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From the above-mentioned investigations, the flowing electrolyte has an apparently positive impact on the discharge performance of a zinc-air flow battery owing to the enhanced ion transport, and a higher flow rate is preferred in a flow rate range.
Therefore, the performance improvement in zinc-air flow batteries is attributed to the enhanced transport of hydroxide and zincate ions rather than oxygen. The revealed mechanism can serve as the basis to design proper flow field and battery structure, and promote zinc-air flow batteries toward practical applications. 1. Introduction
A zinc–air battery is a metal–air electrochemical cell powered by the oxidation of zinc with oxygen from the air. During discharge, a mass of zinc particles forms a porous anode, which is saturated with an electrolyte. Oxygen from the air reacts at the cathode and forms hydroxyl ions which migrate into the zinc paste and form zincate (Zn (OH)2−
Zinc–air battery discharge current with nickel foam substrate at 1 V operating potential is shown to be 4500 mA.cm −3 (324 mA.cm −2 with GDL thickness of 721 μm) which is reasonably high compared to other reported values given in Table 4.
Compared with conventional static zinc-air batteries, the electrochemical performance can be significantly improved, whereas the intrinsic mechanism is still unclear. Herein, the mechanism of the discharge performance improvement from the flowing electrolyte is systematically investigated by combining experimental and modeling methods.
In this regard, zinc-air flow batteries (ZAFBs) are seen as having the capability to fulfill this function. In flow batteries, the electrolyte is stored in external tanks and circulated through the cell. This study provides the requisite experimental data for parameter estimation as well as model validation of ZAFBs.
The simulation of 2 h of charge & discharge each with 2A.dm −2 air-electrode current density, found that the discharge potential drop starts at the 7th cycle and the drop …
Abstract Zinc–air battery (ZAB) technology is considered one of the promising candidates to complement the existing lithium-ion batteries for future large-scale high-energy-storage …
1 · This study investigates the role of electrolyte flow in enhancing zinc electrodeposition and overall performance in zinc-air flow batteries (ZAFBs) at high current densities. We explore the …
Optimization of the charging reaction for zinc–air batteries remains a significant challenge. Here, we report a series of zinc–alcohol–air batteries that replace the oxygen evolution reaction with …
Zinc–air battery discharge current with nickel foam substrate at 1 V operating potential is shown to be 4500 mA.cm −3 (324 mA.cm −2 with GDL thickness of 721 μm) which …
This work reveals the mechanism of the flowing electrolyte on discharge performance improvement, which can serve as the basis to design proper flow field and …
1 · This study investigates the role of electrolyte flow in enhancing zinc electrodeposition and overall performance in zinc-air flow batteries (ZAFBs) at high current densities. We explore the …
A zinc–air battery is a metal–air electrochemical cell powered by the oxidation of zinc with oxygen from the air. ... Providing charge and discharge functions by separate uni-functional cathodes …
The insulating ZnO passivation film inhibits the discharge process, thus reducing both the zinc electrode utilization and the battery capacity; this is one of the important reasons …
In this paper, a method to increase the output power of a button zinc–air battery by applying acoustofluidics induced by ultrasonic excitation to the battery is proposed and …
We also show that the dual use of the electrolyte significantly improves the energy density of the battery in terms of specific discharge capacity and highlight that …
The Zn-air cell operated stably for 1600 hours in ambient air at a current density of 0.1 mA cm −2 with a 10-hour charge and discharge duration per cycle . When cycled at a 10-times-higher current density of 1.0 mA cm −2, a …
Non-aqueous electrolytes have been proposed recently to increase battery performance by eliminating water evaporation and parasitic reactions. Using a molten …
2 Assessing Rechargeability in Zinc–Air Battery. Looking at current reports in the field of rechargeable zinc–air batteries, one often finds cycling protocols over a multitude of hundreds of cycles and more. ... A porous anode, such as a zinc …
A zinc–air battery is a metal–air electrochemical cell powered by the oxidation of zinc with oxygen from the air. During discharge, a mass of zinc particles forms a porous anode, which is …
A conventional two-electrode rechargeable zinc–air battery (RZAB) has two major problems: 1) opposing requirements for the oxygen reduction (ORR) and oxygen …
Discharge curves for the four different runs and the repeated experiment for each run: (a) electrolyte flow rate 60 ml/min and discharge current 175 mA (b) electrolyte flow …
When the same current density of 60 mA cm −2 was maintained, increasing the flow rate from 0.010 m s −1 to 0.021 m s −1 led to an improved performance of the zinc-air …