Boosting vanadium flow battery performance by Nitrogen-doped carbon nanospheres electrocatalyst

Wu, Lantao; Shen, Yi; Yu, Lihong; Xi, Jingyu; Qiu, Xinping

doi:10.1016/j.nanoen.2016.08.025

Cited by 204 publications

(138 citation statements)

References 56 publications

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“…On the other hand, pyrrolic N is formed by incorporation of the nitrogen atoms into the five‐membered ring in the graphite, and the pyridinic N can be explained by the chemical bonding between the nitrogen atom and the two neighbor sp 2 carbon atoms at the edge or defects of the graphitic plane . Note that pyridinic N could be an excellent electrocatalyst for vanadium redox reaction in VRFBs . It is widely accepted that the carbon atoms adjacent to the nitrogen dopants have a considerably high positive charge density to counterbalance the strong electronic affinity of the nitrogen atom based on the density functional calculation .…”

Section: Resultsmentioning

confidence: 99%

“…It is widely accepted that the carbon atoms adjacent to the nitrogen dopants have a considerably high positive charge density to counterbalance the strong electronic affinity of the nitrogen atom based on the density functional calculation . As a result, the negatively charged N atom, the edge or defective sites of the graphitic plane, can promote adsorption of positively charged vanadium ions and play the role of the electrocatalyst for the vanadium ion redox reaction . With an increase in the temperature for direct nitradation, the amount of pyridinic N increased from 17.25 (for 650‐N doped GF) to 30.55% (for 850‐N doped GF) as shown in Table .…”

Section: Resultsmentioning

confidence: 99%

“…Recently, nitrogen‐doped carbon materials have been investigated as electrode materials for VRFBs because doped nitrogen atoms in carbon materials can act as effective electrocatalysts for the electrochemical reaction of vanadium ion redox couples . By improving the charge transfer kinetics for redox reactions of vanadium ions, Park et al .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Direct Nitradated Graphite Felt as an Electrode Material for the Vanadium Redox Flow Battery

Kim

Chung

Park

et al. 2018

Bulletin Korean Chem Soc

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The vanadium redox flow battery (VRFB) is one of the most promising electrochemical energy storage systems for grid support. However, the electrochemical performance of the VRFB should be further improved for successful penetration into the large‐scale energy storage system market. Among all the components of the VRFB, the electrode, which provides an active site for the vanadium ion redox reaction, plays an important role in determining the electrochemical properties of the VRFB. In this work, nitrogen‐doped graphite felts prepared via a direct nitridation route using NH3 were investigated as electrode materials for the VRFB. The resulting N‐doped graphite felt electrode showed much improved voltage efficiency and energy efficiency of 87.1 and 85.0%, respectively, compared to those of pristine graphite felt (82.13 and 79.6%, respectively). These improvements can be attributed to doped nitrogen atoms in the graphite felt electrode acting as an efficient electrocatalyst for the vanadium redox reaction in a VRFB system.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Direct Nitradated Graphite Felt as an Electrode Material for the Vanadium Redox Flow Battery

Kim

Chung

Park

et al. 2018

Bulletin Korean Chem Soc

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“…However, it was also shown that this standard electrode material (carbon felt/carbon nonwoven) has to be activated in order to provide an acceptable catalytic activity for vanadium ion redox conversion, and even in this case further improvement is desired to overcome kinetic limitations, as detailed above. Thus, recent research focusses on the investigation of catalytically active carbon material, such as carbon fibres, carbon nanotubes, mesoporous carbon, carbon nanospheres, and more.…”

Section: Introductionmentioning

confidence: 99%

Titanium as a Substrate for Three‐Dimensional Hybrid Electrodes for Vanadium Redox Flow Battery Applications

Fan

Steimecke

et al. 2020

ChemElectroChem

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Titanium, either in the form of a Ti foil or in form of a Ti mesh, was used as a novel substrate to grow nitrogen‐doped carbon nanotubes (NCNTs) through chemical vapor deposition at moderate temperatures over electrodeposited iron particles. The thus‐prepared high‐surface‐area electrodes were characterized by scanning electron microscopy (SEM), Raman spectroscopy, and X‐ray photoelectron spectroscopy (XPS). The electrochemical performance towards the V(IV)/V(V) redox couple was investigated by cyclic voltammetry. The parameters for iron particle electrodeposition were adjusted towards high and uniform substrate coverage. Nanotube growth from acetonitrile at moderate temperatures (600 °C) led to N‐containing CNTs with a high amount of graphitic nitrogen. NCNTs grown over Ti substrates provide promising performances towards the V(IV)/V(V) as well as the V(III)/V(IV) redox pair. In general, the results of this study show that Ti might be a suitable electrocatalyst substrate for various applications in electrochemical energy conversion.

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“…As such, large-scale stationary energy storage has received extensive attention in the rapidly changing energy market because it can be used to integrate energy generated from renewable resources also provide many critical grid services, such as frequency regulation, peak shaving, back-up power, and transmission and distribution deferral. [1,[3][4][5][6][7] Because of its safety and design flexibility from decoupled power to energy, redox flow battery technology has been recognized as a promising approach for grid energy storage. [8] Among different redox flow battery systems, the vanadium redox flow battery (VRFB) is the most highly developed, and it provides significant benefits such as long cycle life, modular design, and low cost potential.…”

mentioning

confidence: 99%

Monitoring the State‐of‐Charge of a Vanadium Redox Flow Battery with the Acoustic Attenuation Coefficient: An In Operando Noninvasive Method

et al. 2019

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Redox flow battery technology has been increasingly recognized as a promising option for large‐scale grid energy storage. Access to high‐fidelity information on the health status of the electrolyte, including the state‐of‐charge (SOC), is vital to maintaining optimal and economical battery operation. In this study, an ultrasonic probing cell that can be used to measure SOC in real time is designed. This unprecedented, new measurement approach overcomes the influence of varying temperatures by measuring the acoustic attenuation coefficient of the redox flow battery electrolyte online and noninvasively. The new approach is used to estimate the SOC of a vanadium redox flow battery in operando from measured acoustic properties. The accuracy of the SOC estimated from the acoustic properties is validated against SOC calculated by the titration method. The results show that the acoustic attenuation coefficient is a robust parameter for SOC monitoring, with a maximum error of 4.8% and extremely low sensitivity to temperature, while sound speed appears to be less accurate in the benchmark‐inference method, with a maximum error of 22.5% and high sensitivity to temperature. The acoustic measurement approach has great potential for inexpensive real‐time SOC monitoring of redox flow battery operations.

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Boosting vanadium flow battery performance by Nitrogen-doped carbon nanospheres electrocatalyst

Cited by 204 publications

References 56 publications

Direct Nitradated Graphite Felt as an Electrode Material for the Vanadium Redox Flow Battery

Direct Nitradated Graphite Felt as an Electrode Material for the Vanadium Redox Flow Battery

Titanium as a Substrate for Three‐Dimensional Hybrid Electrodes for Vanadium Redox Flow Battery Applications

Monitoring the State‐of‐Charge of a Vanadium Redox Flow Battery with the Acoustic Attenuation Coefficient: An In Operando Noninvasive Method

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