Excellent electrocatalytic effects of tin through in situ electrodeposition on the performance of all-vanadium redox flow batteries

Mehboob, Sheeraz; Mehmood, Asad; Lee, Juyoung; Shin, Hyun-Jin; Hwang, Jun Gi; Abbas, Saleem; Ha, Heung Yong

doi:10.1039/c7ta05657e

Cited by 69 publications

(43 citation statements)

References 54 publications

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“…As discussed previously, this method for calculation of the surface area may not be accurate since the Randles–Sevick equation is applicable only to planar electrodes involving semifinite diffusion of the electroactive species and is not applicable to porous electrodes. Nevertheless, the battery operated at 150 mA cm −2 achieved a VE and EE of 79.7% and 77.3%, respectively, comparable to the values obtained previously at this current density when a Sn metal catalyst was used at both electrodes by the same group [ 75 ] (see Section 2.3.6)…”

Section: All‐vanadium Rfbsupporting

confidence: 85%

“…In order to avoid the long and complex pretreatment steps, the approach in some studies has been to add the metallic ion of the desired catalyst directly to the electrolyte in the battery itself. [ 73–76 ] The metallic ions must have an electrode potential that allows them to be deposited on the electrode surface during charge before the V(II)/V(III) or V(IV)/V(V) redox reactions can begin. Depending on the electrode potential of the catalyst, the metal may dissolve back into the electrolyte during discharge.…”

Section: All‐vanadium Rfbmentioning

confidence: 99%

“…[ 146 ] It is also relatively resistant to corrosion and can increase the wettability of the electrode. [ 75 ] For these reasons, Mehboob et al [ 75 ] adopted a similar approach that Li et al [ 85 ] had previously used for Sb and added either Sn 2+ (as SnCl 2 salt) or Sn 4+ (SnCl 4 ) to both the negative and positive electrolytes of a VRFB and investigated their effect on the electrochemical performance of the V(II)/V(III) and V(IV)/V(V) reactions. As shown in Figure 10, the standard electrode potential of the Sn/Sn 2+ couple is −0.13 V SHE, which is close to that of V 2+ /V 3+ (−0.26 V SHE).…”

Section: All‐vanadium Rfbmentioning

confidence: 99%

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Metal and Metal Oxide Electrocatalysts for Redox Flow Batteries

Amini

Gostick

Pritzker

2020

Adv Funct Materials

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Redox flow batteries (RFBs) are one of the promising technologies for large‐scale energy storage applications. For practical implementation of RFBs, it is of great interest to improve their efficiency and reduce their cost. One of the key components of RFBs that can greatly influence the efficiency and final cost is the electrode. The chemical and structural nature of electrodes can modify the kinetics of redox reactions and the accessibility of the electroactive species to available active sites. The ideal electrocatalyst for RFBs must have good activity for the desirable redox reaction, provide a high surface area, and exhibit sufficient conductivity and durability over repeated use. One strategy is to coat the electrode with metal and metal oxide electrocatalysts. Metal electrocatalysts have the advantage of high conductivity, while metal oxide catalysts are usually less expensive and so more economically attractive. In order to gain a better understanding of the performance of the electrocatalysts in RFBs, a comprehensive review of the progress in the development of metal and metal oxide electrocatalysts for RFBs is provided and a critical comparison of the latest developments is presented. Finally, practical recommendations for advancement of electrocatalysts and effective transfer of knowledge in this field are provided.

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Section: All‐vanadium Rfbsupporting

confidence: 85%

Section: All‐vanadium Rfbmentioning

confidence: 99%

Section: All‐vanadium Rfbmentioning

confidence: 99%

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Metal and Metal Oxide Electrocatalysts for Redox Flow Batteries

Amini

Gostick

Pritzker

2020

Adv Funct Materials

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“…However,t he low solubility and conductivity of organic solvents for non-aqueous RFBs result in lower capacities, energy densities, and potentials than expected. [7,8] However,t hese commercial aqueous RFBs still suffer from limitations of solubility, [6,9,10] poor kinetics, [11][12][13][14][15] and crossover issues [16][17][18][19] that must be resolved. In contrast, aqueous materials are relatively safe and easy to handle.…”

Section: Introductionmentioning

confidence: 99%

Neutral Red and Ferroin as Reversible and Rapid Redox Materials for Redox Flow Batteries

Hong

Kim

2018

ChemSusChem

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Neutral red and ferroin are used as redox indicators (RINs) in potentiometric titrations. The rapid response and reversibility that are prerequisites for RINs are also desirable properties for the active materials in redox flow batteries (RFBs). This study describes the electrochemical properties of ferroin and neutral red as a redox pair. The rapid reaction rates of the RINs allow a cell to run at a rate of 4 C with 89 % capacity retention after the 100 cycle. The diffusion coefficients, electrode reaction rates, and solubilities of the RINs were determined. The electron-transfer rate constants of ferroin and neutral red are 0.11 and 0.027 cm s , respectively, which are greater than those of the components of all-vanadium and Zn/Br cells.

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“…Tin deposited from SnCl 2 added to the electrolyte solution was found to be effective at the negative electrode, but at the positive electrode acceleration of the oxidation reaction was barely noticed [394]. An energy efficiency of 89.3% was reported.…”

Section: Foreign Metal Depositsmentioning

confidence: 95%

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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Excellent electrocatalytic effects of tin through in situ electrodeposition on the performance of all-vanadium redox flow batteries

Abstract: The impact on the performance of all-vanadium redox flow batteries by tin as an electrocatalyst through in situ electrodeposition is investigated.

Cited by 69 publications

References 54 publications

Metal and Metal Oxide Electrocatalysts for Redox Flow Batteries

Metal and Metal Oxide Electrocatalysts for Redox Flow Batteries

Neutral Red and Ferroin as Reversible and Rapid Redox Materials for Redox Flow Batteries

Electrocatalysis at Electrodes for Vanadium Redox Flow Batteries

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