The optimization of electrolyte flow management to increase the performance of Zn–air fuel cells

Yang, Cheng‐Jung; Chen, Po‐Tuan; Huang, Keyong

doi:10.1002/er.5052

Cited by 8 publications

(7 citation statements)

References 41 publications

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“…However, DHPS exhibited a considerably higher Complementary Operation Parameter Optimization. Other than developing new cell configurations, the operation parameters, such as the electrolyte flow rate and charging protocols, also have a profound influence on battery performance but often are complementary to a specific cell configuration, such as primary ZAFC, 126,127 charge−discharge-decoupled ZAFB, 115 and slurry-type ZAFB with a cylindrical 116,118 or planar module. 117,128 Despite the diverse cell configurations, there are still some common understandings.…”

Section: ■ Reaction Engineeringmentioning

confidence: 99%

“…128 However, Yang et al also showed that after increasing the flow rate to a critical value, the performance enhancement became less profound than within a moderate range of flow rates. 127 With regard to the reverse process, namely, Zn electrodeposition, Khezri et al applied in situ optical imaging, ex situ microscopic imaging, and multiphysics simulation, revealing both the individual and combined effects of current density and flow rate. 118 Overall, increasing the flow rate and maintaining a moderate current density are essential to steer the ZnO:Zn ratio to minimal so that uniform Zn electrodeposition could be realized.…”

Section: ■ Reaction Engineeringmentioning

confidence: 99%

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Zinc–Air Flow Batteries at the Nexus of Materials Innovation and Reaction Engineering

Liu,

Peng

2023

Ind. Eng. Chem. Res.

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Electrically rechargeable zinc–air flow batteries (ZAFBs) remain promising candidates for large-scale, sustainable energy storage. The implementation of a flowing electrolyte system could mitigate several inherent issues at static conditions, such as zinc dendrite and byproduct accumulation. This review focuses on two important aspects for the development of advanced ZAFBs, materials innovation and reaction engineering, and summarizes corresponding research efforts in improving the anode utilization and reversibility, designing air cathodes with superior bifunctional catalysis toward oxygen reduction and evolution reactions, and engineering/optimizing cell configurations and complementary operation parameters. Finally, an outlook on the remaining challenges and possible directions of codesign for ZAFBs is supplied. We anticipate this review to illuminate the development of modern ZAFBs and other analogous systems at the nexus of materials science and chemical engineering.

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Section: ■ Reaction Engineeringmentioning

confidence: 99%

Section: ■ Reaction Engineeringmentioning

confidence: 99%

Zinc–Air Flow Batteries at the Nexus of Materials Innovation and Reaction Engineering

Liu,

Peng

2023

Ind. Eng. Chem. Res.

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“…[24,39] In addition to the importance of using an alkaline electrolyte, it is also necessary to choose the right concentration: increasing the concentration of KOH can reduce the resistance of the electrolyte, but too high concentration can lead to increased viscosity [24] and cause faster consumption of the zinc anode. [40] According to the conclusions reached by Thomas et al [41] and by Sangeetha et al, [32] in this experimental setup it was chosen a KOH concentration of 40 wt%.…”

Section: Electrolytementioning

confidence: 99%

Experimental Characterization of a Novel Fluidized‐Bed Zn–Air Fuel Cell

Gesualdo,

Milanese,

Colangelo

et al. 2023

Advanced Sustainable Systems

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Zn–air fuel cells are promising energy storage devices for renewable energy and power sources, as they are cost‐effective and have high energy density. However, limited charge and discharge cycles and low round‐trip efficiency have long been obstacles to large‐scale market deployment. Herein, a new fluidized‐bed zinc–air fuel cell is designed, constructed, tested, and characterized. The integration of the fluidized bed in the zinc–air fuel cell leads to key advantages such as: erosion of the anode passivation layer, which plays a key role in the rapid voltage decay and keeping the products of reactions away from the proximity of the electrodes, reducing the concentration overpotential, due to the concentration gradient of electrode species in the diffusion boundary layer between the electrode–electrolyte interface and the electrolyte bulk.

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“…In addition, computational fluid dynamics (CFD) simulation has become a powerful tool in numerous prominent engineering fields and disciplines, which helps to predict complex phenomena based on the mathematical model. Thus, the CFD model consists of several governing equations such as the continuity equation, momentum equation, and Fick's diffusion law have been introduced to evaluate the performance in flowing-type ZAFC [14]. The oxygen distribution at a different inlet flow rate of electrolyte to find the optimum value was, therefore, predicted.…”

Section: Introductionmentioning

confidence: 99%

Determination of Flowing Electrolyte Parameters in a Zinc-Air Fuel Cell by the Taguchi Method

Huang

Nguyen

Yang

et al. 2023

International Journal of Energy Research

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The flowing electrolyte in a zinc-air fuel cell (ZAFC) can reduce the problem of incomplete reaction caused by the concentration gradient of the electrolyte. In this study, we propose a self-developed ZAFC with a flowing electrolyte system and optimize control parameters. The anode of the ZAFC used Zn particles through which the electrolyte penetrates and combined with a negative pressure pump to allow the potassium hydroxide (KOH) electrolyte to have an effective chemical reaction with the Zn particles during the discharge process. However, the flow rate of the electrolyte is required to match other control parameters, such as operating temperature, KOH concentration, and cell size, to effectively improve the efficiency of ZAFC. Therefore, the Taguchi method is adopted to obtain the optimal reaction parameters and the key factors affecting the discharge efficiency of the cell. The best operation condition is the temperature at 50°C, the KOH concentration of 30% wt, and the electrolyte flow rate of 150ml/min; then, the maximum power obtained from the experimental results is 13.8 W, the maximum current density reaches 699.721 mA/cm2, and the maximum power density is 395.037 mW/cm2. This paper provides valuable insights for the upgrade of ZAFC for future practical applications.

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The optimization of electrolyte flow management to increase the performance of Zn–air fuel cells

Cited by 8 publications

References 41 publications

Zinc–Air Flow Batteries at the Nexus of Materials Innovation and Reaction Engineering

Zinc–Air Flow Batteries at the Nexus of Materials Innovation and Reaction Engineering

Experimental Characterization of a Novel Fluidized‐Bed Zn–Air Fuel Cell

Determination of Flowing Electrolyte Parameters in a Zinc-Air Fuel Cell by the Taguchi Method

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