Porous structure engineering of N-doped carbons for enhanced mass transfer towards High-Performance supercapacitors and Li-Ion batteries

Green fabrication of pore-modulated carbon aerogels using a biological template for high-energy density supercapacitors

“…In order to deeply understand the influence of hierarchically porous structures on electrolyte ion diffusion, COMSOL Multiphysics simulation was conducted to investigate the transient concentration distribution of K + within the pore structures of BAC-800, AC-800 and BAPC-800 during the charging process. 69 A large number of micropores/mesopores generated by the activation of KOH on the pore array of the carbon materials facilitate the transport of large amounts of electrolytes to the electrode and electrolyte surfaces, so the effect of micropores/mesopores was mainly simulated and analyzed. In this simulation, a sphere with a radius of 10 μm was employed as a porous model and the boundary condition was set to 6 mol L −1 K + , as well as the porosity distribution and effective diffusion coefficient of electrolyte were calculated based on the equations (ESI†) and BET results are presented in Table S8 †.…”

Coal-based ultrathin N-doped carbon nanosheets synthesized by molten-salt method for high-performance lithium-ion batteries

“…N-PCNS displayed a good cycling performance of 344.6 mAh g −1 after 500 cycles even at 5 A g −1 , and it still has a capacity of 175 mAh g −1 after 1000 cycles with a coulombic efficiency of nearly 100% (figure 3(e)). As shown in table 1, the electrochemical performance of N-PCNS is significantly better than the currently reported carbon-based electrode materials [39][40][41][42][43][44]. The electrochemical impedance spectroscopy was conducted to determine kinetics of PCNS and N-PCNS electrodes (figure S3(b)).…”

Molecular Understanding of Bilayer Structural Transition of CO2 at the Ionic Liquid-Carbon Nanotube Electrode Interface

“…3 The CO 2 RR performance relies primarily on both the electrocatalysts and the reaction environment surrounding the solid−liquid−gas interface. 4 During the processes of CO 2 RR, the electrolyte attaches to the electrode surface, forming an electrical double-layer structure that changes interfacial structure, 5 which is related to the subsequent reaction process. Carbon nanotubes are used as carriers to increase the active sites of some organic catalysts, 6 and ionic liquid (IL) are solvent-free electrolytes and have been regarded as an excellent choice for use in CO 2 RR due to their wide electrochemical window and stable physicochemical properties.…”

“…Electric double-layer capacitors (EDLC) are high-density energy storage devices, which are widely used in energy storage and reduction reaction of CO 2 (CO 2 RR) . The CO 2 RR performance relies primarily on both the electrocatalysts and the reaction environment surrounding the solid–liquid–gas interface . During the processes of CO 2 RR, the electrolyte attaches to the electrode surface, forming an electrical double-layer structure that changes interfacial structure, which is related to the subsequent reaction process.…”