A Zn(<scp>ClO<sub>4</sub></scp>)<sub>2</sub> Supporting Material for Highly Reversible Zinc–Bromine Electrolytes

Kim, Donghyeon; Jeon, Joonhyeon

doi:10.1002/bkcs.10669

Cited by 16 publications

(7 citation statements)

References 22 publications

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“…A P/S 1400 pump (Thermo Co., Waltham, USA) is used to circulate the electrolyte in the unit cell and controls 6 mL/min . Figure shows the operation of the VRFB used in the work, with the related specification indicated in Table .

The coulombic efficiency ((), CE) = ((), \frac{discharge capacity}{charge capacity}) \times 100

The voltage efficiency ((), VE) = ((), \frac{average discharge voltage}{average charge voltage}) \times 100

The energy efficiency ((), EE) = ((), \frac{CE \times VE}{100})

…”

Section: Methodsmentioning

confidence: 99%

The Correlation Between Charge and Discharge Current for the Electrochemical Stability and Durability of Electrolyte in a Vanadium Redox Flow Battery

Kim

Jeon

2018

Bulletin Korean Chem Soc

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The object of this paper is to simulate electrochemical performances of V-electrolyte employed in the VRFB cell when different charge/discharge current densities are given. Experimental results show that increasing charge(or discharge) current for a given discharge (or charge) current leads to the reduction of both voltaic efficiency and charge(or discharge) capacity as compared to the use of same charge/discharge currents, while resulting in coulombic efficiency improvement. In contrast, the decreasing cases provide the improvement of both the voltaic efficiency and the capacity, but there takes place a serious problem of the capacity fading effect as well as the coulombic efficiency reduction. This is because low charge/discharge current densities causes polarization effects and self-discharges during cyclic operation, resulting in electrochemical instability of electrolyte performance. Consequently, both the charge and discharge current densities have to be employed over 80 mA/cm 2 to keep an electrochemical stability of electrolyte.

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The coulombic efficiency ((), CE) = ((), \frac{discharge capacity}{charge capacity}) \times 100

The voltage efficiency ((), VE) = ((), \frac{average discharge voltage}{average charge voltage}) \times 100

The energy efficiency ((), EE) = ((), \frac{CE \times VE}{100})

…”

Section: Methodsmentioning

confidence: 99%

The Correlation Between Charge and Discharge Current for the Electrochemical Stability and Durability of Electrolyte in a Vanadium Redox Flow Battery

Kim

Jeon

2018

Bulletin Korean Chem Soc

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“…[94] Various additives, such as KCl, Zn(ClO 4 ) 2 , and NH 4 Cl, have been used to improve the electrochemical performance of ZnBr 2 electrolytes. [62,95,96] Toxic and corrosive Br 2 gas may be formed during charging/discharging, and it can crossover to anodes to corrode Zn metal electrodes. Thus, complexation agents have been used to minimize the formation of Br 2 gas.…”

Section: Challenges Of Electrolytesmentioning

confidence: 99%

Zinc–Bromine Batteries: Challenges, Prospective Solutions, and Future

Mahmood,

Zheng,

Chen

2023

Advanced Science

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Zinc‐bromine batteries (ZBBs) have recently gained significant attention as inexpensive and safer alternatives to potentially flammable lithium‐ion batteries. Zn metal is relatively stable in aqueous electrolytes, making ZBBs safer and easier to handle. However, Zn metal anodes are still affected by several issues, including dendrite growth, Zn dissolution, and the crossover of Br species from cathodes to corrode anodes, resulting in self‐discharge and fast performance fading. Similarly, Br2 undergoes sluggish redox reactions on cathodes, which brings several issues such as poor reaction kinetics, the highly corrosive nature of Br species leading to corrosion of separators and poisoning of anodes, and the volatile nature of Br species causing increased internal pressures, etc. These issues are compounded in flowless ZBB configuration as no fresh electrolyte is available to provide extra/fresh reaction species. In this review, the factors controlling the performance of ZBBs in flow and flowless configurations are thoroughly reviewed, along with the status of ZBBs in the commercial sector. The review also summarizes various novel methodologies to mitigate these challenges and presents research areas for future studies. In summary, this review will offer a perspective on the historical evolution, recent advancements, and prospects of ZBBs.

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“…The SF600 membrane (produced by Asahi Kasei Co., Tokyo, Japan) is a porous separator with low bromine transport rate (3.4 × 10 −9 mol Br 2 cm −2 s −1 ) and resistivity (1.28 Ω cm). [ 67 ] The microporous plastic polyolefins Daramic and Entek are other commonly used separators for ZBFBs. [ 68 ]…”

Section: Advanced Materials For Zbfbsmentioning

confidence: 99%

Scientific issues of zinc‐bromine flow batteries and mitigation strategies

et al. 2023

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Zinc‐bromine flow batteries (ZBFBs) are promising candidates for the large‐scale stationary energy storage application due to their inherent scalability and flexibility, low cost, green, and environmentally friendly characteristics. ZBFBs have been commercially available for several years in both grid scale and residential energy storage applications. Nevertheless, their continued development still presents challenges associated with electrodes, separators, electrolyte, as well as their operational chemistry. Therefore, rational design of these components in ZBFBs is of utmost importance to further improve the overall device performance. In this review, the focus is on the scientific understanding of the fundamental electrochemistry and functional components of ZBFBs, with an emphasis on the technical challenges of reaction chemistry, development of functional materials, and their application in ZBFBs. Current limitations of ZBFBs with future research directions in the development of high performance ZBFBs are suggested.

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A Zn(ClO₄)₂ Supporting Material for Highly Reversible Zinc–Bromine Electrolytes

Cited by 16 publications

References 22 publications

The Correlation Between Charge and Discharge Current for the Electrochemical Stability and Durability of Electrolyte in a Vanadium Redox Flow Battery

The Correlation Between Charge and Discharge Current for the Electrochemical Stability and Durability of Electrolyte in a Vanadium Redox Flow Battery

Zinc–Bromine Batteries: Challenges, Prospective Solutions, and Future

Scientific issues of zinc‐bromine flow batteries and mitigation strategies

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A Zn(ClO4)2 Supporting Material for Highly Reversible Zinc–Bromine Electrolytes

Cited by 16 publications

References 22 publications

The Correlation Between Charge and Discharge Current for the Electrochemical Stability and Durability of Electrolyte in a Vanadium Redox Flow Battery

The Correlation Between Charge and Discharge Current for the Electrochemical Stability and Durability of Electrolyte in a Vanadium Redox Flow Battery

Zinc–Bromine Batteries: Challenges, Prospective Solutions, and Future

Scientific issues of zinc‐bromine flow batteries and mitigation strategies

Contact Info

Product

Resources

About

A Zn(ClO₄)₂ Supporting Material for Highly Reversible Zinc–Bromine Electrolytes