Dispersing WO3 in carbon aerogel makes an outstanding supercapacitor electrode material

Improved pseudocapacitive performance of well-defined WO3−x nanoplates

“…The Brunauer-Emmett-Teller (BET) surface areas of the as-WO 3À x , 400-WO 3À x , 500-WO 3À x , and c-WO 3 were 19.5, 19.1, 14.2, and 2.4 m 2 g À 1 , respectively (Fig. S4), and they were relatively lower compared to previous reports on WO 3 -based nanostructures [32][33][34]. However, the relatively low specific capacitance of the nanoplates may be attributed to the low BET surface area, compared to WO 3 nanoparticles (50-100 F g À 1 ) reported in the literature [32].…”

“…S4), and they were relatively lower compared to previous reports on WO 3 -based nanostructures [32][33][34]. However, the relatively low specific capacitance of the nanoplates may be attributed to the low BET surface area, compared to WO 3 nanoparticles (50-100 F g À 1 ) reported in the literature [32]. The further works will be carried out to develop tungsten sub-oxide nanoparticles with high surface area and porous structure for the improved specific capacitance.…”

Hydrothermal preparation and supercapacitive performance of flower-like WO3·H2O/reduced graphene oxide composite

“…Especially, the engineered WO 3 hierarchical nanostructures are expected to exhibit desirable electrochemical property for their shortened diffusion lengths for ions and large exposed surface for access of electrolyte. Another practical approach toward improving performance is to combine WO 3 with other conductive materials such as conductive polymers, carbon aerogel and graphene nanosheets to fabricate composites [25,26,28,30]. Amongst, graphene, a flat monolayer of carbon atoms arranged in a 2D honeycomb lattice, has been confirmed to be an ideal candidate to fabricate composites due to its fascinating properties such as superior electrical conductivity, large surface area and excellent mechanical flexibility [31].…”

ZrO2–SiO2 Nanosheets with Ultrasmall WO3 Nanoparticles and Their Enhanced Pseudocapacitance and Stability

“…All the Faraday curves are highly electrochemically reversible at a high scan rate of 500 mV/s, indicating the occurrence of the Faraday redox reaction in the 2 M KCl electrolyte. 37 In addition, as the scan rate increases from 100 to 500 mV/s, a cathodic peak current appeared at approximately −0.42 V vs Ag/AgCl and an anodic peak current at approximately −0.22 V vs Ag/AgCl; these currents were directly proportional to the CV scan rate. The obtained results indicate that the highly ordered porous ZrO 2 −SiO 2 NS impregnated with WO 3 NP electrode behaves as a pseudocapacitor within the potential window varying from −1.3 to +1.1 V. Figure 5c shows the first charge−discharge profiles of the highly ordered porous ZrO 2 −SiO 2 NS with ultrasmall WO 3 NP and ZrO 2 −SiO 2 NS electrodes between −1.2 and 1.1 V (vs Ag/ AgCl) at a galvanostatic current density of 30 A/g in the 2 M KCl electrolyte.…”