Electrophoretic co‐deposition of Bi₂O₃–multiwalled carbon nanotubes coating as supercapacitor electrode

Abstract

Nafion is suggested as an efficient assistant in preparing supercapacitor by employing nanoparticles. In this work, using a bi‐additive of 0.10‐mM NaOH + 0.10 g L−1 Nafion, Nafion‐assisted electrophoretic co‐deposition of Bi2O3–multiwalled carbon nanotubes (MWCNTs) coating is successfully realized in ethanol solvent. The capacitance performances of the electrophoretic coatings in 6.0‐M KOH electrolyte are investigated by cyclic voltammetry and galvanostatic charge–discharge techniques. Comparing with Bi2O3 coating prepared with electrophoretic deposition (EPD) by employing other additive (such as polyethyleneimine), the Bi2O3 coating prepared by Nafion‐assisted EPD shows a better capacitance performance. Benefiting from the improvement in coating conductivity caused by MWCNTs, with a small additional amount of 4.0 wt.%, the Bi2O3–MWCNTs coating exhibits an amazing 164% increase of mass‐specific capacitance (473 F g−1 at the current density of 1.0 A g−1) in comparison with pure Bi2O3 coating (179 F g−1 at the current density of 1.0 A g−1). The cyclic stability test exhibits excellent capacitance retention of 88.7% over 3000 cycles at a constant current density of 10.0 A g−1. This work combines the advantages of MWCNTs, Nafion, and EPD to provide a facile route for preparing Bi2O3‐based coating as a high‐performance supercapacitor electrode.

Recent Advanced Supercapacitor: A Review of Storage Mechanisms, Electrode Materials, Modification, and Perspectives

“…In order to effectively address these problems, the development of hybrid electrodes by combining metal oxides with carbon materials with a high specific surface area, such as activated carbon, graphene, CNTs, and carbon aerogels, has attracted widespread attention. Various metal oxide/carbon material composite electrodes for supercapacitors are summarized in Table 2 [ 181 , 182 , 183 , 184 , 185 , 186 , 187 , 188 , 189 , 190 , 191 , 192 , 193 , 194 , 195 , 196 , 197 , 198 , 199 , 200 , 201 ].…”

CNTs-Supercapacitors: A Review of Electrode Nanocomposites Based on CNTs, Graphene, Metals, and Polymers

“…As can be observed from Figure 3, the electrode nanocomposite based on the CNTs/graphene, CNTs/metal, and CNTs/polymer are more highlighted in the co-occurrence keywords analysis. Other characterizations such as symmetric [9][10][11], flexible [12,13], wearable electronic [14,15], cellulose [16][17][18], cycling stability [19,20], pseudocapacitor [21,22], solid-state supercapacitor [23][24][25], activated carbon [26][27][28], polymers [29][30][31], MXene [32,33], and CNTs [34][35][36][37][38][39][40][41][42][43][44][45][46] were mentioned in Figure 3. Nanomaterials are widely used for industrial applications such as supercapacitors, batteries, antibacterial activity, nano-membranes, and sensors [47][48][49][50][51][52]…”

Chemical Synthesis of Bismuth Oxide and Its Ionic Conversion to Bismuth Sulphide for Enhanced Electrochemical Supercapacitor Energy Storage Performance

“…12 Balaji et al, obtained Bi 2 O 3 -GO nanocomposite electrode material via microwave-oven-assisted carbonization method which produced an SC of 1250 F g −1 with exceptional cyclability of 80% after 5000 cycles at 1 A g −1 . 13 Ambare et al, produced polycrystalline, cubic crystal structure, and interconnected nanoplate-type Bi 2 O 3 using a soft spray pyrolysis method onto a nickel-foam (Ni-F) at 623 K that endowed an SC of 322.5 F g −1 at 5 mV s −1 scan rate in 1.0 M Na 2 SO 4 electrolyte solution. Moreover, with 99.9% retention of capacitance even after 5000 cycles, the asobtained Bi 2 O 3 nanoplate electrode was chemically stable and mechanically robust.…”