Highly Uniform Carbon Sheets with Orientation-Adjustable Ordered Mesopores

Abstract

A soft-hard template-assisted method toward the unconventional free-standing ordered mesoporous carbon sheets (OMCSs) with uniform hexagonal morphology is developed by applying MgAl-layered double hydroxide (MgAl-LDH) as the hard template, triblock copolymer F127 as the soft template, and phenolic resols as the carbon sources. It is found that the surface of MgAl-LDH can induce the morphology variation of resol-F127 monomicelles, leading to the formation of vertically or horizontally aligned mesopore arrays in the OMCSs, which can in turn determine their electrochemical energy storage behaviors in supercapacitors with different configurations. In an all-solid-state supercapacitor with two face-to-face electrodes, an OMCS with vertical mesopores manifests the best performance among the samples. By contrast, in a micro-supercapacitor with in-plane film-like electrodes, an OMCS with horizontal mesopores delivers higher energy/power densities than the other OMCSs, which are also comparable to the state-of-the-art supercapacitors based on ordered mesoporous carbons. The achievement of uniform carbon sheets with orientation-adjustable mesopore arrays can help elucidate their electrochemical storage mechanism and allow the optimization of the performances according to the device configuration, thus providing a powerful tool for the manipulation of energy storage devices on the nanoscale.

Confined Synthesis of 2D Nanostructured Materials toward Electrocatalysis

“…It was found that the concentration of Co 2+ in the LDH laminates could greatly influence the growth of ZIF‐67 microcrystals and the final carbon‐based nanostructures. Similarly, Wu and co‐workers prepared ordered mesoporous carbon NSs by using LDHs as a surface‐confined nanoreactor 74. The surface of MgAl‐LDH plays a crucial role in tuning the orientation of mesopores in the carbon NSs, where vertically or horizontally aligned mesopores can be obtained.…”

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

“…For a long time in the past, the synthesis of pore‐controlled porous carbon materials resorted mainly to the template methods . And here, we abandoned the traditional methods and tried to make full use of the microstructure of the interpenetrating polymer networks to control the pore size.…”

“…For a long time in the past, the synthesis of pore-controlled porous carbon materials resorted mainly to the template methods. [22] And here, we abandoned the traditional methods and tried to make full use of the microstructure of the interpenetrating polymer networks to control the pore size. The synthetic route of microporous carbon material with uniform pore size and interconnected channel by the strategy of thermally decomposing MF/PAAS IPNs is as illustrated in Scheme 1A.…”

Balancing Porosity and Oxygen‐Containing Functionalities of Hierarchically Porous Carbons for Enhanced Capacitive Supercapacitors

“…An abundant of mesopores/macropores and large ion‐accessible surface areas are attractive features of porous carbon materials for electrochemical energy storage . To verify this advantage of porous carbon materials, CV and galvanostatic charge–discharge (GCD) tests were carried out by the three‐electrode system in 6 m KOH.…”