The Large Electrochemical Capacitance of Microporous Doped Carbon Obtained by Using a Zeolite Template

Abstract

A novel microporous templated carbon material doped with nitrogen is synthesized by using a two‐step nanocasting process using acrylonitrile (AN) and propylene as precursors, and Na–Y zeolite as a scaffold. Liquid‐phase impregnation and in situ polymerization of the nitrogenated precursor inside the nanochannels of the inorganic scaffold, followed by gas‐phase impregnation with propylene, enables pore‐size control and functionality tuning of the resulting carbon material. The material thereby obtained has a narrow pore‐size distribution (PSD), within the micropore range, and a large amount of heteroatoms (i.e., oxygen and nitrogen). In addition, the carbon material inherits the ordered structure of the inorganic host. Such features simultaneously present in the carbon result in it being ideal for use as an electrode in a supercapacitor. Although presenting a moderately developed specific surface area (SBET = 1680 m2 g–1), the templated carbon material displays a large gravimetric capacitance (340 F g–1) in aqueous media because of the combined electrochemical activity of the heteroatoms and the accessible porosity. This material can operate at 1.2 V in an aqueous medium with good cycleability—‐beyond 10 000 cycles—and is extremely promising for use in the development of high‐energy‐density supercapacitors.

Synthesis of Microporous Carbon Nanofibers and Nanotubes from Conjugated Polymer Network and Evaluation in Electrochemical Capacitor

“…[29][30][31] Specifically, microporous carbons are ideal materials for the electrochemical double-layered capacitors that has been considered as a promising high power energy sources. [32,33] Therefore, as a typical example in the present work, Py-CPN3 was explored as electrodes applied in a EDLC www.afm-journal.de device and compared to commercial available CNTs.…”

Large Surface Area Ordered Porous Carbons via Nanocasting Zeolite 10X and High Performance for Hydrogen Storage Application

“…We think that most of such oxygen functionalization was introduced into the framework during etching process, as is a case for most carbons derived via the nanocasting method. 20,28,46,52,53 In addition, a small part of oxygen atoms can also result from the moisture, atmospheric oxygen or CO 2 adsorbed on the surface of carbons. All the results declared above underline the importance in producing a replication structure with a high level of zeolite-like orderings, ensuring large surface areas and high pore volumes and therefore resulting in a large storage capacity.…”

A review of electrode materials for electrochemical supercapacitors

“…Some studies have reported that pore sizes of either 0.4 or 0.7 nm could be suitable for aqueous electrolytes, while a pore size of around 0.8 nm might be better for organic electrolytes. 84,86 In recent papers, 1,105 the match between pore size and ion size was demonstrated through achieving a maximum capacitance.…”