A molecular engineering approach to pore-adjustable nanoporous carbons with narrow distribution for high-performance supercapacitors

Abstract

The space-confined twin-polymerization of silanes induces large-micropores and/or small-mesopores into porous carbons with large specific capacitance and high rate capability.

Simultaneously Crafting Single‐Atomic Fe Sites and Graphitic Layer‐Wrapped Fe3C Nanoparticles Encapsulated within Mesoporous Carbon Tubes for Oxygen Reduction

“…[ 32,33 ] The Raman spectra (Figure 3i) of Fe‐N‐HMCTs and N‐HCTs display the distinct D band peak at 1332 cm –1 and G band peak at 1583 cm –1 , corresponding to the different vibration modes of disordered carbon atoms and well‐ordered sp 2 ‐bonded graphitic carbon atoms, respectively. [ 34,35 ] Obviously, the Fe‐N‐HMCTs exhibited a higher degree of graphitization than that of N‐HCTs. The ratio of the integrated intensities of D band to G band ( I D /I G ) reduced from 1.12 to 0.95, implying that a high content of ordered graphitic carbon was produced in Fe‐N‐HMCTs due to the generation of graphitic carbon shells during calcination resulted from the in situ catalytic effect of the introduced Fe species.…”

Applications and challenges of porous carbon with different dimensions in supercapacitors—a mini review

“…For instance, AC-based materials have long been the priorities for SC electrodes due to their superior microporosity. These materials are usually derived from precarbonization process of multifarious detail carbon-rich precursors like porous polymer precursors (Lei et al, 2019;Lu et al, 2019;Lei et al, 2020) and consequent physical/ chemical activation reaction to fabricate microporous structures. Physical activation is the most commonly employed preparation method for AC in large-scale industrial production.…”

Surfactant‐Directed Engineering of Hierarchical Porous Heteroatom‐Doped Carbons for High‐Energy Supercapacitors

“…[ 6 ] To improve the electrochemical performance of carbon‐based supercapacitors, the typical remedies can be roughly summed up as follows: 1) increasing SSA of carbon‐based electrode materials, which enhances the storage capacity and 2) introducing heteroatom (N, O, P, or S), which not only refines their wettability and electronic properties, but also induces pseudocapacitance via Faradaic reactions. [ 7,8 ]…”

“…[6] To improve the electrochemical performance of carbonbased supercapacitors, the typical remedies can be roughly summed up as follows: 1) increasing SSA of carbon-based electrode materials, which enhances the storage capacity and 2) introducing heteroatom (N, O, P, or S), which not only refines their wettability and electronic properties, but also induces pseudocapacitance via Faradaic reactions. [7,8] Incorporating porous structures is widely acknowledged as an efficacious tactic to increase the SSA of carbon-based electrode materials. [9] Basically, both micropores and mesopores are conducive to attain large electrochemical approachable SSA, enabling a high specific capacitance.…”