Hierarchical Nanoporous Carbon Templated and Catalyzed by the Bicontinuous Nanoporous Copper for High Performance Electrochemical Capacitors

Abstract

To enhance the performance of electrochemical capacitor, the nanostructured carbon materials with large surface area, appropriate pore distributions, suitable electronic conductivity and perfect chemical stability are pursued. Herein, the highly graphitized hierarchical porous carbon with well-defined porosity are fabricated. For the first time, the novel bicontinuous nanoporous copper is used as both the template and the catalyst to synthesize the porous carbon materials. The asprepared porous carbon demonstrates a high specific surface area of 1826 m 2 g À 1 benefitting from the bicontinuous nanoporous copper template and KOH activation. By electrochemical test, the nanoporous carbon material displays a specific capacitance of 210 F g À 1 at a current density of 0.2 A g À 1 within 6 M KOH aqueous solution. The material demonstrates excellent cycling stability with a 95.4% capacity retention for 10 000 cycles with a current density of 1 A g À 1 . The present work provides a facile approach for fabrication of carbon-based electrode materials for electrochemical capacitors.

Hierarchical Porous Carbon Aerogel Derived from Sodium Alginate for High Performance Electrochemical Capacitor Electrode

“…Figure 2e,f shows the CV curves for the four carbonization temperatures at 2 mV s −1 and 200 mV s −1 scan rates, respectively. The cyclic voltammetry curves of the 800 °C carbonized sample, at both 2 mV s −1 and 200 mV s −1 scan rates, show an approximate rectangle which is much better than that of previous reports [27,30] with the area enclosed by the curves being significantly larger than that of the other three samples. At scan rates of 2 mV s −1 and 200 mV s −1 , the specific capacitances are 91 F g −1 and 57 F g −1 , respectively.…”

“…The KOH activation procedure follows the methodology outlined in prior research with slight modification [27]. Briefly, The carbon aerogels, as prepared, were blended with a 6 M KOH solution, maintaining a KOH/carbon aerogel weight ratio of 3:1.…”

Sensitivity Detection of Uric Acid and Creatinine in Human Urine Based on Nanoporous Gold

“…are gradually used to fabricate non-enzymatic electrochemical sensors, especially nanoporous metals [ 35 ]. Nanoporous metals possess a high specific surface area with ideal pore sizes and size distributions, and high gross pore volume [ 36 , 37 , 38 ]. It is supposed that the excellent three dimensional nanoporous structure of nanoporous metals may enhance electron transfer and mass transfer of the modified electrodes, which, in turn, may improve the analytical performance of non-enzymatic electrochemical sensors.…”