A new strategy for anchoring a functionalized graphene hydrogel in a carbon cloth network to support a lignosulfonate/polyaniline hydrogel as an integrated electrode for flexible high areal-capacitance supercapacitors

Wu, Dan; Zhong, Wenbin

doi:10.1039/c8ta11153g

Cited by 136 publications

(67 citation statements)

References 57 publications

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“…It can be interpreted that after the chemical oxidation treatment, the oxygen‐containing functional groups in the activated CC (HHK‐CC) increase significantly. As a result, its hydrophilicity enhances accordingly, and the flexible electrode material HHK‐CC@Ti 3 C 2 T X can easily form by the hydrogen bonds or electrostatic interaction between the rich functional groups of OH, O, or F on the surface of Ti 3 C 2 T X and the activated CC …”

Section: Introductionmentioning

confidence: 99%

A MXene‐Coated Activated Carbon Cloth for Flexible Solid‐State Supercapacitor

et al. 2020

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Herein, a new electrode material HHK‐CC@Ti3C2TX (HHK‐CC = activated carbon cloth, TX = F, O, or OH) for a flexible solid‐state supercapacitor (SSC) is prepared by a simple method. The activated carbon cloth (HHK‐CC) is obtained by treating with potassium permanganate beforehand. The specific area, oxygen‐containing functional group, hydrophilicity, and electrical conductivity of the activated CC are increased significantly after the potassium permanganate treatment. A few layers of Ti3C2TX flakes are coated directly on the HHK‐CC. When the loading Ti3C2TX on the HHK‐CC@Ti3C2TX electrode is 3 mg cm−2, the prepared electrode achieves a high capacitance of 1033 mF cm−2 at the current density of 1 mA cm−2. After assembling as a symmetrical SSC, the flexibility and mechanical strength of the CC are still preserved and no significant capacitance decreasing is observed under the conditions of bending and deformation. The capacitance value remains at 94.2% after 1000 cycles, and a high power density of 0.779 W cm−2 is obtained at the energy density of 4.5 μWh cm−2. This work gives a new strategy for designing flexible supercapacitors.

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Section: Introductionmentioning

confidence: 99%

A MXene‐Coated Activated Carbon Cloth for Flexible Solid‐State Supercapacitor

et al. 2020

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“…As shown in Table , the relative nitrogen contents of RFC and D‐CNT@RFC are found to be 1.91 and 1.86 at %, respectively. Three types of nitrogen, namely pyridinic‐N at 398.4 eV, pyrrolic‐N at 400.7 eV and quaternary‐N at 401.6 eV, can be distinguished in the carbons by deconvolution analysis of the N1s core‐level spectra (Figure e) …”

Section: Resultsmentioning

confidence: 99%

“…Three types of nitrogen, namely pyridinic-N at 398.4 eV, pyrrolic-N at 400.7 eV and quaternary-N at 401.6 eV, can be distinguished in the carbons by deconvolution analysis of the N1s core-level spectra (Figure 3e). [34] To assess the electrochemical performance of the obtained carbon xerogels, the products were applied as electrodes for supercapacitors. Due to the charge resistance of the samples in the selected voltage range, cyclic voltammograms curves show an asymmetric quasi-rectangular shape (Figure 4a).…”

Section: Resultsmentioning

confidence: 99%

Highly Stable Dispersion of Carbon Nanotubes in Deep Eutectic Solvent for the Preparation of CNT‐Embedded Carbon Xerogels for Supercapacitors

et al. 2019

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The current study reports a kind of ternary deep eutectic solvent (DES) based on choline chloride, urea, and glycerol for the dispersion of multi‐walled carbon nanotubes (MWCNT) in the presence of surfactant. MWCNT‐embedded organic gels were subsequently prepared from the polymerization of resorcinol and formaldehyde in the obtained MWCNT‐dispersed DES. It has been demonstrated that the as‐prepared DES is excellent in dispersing and stabilizing the MWCNT, and thus allows the in situ synthesis of MWCNT functionalized resorcinol‐formaldehyde xerogels with no visible phase‐separation during the long sol‐gel process. After ambient drying and carbonization, MWCNTs can be well dispersed within the carbon xerogel matrix. The obtained carbon material possesses increased electrical conductivity while preserves the well‐developed porous structure. When used as electrodes in supercapacitors, it exhibits enhanced capacitance as well as rate performance. The specific capacitance at 0.5 A g−1 was 228 F g−1, 22 % more capacitance than that of the pristine carbon xerogel. More remarkably, it provides the electrodes with more than 200 % enhancement in capacitance when compared with that of the MWCNT‐embedded carbon xerogel prepared in aqueous solvent under the same conditions.

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“…c) Preparation process of Lignin/PANI/FGH/FCC and capacitance retention of the supercapacitor after mechanical folding cycles (the inset shows the CV curves at 10 mV s −1 for different bending angles. Reproduced with permission . Copyright 2019, The Royal Society of Chemistry.…”

Section: Biomacromolecules For Electrochemical Energy Storagementioning

confidence: 99%

“…Furthermore, the FSC showed outstanding electrochemical stability with 98% capacitance retention in 1000 bending cycles for 90°. Another remarkable example using lignin in FSC was most recently published by Wu et al . They demonstrated an interconnected 3D porous conductive network by attaching functionalized graphene hydrogel (FGH) in chemically oxidized carbon cloth (CC) via a one‐step hydrothermal process, with subsequent chemical deposition of the lignin/polyaniline (PANI) hydrogel, resulting in a complete coverage of the functionalized CC by the functionalized graphene hydrogel/(FGH/FCC) (Figure c).…”

Section: Biomacromolecules For Electrochemical Energy Storagementioning

confidence: 99%

Enhancing Energy Storage Devices with Biomacromolecules in Hybrid Electrodes

Ajjan

Mecerreyes

Inganäs

2019

Biotechnology Journal

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The development of energy storage devices with higher energy and power outputs, and long cycling stability is urgently required in the pursuit of the expanding challenges of electrical energy storage. The utilization of biologically renewable redox compounds holds a great potential in designing sustainable energy storage systems and contributes in reducing the dependence on fossil fuels for energy materials. Quinones are the principal redox centers in natural organic materials and play a key role as charge storage electrode materials because of their abundance, multiple forms and integration into the materials flow through the biosphere. Electrical energy storage devices and systems can be significantly improved by the combination of scalable quinone‐based biomaterials with good electronic conductors. This review uses recent examples to show how biopolymers are providing new directions in the development of renewable biohybrid electrodes for energy storage devices.

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A new strategy for anchoring a functionalized graphene hydrogel in a carbon cloth network to support a lignosulfonate/polyaniline hydrogel as an integrated electrode for flexible high areal-capacitance supercapacitors

Abstract: Fully utilizing the space of CC allows achieving an electrode with high mass loading and low interfacial resistance for high-performance supercapacitors.

Cited by 136 publications

References 57 publications

A MXene‐Coated Activated Carbon Cloth for Flexible Solid‐State Supercapacitor

A MXene‐Coated Activated Carbon Cloth for Flexible Solid‐State Supercapacitor

Highly Stable Dispersion of Carbon Nanotubes in Deep Eutectic Solvent for the Preparation of CNT‐Embedded Carbon Xerogels for Supercapacitors

Enhancing Energy Storage Devices with Biomacromolecules in Hybrid Electrodes

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