Air Cathodes and Bifunctional Oxygen Electrocatalysts for Aqueous Metal–Air Batteries

Milikić, Jadranka; Nastasić, Ana; Martins, Marta; Sequeira, César A. C.; Šljukić, Biljana

doi:10.3390/batteries9080394

Cited by 14 publications

(2 citation statements)

References 67 publications

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“…The progress in sustainable energy technologies is largely dependent on the efficiency of crucial components such as electrodes, especially in applications such as ampere-scale alkaline water electrolysis [1] and zinc-air batteries (ZABs) [2]. Despite significant advances in understanding intrinsic catalytic activity [3,4], the selection of current collecting materials remains largely limited to a few commercialized options.…”

Section: Introductionmentioning

confidence: 99%

Graphite Felt as an Innovative Electrode Material for Alkaline Water Electrolysis and Zinc–Air Batteries

Lee,

Park,

Ahn

2024

Batteries

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Recent advancements in energy conversion and storage systems have placed a spotlight on the role of multi-functional electrodes employing conductive substrates. These substrates, however, often face obstacles due to intricate and expensive production methods, as well as limitations in thickness. This research introduces a novel, economical approach using graphite felt as a versatile electrode. A method to enhance the typically low conductivity of graphite felt was devised, incorporating interfacial chemical tuning and the electrodeposition of a highly conductive nickel layer. This technique facilitates the integration of diverse transition metal-based active sites, aiming to refine the catalytic activity for specific electrochemical reactions. A key finding is that a combination of a nickel-rich cathode and an iron-rich anode can effectively optimize alkaline water electrolysis for hydrogen production at the ampere scale. Furthermore, the addition of sulfur improves the bi-functional oxygen-related redox reactions, rendering it ideal for air cathodes in solid-state zinc–air batteries. The assembled battery exhibits impressive performance, including a peak power density of 62.9 mW cm−2, a minimal voltage gap in discharge–charge polarization, and a lifecycle surpassing 70 h. This advancement in electrode technology signifies a significant leap in energy storage and conversion, offering a sustainable and efficient solution for future energy systems.

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Section: Introductionmentioning

confidence: 99%

Graphite Felt as an Innovative Electrode Material for Alkaline Water Electrolysis and Zinc–Air Batteries

Lee,

Park,

Ahn

2024

Batteries

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“…Previous research found that the mass transfer in the cathode largely affected the battery performance [15][16][17][18][19][20]. For magnesium-dissolved oxygen seawater batteries, the source of oxygen in the cathode reaction is different from that of conventional metal-air batteries.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Discharging Magnesium-Dissolved Oxygen Seawater Batteries with Various Binder Ratios

Cao,

Li,

Wang

et al. 2023

Applied Sciences

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Magnesium-dissolved oxygen seawater batteries have open structures and flow seawater as electrolytes. These two features attract much attention. The cathode electrode is one of the key components that affect the performance of seawater batteries. In this study, seawater batteries with carbon cathodes made from three commercial carbons were investigated and discussed. The porous structure of the cathode was adjusted by changing the mass ratio between polytetrafluoroethylene (PTFE) and carbon materials. The binder ratios range from 10% to 50%. The structure of the different porous carbon cathodes was characterized, and the discharging performance was analyzed. Results showed that the number of pores with diameters of 2–10 nm decreased as the PTFE ratio increased. Meanwhile, as the PTFE ratio increased from 10% to 50%, the seawater battery discharging voltage and capacity were first inhibited when the PTFE ratio was less than 20% but then promoted. It revealed that a balance should be achieved between the number of reaction sites and the paths for oxygen transfer. Moreover, the oxygen transfer in the porous electrode is more important for batteries working in seawater. This study practically investigates seawater batteries with various PTFE binder ratios and provides a reference for the design of magnesium-dissolved oxygen seawater batteries.

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Bifunctional Catalysts for CO₂ Reduction and O₂ Evolution: A Pivotal for Aqueous Rechargeable Zn−CO₂ Batteries

Gupta,

Mao,

Guo

2024

Advanced Materials

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The quest for the advancement of green energy storage technologies and reduction of carbon footprint is determinedly rising toward carbon neutrality. Aqueous rechargeable Zn–CO2 batteries (ARZCBs) hold the great potential to encounter both the targets simultaneously, i.e., green energy storage and CO2 conversion to value‐added chemicals/fuels. The major descriptor of ARZCBs efficiency is allied with the reactions occurring at cathode during discharging (CO2 reduction) and charging (O2 evolution) which own different fundamental mechanisms and hence mandate the employment of two different catalysts. This presents an overall complex and expensive battery system which requires a concrete solution, while the development and application of a bifunctional cathode catalyst toward both reactions could reduce the complexity and cost and thus can be a pivotal for ARZCBs. However, despite the increasing research interest and ongoing research, a systematic evaluation of bifunctional catalysts is rarely reported. In this review, the need of bifunctional cathode catalysts for ARZCBs and associated challenges with strategies have been critically assessed. A detailed progress examination and understanding toward designing of bifunctional catalyst for ARZCBs have been provided. This review will enlighten the future research approaching boosted performance of ARZCBs through the development of efficient bifunctional cathode catalysts.

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Air Cathodes and Bifunctional Oxygen Electrocatalysts for Aqueous Metal–Air Batteries

Cited by 14 publications

References 67 publications

Graphite Felt as an Innovative Electrode Material for Alkaline Water Electrolysis and Zinc–Air Batteries

Graphite Felt as an Innovative Electrode Material for Alkaline Water Electrolysis and Zinc–Air Batteries

Experimental Study of Discharging Magnesium-Dissolved Oxygen Seawater Batteries with Various Binder Ratios

Bifunctional Catalysts for CO₂ Reduction and O₂ Evolution: A Pivotal for Aqueous Rechargeable Zn−CO₂ Batteries

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Air Cathodes and Bifunctional Oxygen Electrocatalysts for Aqueous Metal–Air Batteries

Cited by 14 publications

References 67 publications

Graphite Felt as an Innovative Electrode Material for Alkaline Water Electrolysis and Zinc–Air Batteries

Graphite Felt as an Innovative Electrode Material for Alkaline Water Electrolysis and Zinc–Air Batteries

Experimental Study of Discharging Magnesium-Dissolved Oxygen Seawater Batteries with Various Binder Ratios

Bifunctional Catalysts for CO2 Reduction and O2 Evolution: A Pivotal for Aqueous Rechargeable Zn−CO2 Batteries

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Bifunctional Catalysts for CO₂ Reduction and O₂ Evolution: A Pivotal for Aqueous Rechargeable Zn−CO₂ Batteries