Al x Co 2 O 4 were calculated by using Equation ( 4) [75].…”

Sustainable Materials from Fish Industry Waste for Electrochemical Energy Systems

“…The energy crisis, climate change, increased energy consumption and growing awareness of environmental protection needs have imposed the challenge of sustainable development, pushing industrial and academic research toward efficient, clean, ecological and high-performance materials and equipment for energy storage and conversion [1]. The energy produced by renewable resources needs to be stored by electrochemical energy storage devices from which it can be extracted at a later time to perform necessary tasks [2].…”