Insight into potential oscillation behaviors during Zn electrodeposition: Mechanism and inspiration for rechargeable Zn batteries

He, Yunhui; Cui, Yifan; Shang, Wenxu; Zhao, Zhiwei; Tan, Peng

doi:10.1016/j.cej.2022.135541

Cited by 36 publications

(13 citation statements)

References 45 publications

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“…The reason for the large gap between the theoretical value and the real value is the high overpotential of the ORR and OER reaction in the air electrode. The huge voltage gap between charging and discharging leads to the low round‐trip energy efficiency of ZABs (55%–65%) 35 . Consequently, it is essential to develop highly active bifunctional catalysts to cut down the overpotential in the oxygen‐catalyzed reaction processes, thus boosting energy efficiency.…”

Section: The Working Principle Of Zabsmentioning

confidence: 99%

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Nonnoble metal oxides for high‐performance Zn‐air batteries: Design strategies and future challenges

Zheng

Zhang

et al. 2022

Asia-Pacific J Chem Eng

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Nowadays, the increasing demand for safe, clean, and renewable energies has inspired scientists to do massive research on rechargeable Zn-air batteries (ZABs). Thanks to its inherent high theoretical energy density, ZABs have become one of the excellent candidates for the new generation of electric transportations and electrical energy storage systems. Nevertheless, the most significant technical obstacle to the commercialization of ZABs is the tardy oxygen reduction reaction and oxygen evolution reaction (ORR and OER) kinetics of the air electrode. Hence, the development of bifunctional electrocatalysts with advanced ORR/OER catalytic activity and long-term stability is of great significance. Owing to the outstanding advantages of perovskite oxides, scientists have focused their attention on the perovskite-based catalysts. And various strategies have been applied to strengthen their ORR/OER performance, including cation doping, surface structure optimization, nanostructure construction, and composite fabrication. This article concisely outlines the research progress of perovskite-based oxides on ZABs applications. The basic principles of ZABs and the approach to increasing the OER/ORR activity of perovskite oxides as the air electrode of ZABs are illustrated. Finally, this review points out opportunities, possibilities, and future development direction of perovskite-based air electrodes.

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Section: The Working Principle Of Zabsmentioning

confidence: 99%

“…The huge voltage gap between charging and discharging leads to the low round-trip energy efficiency of ZABs (55%-65%). 35 Consequently, it is essential to develop highly active bifunctional catalysts to cut down the overpotential in the oxygen-catalyzed reaction processes, thus boosting energy efficiency.…”

Section: The Working Principle Of Zabsmentioning

confidence: 99%

Nonnoble metal oxides for high‐performance Zn‐air batteries: Design strategies and future challenges

Zheng

Zhang

et al. 2022

Asia-Pacific J Chem Eng

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“…Zn-based batteries have attracted increasing attention in recent years due to their high theoretical capacity, low cost, and inherent safety of being able to work in aqueous systems. − However, a series of problems exist in operation, such as passivation during discharge and dendrites and hydrogen evolution during charging, which seriously reduces the capacity and affects the cycle stability and safety. − In recent years, various approaches have been taken by researchers to enhance the cycling stability of Zn electrodes and suppress dendrites . In aqueous solutions, the main methods to solve the dendrite issue include electrolyte additives, artificial solid electrolyte interface films on the Zn surface, electrode structure redesign, and charge–discharge strategies. − For example, a cationic surfactant-type electrolyte additive is proposed to result in homogeneous Zn deposition via the unique Znophobic repulsion mechanism, of which the capacity retention rate can reach 94% after 300 cycles at 1 A g –1 .…”

Section: Introductionmentioning

confidence: 99%

Tailoring the Electrochemical Deposition of Zn by Tuning the Viscosity of the Liquid Electrolyte

Cui

et al. 2023

ACS Appl. Mater. Interfaces

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The issues during Zn deposition in rechargeable Zn-based batteries greatly hinder cycling stability. In this work, a simple and inexpensive approach to tailor the Zn electrodeposition is proposed by tuning the viscosity of the liquid electrolyte (LE). First, the growth mechanisms of Zn deposition under different electrolyte properties are investigated by numerical simulation, from which the bottom deposition tends to fuse with each other when there are more deposition sites, and the mass-transfer coefficient is lower, thus achieving uniform deposition. Besides, the whole process of Zn deposition in charging–discharging cycling is in situ observed by an optical microscope. It is found that the cause of the poor stability in the LE is due to the uneven Zn deposition, resulting in weak bonding between the deposition and the electrode surface, which is also the reason for the formation of dead Zn. In contrast, when an appropriate amount of the polymer is added to the LE to increase the viscosity, an appropriate overpotential can be created, generating more deposition sites. In addition, the viscosity reduces the mass-transfer coefficient, making the distance from the ion to the deposition sites the main controlling factor. The Zn ions are more inclined to move in the direction of electric field lines, which results in a uniform and dense deposition layer. Furthermore, the effectiveness of this method is demonstrated in a Zn–LiFePO4 battery, from which the battery with the modified electrolyte condition still works properly even in the Zn utilization of 100% and shows a capacity retention rate (35%) of nearly twice that in the original LE condition (18%) after 10 cycles. This work provides a theoretical basis for Zn deposition and provides ideas for the future development of high-performance Zn-based batteries.

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“…[11,12] During the past decade, there are plenty of investigations on the flow field and electrode optimization. [13,14] Yang et al [15] established a 2D computational model of VRFB and found the way of variable flow rate can improve the overall properties of battery. In hydrogen-bromine flow battery, Kyeongmin Oh et al [16] discussed flow-through and flow-by cases, which proposed that flow-through case can achieve better battery performance due to more uniform diffusion of key species.…”

Section: Introductionmentioning

confidence: 99%

“…It is well accepted that the mass transfer of flow batteries based on initial concentration, inlet velocity and flow field can influence the battery performance [11,12] . During the past decade, there are plenty of investigations on the flow field and electrode optimization [13,14] . Yang et al [15] .…”

Section: Introductionmentioning

confidence: 99%

Mass Transfer Characteristic Analysis and Optimization of Flow Field for Neutral Organic Redox Flow Battery Based on 1‐DPAQCl

et al. 2022

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A novel negative electrolyte for organic redox flow battery has been synthesized, which has higher solubility in neutral solution. In order to promote the commercialization of the novel electrolyte(1-DPAQCl), a series of optimization should be carried out, in which the first is the operating conditions and mass transfer. A 3D steady state finite element model was established, which was compared with a lot of experimental data. The effects of only increasing the positive concentrations and only increasing the negative concentrations on the battery behaviors have been analyzed and the results showed that the setting of only increasing the positive concentrations can improve the discharge voltage up to 1.8 % and decrease the charging voltage by 1.21 %. The battery performances under four flow fields were investigated based on this model and the concentration uniformity factor of the four flow design were obtained. The results presented that the charge-discharge voltages of the interdigital flow field (IFF) was the best, which was followed by the rotary flow field (RFF) and serpentine flow field (SFF), the parallel flow field (PFF) was worst. The uniformity factors of IFF were 23.5 % higher than that of PFF and 12.5 % higher than that of SFF.

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Insight into potential oscillation behaviors during Zn electrodeposition: Mechanism and inspiration for rechargeable Zn batteries

Cited by 36 publications

References 45 publications

Nonnoble metal oxides for high‐performance Zn‐air batteries: Design strategies and future challenges

Nonnoble metal oxides for high‐performance Zn‐air batteries: Design strategies and future challenges

Tailoring the Electrochemical Deposition of Zn by Tuning the Viscosity of the Liquid Electrolyte

Mass Transfer Characteristic Analysis and Optimization of Flow Field for Neutral Organic Redox Flow Battery Based on 1‐DPAQCl

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