V2O5 encapsulated MWCNTs in 2D surface architecture: Complete solid-state bendable highly stabilized energy efficient supercapacitor device

Abstract

A simple and scalable approach has been reported for V2O5 encapsulation over interconnected multi-walled carbon nanotubes (MWCNTs) network using chemical bath deposition method. Chemically synthesized V2O5/MWCNTs electrode exhibited excellent charge-discharge capability with extraordinary cycling retention of 93% over 4000 cycles in liquid-electrolyte. Electrochemical investigations have been performed to evaluate the origin of capacitive behavior from dual contribution of surface-controlled and diffusion-controlled charge components. Furthermore, a complete flexible solid-state, flexible symmetric supercapacitor (FSS-SSC) device was assembled with V2O5/MWCNTs electrodes which yield remarkable values of specific power and energy densities along with enhanced cyclic stability over liquid configuration. As a practical demonstration, the constructed device was used to lit the ‘VNIT’ acronym assembled using 21 LED’s.

Efficient Flexible All-Solid Supercapacitors with Direct Sputter-Grown Needle-Like Mn/MnOx@Graphite-Foil Electrodes and PPC-Embedded Ionic Electrolytes

“…For practical applications, the electrochemical study of a supercapacitor cell using two-electrode measurements are more reliable to investigate the electrochemical properties of the electrodes, including the synthesis method, than those of three electrode measurements [ 2 , 37 ]. The electrochemical performance of this flexible supercapacitor (FSC) cell based on Mn/MnO x @Graphite foil electrodes and polymer gel electrolyte is given in Figure 2 .…”

V2O5 and its Carbon‐Based Nanocomposites for Supercapacitor Applications

“…prepared flake‐like nanostructured V 2 O 5 which exhibited specific capacitance ∼735 F g −1 at scan rate of 1 mV s −1 in 2 M LiClO 4 electrolyte . Very recently the same group has fabricated solid‐state bendable 2D surface architecture based V 2 O 5 encapsulated MWCNTs network morphology that possessed outstanding charging‐discharging efficacy with good cycling retention efficacy in liquid‐electrolytes . Recent reports convey that V 2 O 5 supercapacitors with large retention capacity have been successfully synthesized by means of microwave‐assisted hydrothermal synthesis (MAHS) method.…”

Facile SILAR Processed Bi2S3:PbS Solid Solution on MWCNTs for High‐performance Electrochemical Supercapacitor

“…Thus, the crystalline planes of both Bi 2 S 3 and PbS are present in XRD pattern, confirming the synthesis of Bi‐Pb‐S composite system. The additional peaks correspond to the SS substrate except the characteristic peak present at 25.58° for graphitic carbon due to inclusion of MWCNTs to make nanocomposite solid solution …”

“…The MWCNTs were synthesized on stainless steel (SS) substrate by adopting our previously reported procedure . Room temperature SILAR method was utilized to deposit ternary composite Bi 2 S 3 :PbS solid solution on previously prepared MWCNTs/SS substrate (Figure ) .…”