Polyaniline- and poly(ethylenedioxythiophene)-cellulose nanocomposite electrodes for supercapacitors

Liew, Soon Yee; Thielemans, Wim; Walsh, Darren A.

doi:10.1007/s10008-014-2669-7

Cited by 30 publications

(22 citation statements)

References 60 publications

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“…[2][3][4][5][6] They have been widely studied as a reinforcing agent in a wide range of polymer matrices. [7][8][9] Beside this initial application, the potential of CNCs to be used as a building block in more complex systems has been recognised and they have since been investigated for applications ranging from optical materials, [10,11] to permselective membranes, [12] electrode modifiers for electrochemical sensors, [13] supercapacitors, [14][15][16] and algae flocculants with and without pH responsiveness. [17,18] While many of these applications can make use of "unmodified" cellulose nanocrystals, i.e.…”

Section: Introductionmentioning

confidence: 99%

Coumarin and carbazole fluorescently modified cellulose nanocrystals using a one‐step esterification procedure

2016

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This article is protected by copyright. All rights reserved Fluorescent cellulose nanocrystals with carbazole and coumarin functionalities were synthesised in a one-step esterification reaction using carbazole-9-yl-acetic acid and coumarin-3-carboxylic acid respectively, using a p-toluenesulfonyl chloride/pyridine system. Characterization with elemental analysis, X-ray diffraction, X-ray photoelectron spectroscopy, infrared, absorption and emission spectroscopy, and AFM and TEM imaging confirmed that a high degree of modification could be achieved (up to DS surf = 1.33) while retaining the CNC core crystallinity and nanoparticle dimensions. The present grafting method gives a straightforward way when compared with previously reported fluorescent labelling methodologies and gives an extremely high grafting density while retaining the CNC crystallinity. UV spectroscopy also indicates fluorescence quenching at high grafting densities so that optimal fluorescence does not necessarily mean maximum grafting density. This

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Section: Introductionmentioning

confidence: 99%

Coumarin and carbazole fluorescently modified cellulose nanocrystals using a one‐step esterification procedure

2016

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“…[7][8][9] Polyaniline (PANI) is a conductive polymer which has been widely used to develop flexible pseudocapacitors because of its simplistic preparation, low cost, high electrical conductivity, and fast redox kinetics. [10][11][12][13][14][15] During charging and discharging process, PANI chains experience frequent swelling and shrinking due to doping and de-doping of counter-ions. This phenomenon causes structural instability and eventually results in fast capacitance decay.…”

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confidence: 99%

Flexible supercapacitor based on three‐dimensional cellulose/graphite/polyaniline composite

et al. 2018

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Summary Fast charge‐discharge rate and high areal capacitance, along with high mechanically stability, are the pre‐requisites for flexible supercapacitors to power flexible electronic devices. In this paper, we have used three‐dimensional polyacrylonitrile graphite foam as flexible current collector for electro‐deposition of polyaniline (PANI) nanowires. The graphite foam with PANI was then used to fabricate symmetric supercapacitor. The fabricated supercapacitor in the three‐electrode system shows a high specific capacitance (Csp) of 357 F.g−1 and areal capacitance (Careal) of 7142 mF.cm−2 in 1 M H2SO4 at current density of 80 mA.cm−2, while using two‐electrode system, it shows Csp of 256 F.g−1 and Careal of 5120 mF.cm−2 in 1 M H2SO4 at current density of 100 mA.cm−2. The current density of 100 mA.cm−2 is up to 10 folds higher than reported current densities of many PANI‐based supercapacitors. The high capacitance can be attributed to the spongy network of PANI‐NWs on three‐dimensional graphite surface which provides an easy path for electrolyte ions in active electrode materials. The developed supercapacitor shows specific energy of 64.8 Whkg−1 and a specific power of 6.1 kWkg−1 with a marginally decrease of 1.6% in Csp after 1000th cycles, along with coulombic efficiency retention of 87% in polyvinyl alcohol/H2SO4 gel electrolyte. This flexible supercapacitor exhibits great potential for energy storage application.

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“…86 A similar superior capacitance of 488 and 69 F/g was observed when CNC was used along with polyaniline and poly (3,4-ethylenedioxythiophene) in electrodes as compared to 358 and 58 F/g in the absence of CNC, respectively. 87 To address this conductivity issue, ternary composites of conductive polymer/NC were fabricated where the third phase was mostly graphene or graphite. 88 Electrochemical performance of electrodes can also be improved by incorporating either metal oxide or metal hydroxide to NC-based composites.…”

Section: Nanocellulose-based Composites For Supercapacitorsmentioning

confidence: 99%

Nanocellulose‐based polymer composites for energy applications—A review

Lasrado

Ahankari

Kar

2020

J of Applied Polymer Sci

114

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With rapid fossil fuel consumption and ecological concerns, alternative options of green energy development and its efficient storage technology is an emergent area of research. Nanocellulose is observed to be a very-promising sustainable and environmentally friendly nanomaterial for green and renewable electronics for advanced electrochemical energy conversion/conservation devices. This review begins with a basic introduction on the sources and properties of nanocellulose. It provides an overview of the recent advancements made by researchers in integrating nanocellulose with active materials to form a flexible film/aerogel/3D structures as a substrate for powering portable electronics, electric vehicles, etc. The review highlights the use of nanocellulose-based composites in energy conversion devices such as solar cells, piezoelectric materials, and lithium ion batteries. Recent research shows that the power conversion efficiency of solar cells and the piezoelectric performance of piezoelectric materials can be increased when the matrix is reinforced with nanocellulose. The review also focuses on the updates of nanocellulose-based composites in separators, binders, and electrodes of energy conservation devices such as supercapacitors, and energy capture devices such as CO 2 separators.

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Polyaniline- and poly(ethylenedioxythiophene)-cellulose nanocomposite electrodes for supercapacitors

Cited by 30 publications

References 60 publications

Coumarin and carbazole fluorescently modified cellulose nanocrystals using a one‐step esterification procedure

Coumarin and carbazole fluorescently modified cellulose nanocrystals using a one‐step esterification procedure

Flexible supercapacitor based on three‐dimensional cellulose/graphite/polyaniline composite

Nanocellulose‐based polymer composites for energy applications—A review

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