A promising hybrid additive for enhancing the performance of alkaline aluminum-air batteries

Yang, Lixia; Wu, Yuntao; Chen, Shuo; Xiao, Yuanqiang; Chen, Sen; Zheng, Peng; Wang, Junxia; Qu, Jun‐e

doi:10.1016/j.matchemphys.2020.123787

Cited by 35 publications

(26 citation statements)

References 70 publications

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“…The EIS diagrams are characterized by a capacitive impedance semicircle at high frequencies and a second capacitive impedance semicircle at low frequencies, as shown in Figures c,f and S4c. To further reveal the interface characteristics of the anode, the equivalent electric circuit proposed in Figure c was used to fit the experimental data, and the results are shown in Table S5 . Also, the equivalent circuit is composed of the solution resistance ( R s ), a series of combination of resistance ( R 1 and R 2 ), and charge transfer resistance ( R ct,1 and R ct,2 ).…”

Section: Results and Discussionmentioning

confidence: 98%

“…Actually, the E ocp cannot reach the theoretical value in practice due to the formation/dissolution of the Al 2 O 3 passivating film, the presence of the reaction products [Al(OH) 4 – , Al(OH) 3 , etc], and the hydrogen evolution reaction . Also, the initial positive potential shift could be ascribed to the adsorption of intermediates such as the hydroxide of aluminum on the Al surface . The E ocp of Al anode is −1.431 V versus Hg/HgO in 4 M NaOH solution, which is more positive than the E ocp of the Al anode in the electrolyte with inhibitors, suggesting that the cathodic reaction (eq ) was inhibited after adding inhibitors.…”

Section: Results and Discussionmentioning

confidence: 99%

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Anode Interfacial Layer Construction via Hybrid Inhibitors for High-Performance Al–Air Batteries

Cheng

Wang

Zheng

et al. 2021

ACS Appl. Mater. Interfaces

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The self-corrosion of aluminum anodes is one of the key issues that hinder the development and application of low-cost and high-energy-density Al–air batteries (AABs). Herein, a hybrid corrosion inhibitor combining ZnO and acrylamide (AM) was developed to construct a dense protective interface on the Al anode to suppress the self-corrosion and enhance the electrochemical performance of AABs. Also, the results show that the hydrogen evolution rate with the optimal combination of hybrid inhibitors is 0.0848 mL cm–2 min–1, corresponding to the inhibition efficiency of 78.03%. The integrated AABs with hybrid inhibitors show remarkable capacities of 1240.6 mA h g–1 (25 mA cm–2) and 2444.1 mA h g–1 (100 mA cm–2) and a high power density of 63.7 mW cm–2. This shows that ZnO dissolves into the electrolyte and forms a loose and porous film on the Al surface. When AM is introduced into the ZnO-containing electrolyte, the adsorption of the amide group of AM on the surface of aluminum and ZnO occurs, which not only controls the growth morphology of ZnO but also enables ZnO to easily aggregate into a layer that is in close contact with the anode, efficiently suppressing self-corrosion. This work opens up the prospect of a corrosion inhibition mechanism for ZnO and AM in alkaline solutions and for developing effective organic/inorganic hybrid inhibitors.

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Section: Results and Discussionmentioning

confidence: 98%

Section: Results and Discussionmentioning

confidence: 99%

Anode Interfacial Layer Construction via Hybrid Inhibitors for High-Performance Al–Air Batteries

Cheng

Wang

Zheng

et al. 2021

ACS Appl. Mater. Interfaces

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“…Figure 3A shows the OCP of Al electrode immersed in 6 M KOH electrolyte containing ZnO with different PS for 500 s. A similar changing law can be seen from it: because the aluminum oxide (Al 2 O 3 ) and other substances on the Al electrode surface block the contact between Al and solution at the beginning of immersion, the potential is negative but cannot reach the theoretical value (Wu et al, 2020b). Within 100-150 s Besides, the rapid generation and skipping of H 2 on the surface of Al electrode also has an impact on it (Yang et al, 2021). After that, the potential tends to stabilize, but the equilibrium potential of the Al electrode is different for different PS of ZnO.…”

Section: Electrochemical Analysis Of Anodementioning

confidence: 57%

“…It is attributed to the rapid dissolution of Al 2 O 3 and formation of Zn during this stage. Besides, the rapid generation and skipping of H 2 on the surface of Al electrode also has an impact on it ( Yang et al., 2021 ). After that, the potential tends to stabilize, but the equilibrium potential of the Al electrode is different for different PS of ZnO.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, zinc sulfate (ZnSO 4 ) has been used by researchers instead of ZnO to dissolve in alkaline solution as an inhibitor. The regularity of Al self-corrosion was studied when the concentration of ZnSO 4 changed from 1 to 10 mM, and sodium alginate was used in conjunction with the optimal ZnSO 4 concentration to further reduce the hydrogen evolution rate of Al and improve the discharge performance of the fuel cell ( Yang et al., 2021 ).…”

Section: Introductionmentioning

confidence: 99%

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A high-performance Al-air fuel cell using a mesh-encapsulated anode via Al–Zn energy transfer

et al. 2021

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Summary Aluminum-air fuel cells attract more attention because of their high specific energy, low cost, and friendly environment. However, the problems of hydrogen evolution corrosion and low anode efficiency of aluminum-air fuel cells remain unresolved. Herein, we propose an aluminum-air fuel cell using a mesh-encapsulated anode, where the energy redistribution can be achieved and the discharge performance of the fuel cell can be highly improved. The results show that the highest inhibition efficiency is 73.930% when the aluminum plate is immersed in 6 M potassium hydroxide solution containing 100% zinc oxide. The highest anode efficiency is up to 61.740% when the fuel cell using a mesh-encapsulated anode is discharged at 20 mA/cm 2 , which is more than 2 times than that of no mesh, and the highest capacity can reach 1839.842 mAh/g, which is 101.623% higher than before optimization. Thus, our studies are very instructive for the large-scale application of aluminum-air fuel cells.

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A Prussian‐Blue Bifunctional Interface Membrane for Enhanced Flexible Al–Air Batteries

Wei

Wang

Zuo

et al. 2023

Adv Funct Materials

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Flexible Al–air batteries have attracted widespread attention in the field of wearable power due to the high theoretical energy density of Al metal. However, the efficiency degradation and anodizing retardation caused by Al parasitic corrosion severely limit the performance breakthrough of the batteries. Herein, a Prussian‐blue bifunctional interface membrane is proposed to improving the discharge performance of hydrogel‐based Al–air battery. When a rational 12 mg·cm−2 membrane is loaded, the effect of anticorrosion and activation is optimal thanks to the formation of a stable and breathable interface. The results demonstrate that a flexible Al–air battery using the membrane can output a high power density of 65.76 mW·cm−2. Besides, the battery can achieve a high capacity of 2377.43 mAh·g−1, anode efficiency of 79.78%, and energy density of 3176.39 Wh·kg−1 at 10 mA·cm−2. Density functional theory calculations uncover the anticorrosion‐activation mechanism that Fe3+ with a large number of empty orbitals can accelerate electrons transfer, and nucleophilic reactant [FeII(CN)6]4− promotes the Al3+ diffusion. These findings are beneficial to the inhibition of interfacial parasitic corrosion and weakening of discharge hysteresis for flexible Al–air batteries.

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A promising hybrid additive for enhancing the performance of alkaline aluminum-air batteries

Cited by 35 publications

References 70 publications

Anode Interfacial Layer Construction via Hybrid Inhibitors for High-Performance Al–Air Batteries

Anode Interfacial Layer Construction via Hybrid Inhibitors for High-Performance Al–Air Batteries

A high-performance Al-air fuel cell using a mesh-encapsulated anode via Al–Zn energy transfer

A Prussian‐Blue Bifunctional Interface Membrane for Enhanced Flexible Al–Air Batteries

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