Effect of O2 flow in discharge products and performance of Li-O2 batteries

Júlio, Júlia P.O.; Francisco, Bruno A. B.; Sousa, Bianca; Silva, Jean Felipe Leal; Anchieta, Chayene G.; Nepel, Thayane Carpanedo de Morais; Rodella, Cristiane B.; Filho, Rubens Maciel; Doubek, Gustavo

doi:10.1016/j.ceja.2022.100271

Cited by 8 publications

(9 citation statements)

References 33 publications

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“…Comparing the solvents, DMSO is known to favor the solution mechanism due to Li 1+ solvation 12 and thus could facilitate the reaction with water, according to eq 1. The absence of LiOH with a DMSO solvent in closed conditions also indicates the influence of operating conditions over the chemical composition of the discharge products, as reported by Julio et al 47 This fact and the higher cyclability and discharge capacity from the closed system with only Li 2 O 2 as the resulting product also highlight that the observed LiOH in the open system was not a result from electrolyte degradation or strictly related to the water present in the system. Moreover, there were no Raman bands related to dimethyl sulfoxone (DMSO 2 ) in the spectrum which indicates that no DMSO oxidation was detected.…”

Section: ■ Results and Discussionsupporting

confidence: 69%

Systematic Study of O₂ Supply in Li–O₂ Batteries with High and Low Doner Number Solvents

Francisco

Júlio

Anchieta

et al. 2023

ACS Appl. Energy Mater.

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The Li–O2 battery is a promising technology due to its high theoretical specific energy. However, its practical capacity and cycling performance need further improvement. In this scenario, the influence of the electrolyte and the supply of air/O2 to the device are essential to enhance the performance and build a commercial prototype. This paper presents a study focusing on the influence of oxygen flow and pressure in the gravimetric capacity of Li–O2 batteries using two different electrolytes: dimethyl sulfoxide (DMSO/LiClO4) and tetraethylene glycol dimethyl ether (TEGDME/LiClO4). This study pointed out the negative influence of flow over the capacity when combined in an open cell. Due to electrolyte loss, the life cycle was also deeply affected using the open cell, especially for DMSO. However, DMSO leads to the best performance due to higher ionic conductivity, oxygen diffusivity, and absence of a direct reaction with the lithium anode. Thus, the closed cell reached a maximum discharge capacity of 22537 mAh g–1 with 26 cycles of 1000 mAh g–1 for DMSO and 8764 mAh g–1 with 13 cycles of 1000 mAh g–1 for TEGDME.

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Section: ■ Results and Discussionsupporting

confidence: 69%

Systematic Study of O₂ Supply in Li–O₂ Batteries with High and Low Doner Number Solvents

Francisco

Júlio

Anchieta

et al. 2023

ACS Appl. Energy Mater.

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“…While increasing the ow rate increased the capacity, very high ow rates had the opposite effect. Post-cycling analysis of the cell suggested that this was due to loss of electrolyte solution from the air electrode, which has been observed previously, 37,38 reconrming the need for a solvent-management system. 34 To explore the challenge of removing CO 2 and H 2 O from the gas stream of an open-architecture cell, we tested the scrubber lled with either activated charcoal or molecular sieves using a ow rate factor of 35.7.…”

Section: Faraday Discussion Papersupporting

confidence: 67%

A lithium–air battery and gas handling system demonstrator

Jordan,

Vailaya,

Holc

et al. 2024

Faraday Discuss.

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“…As a result, the intensity of the C–O peak was enhanced in the discharged electrode, and a peak corresponding to Li 2 CO 3 was evident. After being recharged, this peak progressively decreased in intensity and eventually vanished. − These findings demonstrate that the ZrO 2 @FeMnO 3 /GNS catalyst had a significant impact on encouraging the reversible breakdown of the Li 2 O 2 discharge products.…”

Section: Results and Discussionmentioning

confidence: 74%

“…After a full charge, the floral discharge products disappeared completely, as expected, and the electrode returned to its natural bare condition (Figure c). The aggregated film-like byproducts were, however, heaped densely on the FeMnO 3 /GNS electrode surface, thereby obstructing the transport channels and causing the electrode surface to prematurely passivate (Figure e) . After charging, the nondecomposed film-like discharge products continued to accumulate on the FeMnO 3 /GNS surface (Figure f), gradually deactivating the surface-active sites and causing a marked increase of discharge byproducts during prolonged cycling.…”

Section: Results and Discussionmentioning

confidence: 99%

“…The aggregated film-like byproducts were, however, heaped densely on the FeMnO 3 /GNS electrode surface, thereby obstructing the transport channels and causing the electrode surface to prematurely passivate (Figure 8e). 54 After charging, the nondecomposed film-like discharge products continued to accumulate on the FeMnO 3 /GNS surface (Figure 8f), gradually deactivating the surface-active sites and causing a marked increase of discharge byproducts during prolonged cycling. Figure 10 displays a schematic representation of the surface reaction pathways in the media, with and without RMs (LiI), of the electrodes of the ZrO 2 @FeMnO 3 perovskite nanocomposites.…”

Section: Reversibility Of Coralline-like Cathodementioning

confidence: 99%

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Fascinating Bifunctional Electrocatalytic Activity via a Mesoporous Structured FeMnO₃@ZrO₂ Matrix as an Efficient Cathode for Li–O₂ Batteries

Palani

et al. 2023

ACS Appl. Energy Mater.

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Nonaqueous Li−O 2 batteries have remarkable potential for use in future-generation sustainable green energy storage systems. Perovskites of the type ABO 3 provide bifunctional electrocatalytic activity superior to that of dual mixed-metal oxides due to the presence of crystallographic defects and oxygen vacancies, arising from the multivalency of the A and B cations. In this study, we used a facile hydrothermal method with an ammonia solution to modify coralline-like ZrO 2 with Fe 0.5 Mn 0.5 O 3 (FeMnO 3 ) and graphene nanosheets (GNSs). The porous structure of the resulting ZrO 2 @FeMnO 3 /GNS system featured a high surface area and large volume, thereby exposing a great number of active sites. X-ray photoelectron spectroscopy revealed that the surface of the as-synthesized FeMnO 3 @ZrO 2 /GNS cathode material was rich with oxygen vacancies (i.e., a huge quantity of defects). This coralline-like bifunctional electrocatalyst possessed effective redox capability between Li 2 O 2 and O 2 as a result of its excellent catalytic activity in the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER). We examined the charge/ discharge behavior of corresponding electrodes (EL-cell type for Li−O 2 battery) in the voltage range of 2.0−4.5 V (vs Li/Li + ). The synergistic effects of the high catalytic ability and coralline-like microstructure of our ZrO 2 @FeMnO 3 /GNS catalyst for Li−O 2 batteries resulted in its superior rate capability and excellent long-term cyclability, sustaining 100 cycles at 100 mA g −1 with a limited capacity of 1000 mAh g −1 . The cell overpotential was ∼0.14 V when adding LiI as a redox mediator, resulting in a more practical Li− O 2 battery with the ZrO 2 @FeMnO 3 /GNS catalyst. Therefore, ZrO 2 @FeMnO 3 /GNS catalysts having distinctive coralline-like structures can display outstanding bifunctional catalytic activity and electrical conductivity, suggesting great potential for enhanced Li−O 2 battery applications.

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Effect of O2 flow in discharge products and performance of Li-O2 batteries

Cited by 8 publications

References 33 publications

Systematic Study of O₂ Supply in Li–O₂ Batteries with High and Low Doner Number Solvents

Systematic Study of O₂ Supply in Li–O₂ Batteries with High and Low Doner Number Solvents

A lithium–air battery and gas handling system demonstrator

Fascinating Bifunctional Electrocatalytic Activity via a Mesoporous Structured FeMnO₃@ZrO₂ Matrix as an Efficient Cathode for Li–O₂ Batteries

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Effect of O2 flow in discharge products and performance of Li-O2 batteries

Cited by 8 publications

References 33 publications

Systematic Study of O2 Supply in Li–O2 Batteries with High and Low Doner Number Solvents

Systematic Study of O2 Supply in Li–O2 Batteries with High and Low Doner Number Solvents

A lithium–air battery and gas handling system demonstrator

Fascinating Bifunctional Electrocatalytic Activity via a Mesoporous Structured FeMnO3@ZrO2 Matrix as an Efficient Cathode for Li–O2 Batteries

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Product

Resources

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Systematic Study of O₂ Supply in Li–O₂ Batteries with High and Low Doner Number Solvents

Systematic Study of O₂ Supply in Li–O₂ Batteries with High and Low Doner Number Solvents

Fascinating Bifunctional Electrocatalytic Activity via a Mesoporous Structured FeMnO₃@ZrO₂ Matrix as an Efficient Cathode for Li–O₂ Batteries