Graphene oxide nanosheets/polymer binders as superior electrocatalytic materials for vanadium bromide redox flow batteries

Rui, Xianhong; Oo, Moe Ohnmar; Sim, Dao Hao; Raghu, S.; Yan, Qingyu; Lim, Tuti Mariana; Skyllas‐Kazacos, Maria

doi:10.1016/j.electacta.2012.08.119

Cited by 38 publications

(15 citation statements)

References 33 publications

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“…Among these, carbon materials show good potential in bromine‐based batteries due to their good inertness to corrosive media, high activity, and low cost. Various carbon materials, such as carbon gels, carbon nanotubes, active carbon, graphene oxide, etc., have been investigated as the bromine electrode in various bromine‐based flow batteries. The results demonstrate that some carbon materials indeed possess high activity to Br 2 /Br − and improve the Br 2 /Br − kinetics.…”

Section: Specific Surface Area Of Cs Hcs and Cpc And The Kinetics Pamentioning

confidence: 99%

Cage‐Like Porous Carbon with Superhigh Activity and Br₂‐Complex‐Entrapping Capability for Bromine‐Based Flow Batteries

et al. 2017

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Bromine-based flow batteries receive wide attention in large-scale energy storage because of their attractive features, such as high energy density and low cost. However, the Br diffusion and relatively low activity of Br /Br hinder their further application. Herein, a cage-like porous carbon (CPC) with specific pore structure combining superhigh activity and Br -complex-entrapping capability is designed and fabricated. According to the results of density functional theory (DFT) calculation, the pore size of the CPC (1.1 nm) is well designed between the size of Br (4.83 Å), MEP (9.25 Å), and Br complex (MEPBr 12.40 Å), wherein Br is oxidized to Br , which forms a Br complex with the complexing agent immediately and is then entrapped in the cage via pore size exclusion. In addition, the active sites produced during the carbon dioxide activation process dramatically accelerate the reaction rate of Br /Br . In this way, combining a high Br -entrapping-capability and high specific surface areas, the CPC shows very impressive performance. The zinc bromine flow battery assembled with the prepared CPC shows a Coulombic efficiency of 98% and an energy efficiency of 81% at the current density of 80 mA cm , which are among the highest values ever reported.

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Section: Specific Surface Area Of Cs Hcs and Cpc And The Kinetics Pamentioning

confidence: 99%

Cage‐Like Porous Carbon with Superhigh Activity and Br₂‐Complex‐Entrapping Capability for Bromine‐Based Flow Batteries

et al. 2017

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“…Few layered graphene oxide nanosheets were attached with a binder (PVDF, poly(ether ether ketone) PEEK etc.) to a graphite plane for examination as an electrode in various RFBs including the positive and negative VRFB electrodes [280]. The best performance was observed when using PEEK as a binder.…”

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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“…Initial ideas regarding catalytic effects were based on glassy carbon modified with carbon nanotubes [95] and with graphene oxide/polymer composite electrodes. [96] Although complexing agents (QBr) have been used for over 40 years for bromine complexation, the electrochemical properties of Br 2 /Br À have only recently been studied. In addition to the storage of bromine,QBr promotes the specific adsorption of bromide at the carbon/polymer composite electrode,t hus accelerating the Br 2 /Br À reaction.…”

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confidence: 99%

The Chemistry of Redox‐Flow Batteries

et al. 2015

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The development of various redox-flow batteries for the storage of fluctuating renewable energy has intensified in recent years because of their peculiar ability to be scaled separately in terms of energy and power, and therefore potentially to reduce the costs of energy storage. This has resulted in a considerable increase in the number of publications on redox-flow batteries. This was a motivation to present a comprehensive and critical overview of the features of this type of batteries, focusing mainly on the chemistry of electrolytes and introducing a thorough systematic classification to reveal their potential for future development.

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Graphene oxide nanosheets/polymer binders as superior electrocatalytic materials for vanadium bromide redox flow batteries

Cited by 38 publications

References 33 publications

Cage‐Like Porous Carbon with Superhigh Activity and Br₂‐Complex‐Entrapping Capability for Bromine‐Based Flow Batteries

Cage‐Like Porous Carbon with Superhigh Activity and Br₂‐Complex‐Entrapping Capability for Bromine‐Based Flow Batteries

Electrocatalysis at Electrodes for Vanadium Redox Flow Batteries

The Chemistry of Redox‐Flow Batteries

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Graphene oxide nanosheets/polymer binders as superior electrocatalytic materials for vanadium bromide redox flow batteries

Cited by 38 publications

References 33 publications

Cage‐Like Porous Carbon with Superhigh Activity and Br2‐Complex‐Entrapping Capability for Bromine‐Based Flow Batteries

Cage‐Like Porous Carbon with Superhigh Activity and Br2‐Complex‐Entrapping Capability for Bromine‐Based Flow Batteries

Electrocatalysis at Electrodes for Vanadium Redox Flow Batteries

The Chemistry of Redox‐Flow Batteries

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Product

Resources

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Cage‐Like Porous Carbon with Superhigh Activity and Br₂‐Complex‐Entrapping Capability for Bromine‐Based Flow Batteries

Cage‐Like Porous Carbon with Superhigh Activity and Br₂‐Complex‐Entrapping Capability for Bromine‐Based Flow Batteries