Fabrication of Freestanding Sheets of Multiwalled Carbon Nanotubes (Buckypapers) for Vanadium Redox Flow Batteries and Effects of Fabrication Variables on Electrochemical Performance

Mustafa, Ibrahim; Lopez, Ivan Joel; Younes, Hammad; Susantyoko, Rahmat Agung; Al‐Rub, Rashid K. Abu; Almheiri, Saif

doi:10.1016/j.electacta.2017.01.186

Cited by 53 publications

(31 citation statements)

References 53 publications

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“…Improved electrochemical performance was ascribed to this increased surface and improved electronic conductance. Using a vacuum filtration method, freestanding bucky paper electrodes were prepared from MWCNTs and tested for both VRFB electrodes [274]. Preparation parameters such as amount of surfactant and sonication time were varied.…”

Section: Structural Modification Of Carbonmentioning

confidence: 99%

Electrocatalysis at Electrodes for VanadiumRedox Flow Batteries

Holze

2018

Batteries

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Flow batteries (also: redox batteries or redox flow batteries RFB) are briefly introduced as systems for conversion and storage of electrical energy into chemical energy and back. Their place in the wide range of systems and processes for energy conversion and storage is outlined. Acceleration of electrochemical charge transfer for vanadium-based redox systems desired for improved performance efficiency of these systems is reviewed in detail; relevant data pertaining to other redox systems are added when possibly meriting attention. An attempt is made to separate effects simply caused by enlarged electrochemically active surface area and true (specific) electrocatalytic activity. Because this requires proper definition of the experimental setup and careful examination of experimental results, electrochemical methods employed in the reviewed studies are described first.

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Section: Structural Modification Of Carbonmentioning

confidence: 99%

Electrocatalysis at Electrodes for VanadiumRedox Flow Batteries

Holze

2018

Batteries

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“…This route was used successfully beforehand for the immobilization of some other transition metal complexes (e. g. Mn, Re, Fe, Co, Ni, or Cu) on carbon‐based electrodes ,. Compared to the CF‐MWCNT composite, a BP electrode is prepared by filtering the MWCNT solution without using CF as substrate . This approach circumvents the low adhesion of MWCNT on CF, so enhancing the longevity of the prepared electrode.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Biosynthesis using a Bucky Paper Functionalized by [Cp*Rh(bpy)Cl]⁺ and a Renewable Enzymatic Layer

et al. 2018

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A bioelectrode for electroenzymatic synthesis was prepared, combining a layer for NADH regeneration and a renewable layer for enzymatic substrate reduction. The covalent immobilization of a rhodium complex mediator ([Cp*Rh(bpy)Cl] + ) on the surface of a bucky paper electrode was achieved by following an original protocol in two steps. A bipyridine ligand was first grafted on the electrode by electro-reduction of bipyridyl diazonium cations generated from 4-amino-2,2'-bipyridine, and the complex was then formed by reaction with [RhCp*Cl 2 ] 2 . A turnover frequency of 1.3 s À1 was estimated for the electrocatalytic regeneration of NADH by this immobilized complex, with a Faraday efficiency of 83 %. The bucky paper electrode was then overcoated by a bio-doped porous layer made of glassy fibers with immobilized D-sorbitol dehydrogenase. This assembly allowed for the efficient separation of the enzyme and the rhodium catalyst, which is a prerequisite for effective bioelectrocatalysis with such bioelectrochemical system, while allowing effective mass transport of NAD + /NADH cofactor from one layer to the other. Thereby, it was possible to reuse the same mediator-functionalized bucky paper with three different enzyme layers. The bioelectrode was applied to the electroenzymatic reduction of D-fructose to D-sorbitol. A turnover frequency of 0.19 s À1 for the rhodium complex was observed in the presence of 3 mM D-fructose and a total turnover number higher than 12000 was estimated.

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“…prepared graphene oxide nanosheet/CNTs hybrid with outstanding electrocatalytic properties towards VO 2+ /VO 2 + redox couple for VRFB due to formation of effective mixed conducting network. Almheiri et al . proposed freestanding sheet of CNTs (buckypaper) as bifunctional electrode for VRFB, eliminating the need for carbon substrate.…”

Section: Introductionmentioning

confidence: 65%

Phosphorus Doped Multi‐Walled Carbon Nanotubes: An Excellent Electrocatalyst for the VO²⁺/VO₂⁺ Redox Reaction

Jiang

Zhu

et al. 2018

ChemElectroChem

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In this paper, phosphorus doped (P doped) multi‐walled carbon nanotubes (CNTs) were prepared and investigated as catalyst for VO2+/VO2+ redox reaction for vanadium redox flow batteries (VRFB). X‐ray photoelectron spectroscopy (XPS) confirms the equable incorporation of P atoms into carbon layers of the CNTs, and that P doping has no obvious effect on the morphologies of the CNTs. The results of cyclic voltammetry and electrochemical impedance spectroscopy indicate that the electrocatalytic properties of the CNTs are significantly enhanced for the VO2+/VO2+ redox couple by P doping. The sample treated at 800 °C (CNTs‐P8) exhibits the highest electrocatalytic activity, with two times higher peak currents for the redox reaction catalyzed by CNTs‐P8 deposited on glassy carbon than for pristine CNTs. A dynamic cell using the CNTs‐P8 catalyst for VO2+/VO2+ redox couple was assembled and the cell performance was evaluated. This cell exhibits better electrochemical properties including higher discharge capacity and energy efficiency, especially at high current density. The average energy efficiency of the cell for 50 cycles increases by 4.2 % at 50 mA cm−2 by using CNTs‐P8. This study demonstrates that the P doped CNTs are an efficient and promising catalyst material for VO2+/VO2+ redox reaction in VRFB systems.

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Fabrication of Freestanding Sheets of Multiwalled Carbon Nanotubes (Buckypapers) for Vanadium Redox Flow Batteries and Effects of Fabrication Variables on Electrochemical Performance

Cited by 53 publications

References 53 publications

Electrocatalysis at Electrodes for VanadiumRedox Flow Batteries

Electrocatalysis at Electrodes for VanadiumRedox Flow Batteries

Electrocatalytic Biosynthesis using a Bucky Paper Functionalized by [Cp*Rh(bpy)Cl]⁺ and a Renewable Enzymatic Layer

Phosphorus Doped Multi‐Walled Carbon Nanotubes: An Excellent Electrocatalyst for the VO²⁺/VO₂⁺ Redox Reaction

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Fabrication of Freestanding Sheets of Multiwalled Carbon Nanotubes (Buckypapers) for Vanadium Redox Flow Batteries and Effects of Fabrication Variables on Electrochemical Performance

Cited by 53 publications

References 53 publications

Electrocatalysis at Electrodes for VanadiumRedox Flow Batteries

Electrocatalysis at Electrodes for VanadiumRedox Flow Batteries

Electrocatalytic Biosynthesis using a Bucky Paper Functionalized by [Cp*Rh(bpy)Cl]+ and a Renewable Enzymatic Layer

Phosphorus Doped Multi‐Walled Carbon Nanotubes: An Excellent Electrocatalyst for the VO2+/VO2+ Redox Reaction

Contact Info

Product

Resources

About

Electrocatalytic Biosynthesis using a Bucky Paper Functionalized by [Cp*Rh(bpy)Cl]⁺ and a Renewable Enzymatic Layer

Phosphorus Doped Multi‐Walled Carbon Nanotubes: An Excellent Electrocatalyst for the VO²⁺/VO₂⁺ Redox Reaction