A novel sol-gel strategy for N, P dual-doped mesoporous carbon with high specific capacitance and energy density for advanced supercapacitors

Synthesis of hydrophilic hierarchical carbon via autonomous SiO 2 etching by fluorinated polymers for aqueous supercapacitor

“…Furthermore, the previous mesoporous carbon synthesis involving hard templating should employ a strong acid or alkaline solution to derive the mesopore by etching an employed SiO 2 template. 21,26,[45][46][47][48][49]80 By contrast, our solgel route using the fluorine-containing polymers provides an innovative approach to build the porous carbon material suitable for an aqueous-based supercapacitor conveniently and safely.…”

“…The previous sol-gel routes employing a SiO 2 template had to use a hazardous acid or alkaline media to discard the template. 21,26,[45][46][47][48][49] Etching by the fluorine-containing precursors was actively employed to design a safe and convenient SiO 2 removal process using the templating method.…”

Doping strategy, properties and application of heteroatom-doped ordered mesoporous carbon

“… 8,9 The well-designed mesoporous structure could shorten ion transport pathways and favor the diffusion of ions into the inner pores. 10,11 In 1999, Ryoo's group used MCM-48 as template, sucrose as carbon precursor, and sulfuric acid as catalyst to prepare OMC with a SSA of 1380 m 2 g −1 . Afterwards, the synthesis and application of OMC in contaminant adsorbent, catalyst, lithium battery, supercapacitor, and hydrogen storage have been performed by many outstanding researchers, such as Sheng Dai, 12 Nishiyama, 13 and Dongyuan Zhao.…”

Tetra‐Heteroatom‐Doped Ultra‐Mesoporous Carbon from Polyphosphazene for High‐Performance Supercapacitors

“…[7] Ultrahigh specific surface area carbons (e. g. above 2000 m 2 /g) with hierarchically micro-/mesoporous structure have been prepared via metal-organic frameworks, sol-gel, templating, as well as activation of precursors. [8][9][10][11][12][13][14][15][16] These porous structures of carbon materials show abilities to reduce ion diffusion resistance and adsorb massive electrolyte ions, both of which can further enhance the capacity for supercapacitors. Furthermore, the presence of mesopores can facilitate electrolyte ion transportation to improve the power performance at high current densities, which could make sure that micropores are accessible to the electrolyte ions for high capacity.…”

“…The high surface area provides large electrolyte/electrode contact surfaces, the specific capacitance is tightly dependent on the surface area [7] . Ultrahigh specific surface area carbons (e. g. above 2000 m 2 /g) with hierarchically micro‐/mesoporous structure have been prepared via metal‐organic frameworks, sol‐gel, templating, as well as activation of precursors [8–16] . These porous structures of carbon materials show abilities to reduce ion diffusion resistance and adsorb massive electrolyte ions, both of which can further enhance the capacity for supercapacitors.…”