Ultra-large area graphene hybrid hydrogel for customized performance supercapacitors: High volumetric, areal energy density and potential wearability

Sikdar, Anirban; Majumdar, Abhisek; Dutta, Pronoy; Borah, Munindra; Kim, Sang Ouk; Maiti, Uday Narayan

doi:10.1016/j.electacta.2019.135492

Cited by 28 publications

(9 citation statements)

References 35 publications

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“…In order to compare such 3D Ag‐modified fibers current collector and the commonly used 2D membrane current collector, the electrochemical performance of RGO‐Cell paper (free‐standing without current collector), Ag film/RGO‐Cell paper (silver‐plated plastic film as the 2D current collector) and the Ag‐Cell/RGO‐Cell paper (3D Ag‐modified fibers current collector) was evaluated in a three‐electrode system, respectively. As shown in Figure 3A, the cyclic voltammetry (CV) curve of Ag‐Cell/RGO‐Cell paper presents a quasi‐rectangular shape, demonstrating the formation of electrolytic double layer capacitance, 53,54 while the inset‐area of the CV curves of RGO‐Cell paper and Ag film/RGO‐Cell paper decreased obviously. The area of the CV curve represents the capacitance of the electrode 55,56 .…”

Section: Resultsmentioning

confidence: 99%

High performance fully paper‐based all‐solid‐state supercapacitor fabricated by a papermaking process with silver nanoparticles and reduced graphene oxide‐modified pulp fibers

Huang

Yang

Chen

et al. 2021

EcoMat

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Herein, a fully paper‐based all‐solid‐state supercapacitor with functionalized cellulose paper as electrodes, carboxymethyl cellulose gel as solid electrolyte and cellulose paper as separator was fabricated. The electrode was fabricated by a conventional papermaking process with silver‐modified fibers and graphene oxide (GO)‐modified fibers followed by reduction of GO. The Ag‐modified fibers and GO‐modified fibers were obtained by in situ growth of Ag nanoparticles and self‐assembly of GO sheets on cellulose fibers, respectively. Ag‐modified fibers act as a flexible current collector with rich three‐dimensional interconnected electron transport pathways to make the reduced GO‐modified fibers as electrode materials to achieve high conductivity (1.93 Ω sq−1) and high‐rate capability. Simple drying can reduce 40% weight of the supercapacitor to facilitate transportation and storage, and its capacitance efficiency can be recovered by wetting when needed. This work opens up a new way of developing cheap, green and high performance full‐paper flexible electronics by conventional papermaking process.

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Section: Resultsmentioning

confidence: 99%

High performance fully paper‐based all‐solid‐state supercapacitor fabricated by a papermaking process with silver nanoparticles and reduced graphene oxide‐modified pulp fibers

Huang

Yang

Chen

et al. 2021

EcoMat

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“…1c, the GO spectrum displays several peaks at about 3421 cm À1 , 1635 cm À1 , 1384 cm À1 and 1089 cm À1 correspond to the stretching vibration of O-H in physisorbed water or carboxylate moieties, C]O in carboxylic acid, C-OH and C-O, respectively, denoting the presence of massive oxygencontaining functional groups. 27 Compared with GO, in the spectra of GH and NOGHs, the characteristic peaks of these oxygen-containing functional groups are signicantly weakened, indicating that GO is partially reduced. Meanwhile, there are two new peaks at 1560 cm À1 and 1087 cm À1 in the spectra of NOGHs corresponding to the stretching vibrations of C]N (Fig.…”

Section: Resultsmentioning

confidence: 99%

N/O co-enriched graphene hydrogels as high-performance electrodes for aqueous symmetric supercapacitors

et al. 2021

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“…The GH was prepared through an ammonia assisted electroless reduction and ultrafast assembly of graphene oxide. 17 Namely, graphene oxide aqueous dispersion (4 mg mL −1 , 5 mL), prepared via our previous synthesis protocol, 18 was first mixed with 5 mL of ammonium hydroxide solution (NH 3 .H 2 O, 30 wt %). Then, a precleaned zinc foil (Zn) of dimension 60 mm × 70 mm × 0.25 mm was immersed directly into the above solution for the simultaneous reduction and gelation process.…”

Section: Methodsmentioning

confidence: 99%

Polyaniline–Graphene Hydrogel Hybrids via Diffusion Controlled Surface Polymerization for High Performance Supercapacitors

Sikdar

Deb

Gogoi

et al. 2020

ACS Appl. Nano Mater.

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The intricate design of nanomaterials through the controlled diffusion process is natural for biological bodies; however, understanding this mechanism for the development of morphology tuned nanomaterials in the practical chemical synthesis process is still lacking. Herein, we present the development of graphene hydrogel via ultrafast assembly and employed it as a diffusion controlled confined reactor for the growth of ultrafine polyaniline nanostructure directly over its hydrogel surface (PANI–GH). The significant control over the polymerization rate is achieved by slowing the diffusion of monomers through the hydrogel–organic interface and subsequent confined polymerization within the porous compartments of graphene hydrogel. In addition, the strong attractive interaction of aniline monomer with the graphene surface plays a key role in controlling the oriented nucleation process, as revealed from the molecular dynamics study. The as-developed PANI–GH with commercial scale mass loading (8.8 mg cm–2) exhibits excellent supercapacitive performance, displaying a capacitance of 503 F g–1 and superb retention (95.8%) even after 3000 charge–discharge cycles. More importantly, it showed a very high rate capability with a capacity retention of 88.6% when the current density increased from 2 to 30 A g–1. This fundamental understanding of the hydrogel mediated interfacial reaction together with outstanding performance metrics of the as-developed material could open up a versatile platform for morphology tuned graphene based functional hybrids.

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Ultra-large area graphene hybrid hydrogel for customized performance supercapacitors: High volumetric, areal energy density and potential wearability

Cited by 28 publications

References 35 publications

High performance fully paper‐based all‐solid‐state supercapacitor fabricated by a papermaking process with silver nanoparticles and reduced graphene oxide‐modified pulp fibers

High performance fully paper‐based all‐solid‐state supercapacitor fabricated by a papermaking process with silver nanoparticles and reduced graphene oxide‐modified pulp fibers

N/O co-enriched graphene hydrogels as high-performance electrodes for aqueous symmetric supercapacitors

Polyaniline–Graphene Hydrogel Hybrids via Diffusion Controlled Surface Polymerization for High Performance Supercapacitors

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