Carbon nanofibers grown on the surface of graphite felt by chemical vapour deposition for vanadium redox flow batteries

He, Zhangxing; Liu, Lei; Gao, Chao; Zhou, Zhi; Liang, Xinxing; Liu, Ying; He, Zhen; Liu, Suqin

doi:10.1039/c3ra22631j

Cited by 47 publications

(78 citation statements)

References 17 publications

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“…Energy efficiency increased by 4.4% to 85.7% and was reported to be stable over 50 cycles. On the surface of graphite felt CNFs were grown by chemical vapor deposition (CVD) for use as the positive electrode [257]. Compared with pristine graphite felt, increased peak currents and smaller peak separation were found in CVs.…”

Section: Structural Modification Of Carbonmentioning

confidence: 99%

Electrocatalysis at Electrodes for Vanadium Redox 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 Vanadium Redox Flow Batteries

Holze

2018

Batteries

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“…Therefore, the RuO 2 /MWCNT/SSM electrode exhibits the higher anodic and cathodic peak current and the lower ∆E p values, reflecting some improvement in the electrochemical activity towards [VO] 2+ /[VO 2 ] + redox reactions[37,38]. The peak currents due to the redoxprocesses of [VO] 2+ /[VO 2 ] + on the MWCNT/SSM modified with RuO 2 are 88 and -85 mA, respectively, whereas the corresponding peak currents for MWCNT/SSM electrode are 58 and -46 mA, respectively.…”

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confidence: 99%

RuO₂/MWCNT/ stainless steel mesh as a novel positive electrode in vanadium redox flow batteries

Gobal

Faraji

2015

RSC Adv.

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The present work describes the preparation and electrochemical characterization of RuO2/MWCNT/Stainless Steel Mesh (SSM) electrode as compared with a MWCNT/SSM electrode in the positive half-cell of a Vanadium Redox Flow Battery (VRFB). The electrochemical characterization of prepared electrode was carried out using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic charge/discharge procedures. The electrochemical activity of MWCNT/SSM modified with RuO2 as positive electrode in a VRFB was notably improved. The RuO2-included electrodes demonstrated high peak current ratio, small peak potential difference and high electron transfer rate constant, confirming excellent electro-catalytic activity and reversibility. These good electrochemical results, together with the long term stability of the prepared electrode, represent a significant step forward in the development of highly effective positive electrode materials for VRFBs. IntroductionAmong a wide range of energy storage technologies, redox flow batteries (RFB) offer several unique advantages, including the system scalability, long cycle life, and high energy efficiency [1]. RFBs are electrochemical energy storage devices where the energy is stored and converted through chemical changes of species dissolved in a working fluid. Among various kinds of RFB, vanadium RFB (VRFB) consisting of [VO] 2+ /[VO 2 ] + redox couples in the positive electrode and [V] 3+ /[V] +2

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“…Vanadium redox flow batteries (VRFB), proposed by Skyllas‐Kazacos et al., have attracted much interest as a promising ESS due to much predomination such as long life, high efficiency, environmental friendliness . In VRFB system, VO 2+ /VO 2 + and V 2+ /V 3+ redox couples in H 2 SO 4 solution are employed as the positive and negative active species, respectively, which are partitioned by ion‐exchange membrane ,. The same element of active species in different valance states makes the cross‐contamination easy to correct by regeneration of electrolyte .…”

Section: Introductionmentioning

confidence: 99%

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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Carbon nanofibers grown on the surface of graphite felt by chemical vapour deposition for vanadium redox flow batteries

Cited by 47 publications

References 17 publications

Electrocatalysis at Electrodes for Vanadium Redox Flow Batteries

Electrocatalysis at Electrodes for Vanadium Redox Flow Batteries

RuO₂/MWCNT/ stainless steel mesh as a novel positive electrode in vanadium redox flow batteries

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

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Carbon nanofibers grown on the surface of graphite felt by chemical vapour deposition for vanadium redox flow batteries

Cited by 47 publications

References 17 publications

Electrocatalysis at Electrodes for Vanadium Redox Flow Batteries

Electrocatalysis at Electrodes for Vanadium Redox Flow Batteries

RuO2/MWCNT/ stainless steel mesh as a novel positive electrode in vanadium redox flow batteries

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

Contact Info

Product

Resources

About

RuO₂/MWCNT/ stainless steel mesh as a novel positive electrode in vanadium redox flow batteries

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