Heteroatom‐Containing Porous Carbons Derived from Ionic Liquid‐Doped Alkali Organic Salts for Supercapacitors

Abstract

A simple strategy for the synthesis of heteroatom-doped porous carbon materials (CMs) via using ionic liquid (IL)-doped alkali organic salts as small molecular precursors is developed. Doping of alkali organic salts (such as sodium glutamate, sodium tartrate, and sodium citrate) with heteroatoms containing ILs (including 1-butyl-3-methylimidazolium chlorine and 3-butyl-4-methythiazolebromination) not only incorporates the heteroatoms into the carbon frameworks but also highly improves the carbonization yield, as compared with that of either alkali organic salts or ILs as precursors. The porous structure of CMs can be tuned by adjusting the feed ratio of ILs. The porous CMs derived from 1-butyl-3-methylimidazolium chlorine-doped sodium glutamate exhibit high charge storage capacity with a specific capacitance of 287 F g(-1) and good stability over 5000 cycles in 6 m KOH at a current density of 1 A g(-1) for supercapacitors. This strategy opens a simple and efficient method for the synthesis of heteroatom-doped porous CMs.

In situ self‐template synthesis of cobalt/nitrogen‐doped nanocarbons with controllable shapes for oxygen reduction reaction and supercapacitors

“…Moreover, the presence of a transitional metal oxide can also increase the faradaic pseudocapacitance. Rational design and preparation methods for desired electrode materials with suitable surface areas and porous structures are needed, and Co/N co‐doped carbon materials offer distinct advantages for supercapacitors …”

“…Rational design and preparation methods for desired electrode materials with suitable surface areas and porous structures are needed, and Co/N co-doped carbon materials offer distinct advantages for supercapacitors. 21,22 Recently, two common optimization strategies for the synthesis of Co/N co-doped carbon materials have been developed. One is the template method, whereby N-doped materials with a certain structure are prepared as carbon precursors and Co species grow on the template to prepare the composite particles.…”

Nitrogen‐Doped Graphitic Porous Carbon Nanosheets Derived from In Situ Formed g‐C3N4 Templates for the Oxygen Reduction Reaction

“…[4a, f, 6b, 7] However,o wing to the sublimation of the precursors at high temperatures, the N-doping level in the resultant carbon materials is usuallyl ow. [8] To improvet he porosity and surface area of such carbon materials, the use of templates (e.g.,s ilica, [4p] ice, [4o] polyaniline [9] )a nd pore-forminga gents( NH 4 Cl [10] and NaHCO 3 [11] )w as recently developed. Graphitic carbon nitride (g-C 3 N 4 )i saquasi-two-dimensional organic nonmetallic semiconductor (see the Supporting Information).…”

Metal‐containing Ionic Liquid/Polyacrylonitrile‐derived Carbon Nanofibers for Oxygen Reduction Reaction and Flexible Zn–Air Battery

“…and metallic species, is commonly used to introduce active sites into carbon materials to improve practical performance . In nature, ionic liquids (ILs), a type of easily available and heteroatom‐rich materials, could act as a type of ideal dopants . First, ILs possess negligible vapour pressure which can reduce sublimation and volatile char formation in the pyrolysis process, and then realize the control of process and morphology .…”