Bamboo-like Composites of V₂O₅/Polyindole and Activated Carbon Cloth as Electrodes for All-Solid-State Flexible Asymmetric Supercapacitors

Abstract

A bamboo-like nanomaterial composed of V2O5/polyindole (V2O5/PIn) decorated onto the activated carbon cloth was fabricated for supercapacitors. The PIn could effectively enhance the electronic conductivity and prevent the dissolution of vanadium. And the activation of carbon cloth with functional groups is conducive to anchoring the V2O5 and improving surface area, which results in an enhancement of electrochemical performance and leads to a high specific capacitance of 535.5 F/g. Moreover, an asymmetric flexible supercapacitor based on V2O5/PIn@activate carbon cloth and reduced graphene oxide (rGO)@activate carbon cloth exhibits a high energy density (38.7 W h/kg) at a power density of 900 W/kg and good cyclic stability (capacitance retention of 91.1% after 5000 cycles). And the prepared device is shown to power the light-emitting diode bulbs efficiently.

Carbon Cloth‐based Hybrid Materials as Flexible Electrochemical Supercapacitors

“…Apart from MnO 2 , there have been several other metallic and bimetallic oxides such as V 2 O 5 , Fe 2 O 3 , NiO, MoO 3 , ZnO, WO 3 , CoMoO 4 , NiMoO 4 , NiCo 2 O 4 , FeCo 2 O 4 , which have been deposited onto the carbon cloths to fabricate supercapacitor electrodes. Recently, ZnO@C@NiO core‐shell nanorods arrays were grown upon carbon cloth substrate .…”

Self‐Assembly of Solution‐Processable Polyindole via Langmuir‐Blodgett Technique: An Insight to Layer‐Dependent Charge Transport and Electronic Parameters

“…However, their two most important downsides i. e. poor conductivity and poor solubility in common volatile organic solvents have plagued them for practical applications and fabrication of devices. Though, various nanocomposites of PIn have been prepared which exhibit good electro catalytic activity, photoelectrochemical property as well as better electrical properties . Still, the issue of solution processability and poor conductivity hang on the major limiting factor for its broad practical applications.…”

All‐Solid‐State, Foldable, and Rechargeable Zn‐Air Batteries Based on Manganese Oxide Grown on Graphene‐Coated Carbon Cloth Air Cathode

“…Despite the similar discharge profile, the smaller footprint of the folded battery results in higher current per unit area and in turn a larger power density than the battery at its flat state. In term of power density, the folded MnO x -GCC-based battery here has outperformed the single-cell solid-state rechargeable Zn-air battery using LaNiO 3 /CNT catalyst loaded on carbon cloth as cathode (≈28.2 mW cm −2 ), [13] while lower than that of a battery using graphene oxide/cellulose-based solid electrolyte (≈44.1 mW cm −2 ). Similar approach was used to increase the areal energy density of the foldable Li-ion batteries where areal capacity of the folded batteries is about twice of its unfolded counterpart.…”

“…The conducting graphene flakes naturally fill up the gaps between the CC fibers ( Figure 1d,e and Figures S5 and S6, Supporting Information), retaining high conductivity and a porous structure for the www.advenergymat.de www.advancedsciencenews.com benefit of charge transfer and diffusion of oxygen and electrolyte. [13] O 1s peak further clearly proved the existence of oxygen functional groups with OC and OC bonds ( Figure S7, Supporting Information). The peak can be deconvoluted into four peaks at 285, 285.6, 287.5, and 290.5 eV which are attributed to CC, COH, CO, and OCO bond, respectively.…”

“…[13] Carbon cloth (3 × 1 cm 2 ) was first cleansed with acetone and deionized (DI) water, prior to the immersion into 60 mL of concentrated H 2 SO 4 and HNO 3 (ratio 2:1) for 30 min. [13] Carbon cloth (3 × 1 cm 2 ) was first cleansed with acetone and deionized (DI) water, prior to the immersion into 60 mL of concentrated H 2 SO 4 and HNO 3 (ratio 2:1) for 30 min.…”