A dual-electrolyte system for highly efficient Al–air batteries

Zhao, Qian; Wu, Pengfei; Sun, Dan; Wang, Haiyan; Tang, Yougen

doi:10.1039/d1cc07044d

Cited by 17 publications

(14 citation statements)

References 27 publications

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“…While a number of studies have investigated the performance of bifunctional ORR/OER catalysts in acidic electrolytes, − the commonly used metal anodes for MABs, such as Li, Mg, Al, and Zn, react violently and exothermically for hydrogen evolution, an unwanted reaction of this system. , The high risk of anode corrosion and additional thermal treatment requirement, on top of the low stability of most catalysts in acidic media, limits their opportunities for widescale application. Aqueous alkaline electrolytes, on the other hand, are more frequently used for MABs because of their higher ionic conductivities, , low cost, and better catalyst stability . More importantly, the bond formation of the catalyst is lower in alkaline; thereby requiring a lower ORR overpotential compared to acidic electrolytes. , We then limit our scope to electrocatalysts for ORR/OER in alkaline medium.…”

Section: Transition Metals In Oxygen Evolution Reaction/oxygen Reduct...mentioning

confidence: 99%

“…119,120 The high risk of anode corrosion 127 and additional thermal treatment requirement, 119 on top of the low stability of most catalysts in acidic media, limits their opportunities for widescale application. Aqueous alkaline electrolytes, on the other hand, are more frequently used for MABs because of their higher ionic conductivities, 128,129 low cost, and better catalyst stability. 120 More importantly, the bond formation of the catalyst is lower in alkaline; thereby requiring a lower ORR overpotential compared to acidic electrolytes.…”

Section: Transition Metals In Oxygen Evolution Reaction/oxygen Reduct...mentioning

confidence: 99%

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Review and Perspective on Transition Metal Electrocatalysts Toward Carbon-Neutral Energy

et al. 2023

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Decarbonizing the chemical industry and achieving carbon-neutral energy is paramount to the sustainability of the human species on earth. Electrocatalysis using transition metalbased catalysts plays a major role in achieving this task. In this work, we present an overview on the application of transition metal-based catalysts in electrocatalytic reactions. We particularly focus on the advancement of the hydrogen evolution reaction (HER), oxygen evolution reaction (OER), oxygen reduction reaction (ORR), nitrogen reduction reaction (NRR), and carbon dioxide reduction reaction (CO 2 RR) using transition metal electrocatalysts. We also aim to highlight the major achievements in these fields and the limitations in their large-scale industrial applications. Different transition metal catalysts are discussed, from 3-dimensional to 1-to 0-dimensional structures. We place special attention to the emerging transition metal catalysts such as 2dimensional carbide and nitride MXenes and single atom catalysts. Lastly, we offer recommendation for future research directions for the aforementioned electrocatalysis fields using transition metal electrocatalysts. This work will ultimately help both existing and incoming researchers in these fields in providing the state-of-the-art research findings and identifying the major challenges that must be addressed in order to attain carbon-neutral energy.

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Section: Transition Metals In Oxygen Evolution Reaction/oxygen Reduct...mentioning

confidence: 99%

Section: Transition Metals In Oxygen Evolution Reaction/oxygen Reduct...mentioning

confidence: 99%

Review and Perspective on Transition Metal Electrocatalysts Toward Carbon-Neutral Energy

et al. 2023

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“…In the last year, the use of a dual electrolyte in Al-air cell, where two different electrolytes are placed in contact with anode (anolyte) and cathode (catholyte), emerged as an effective strategy for separating the environments of the anodic and cathodic reactions. The advantage of using dual electrolytes in Al-air batteries is 2-fold, namely, it is possible to control the anodic self-corrosion , and obtain higher cell potentials . Typically, in fact, the configuration in which the anode is kept in contact with an alkaline electrolyte and the cathode with an acid electrolyte gave very high cell potentials .…”

Section: Polymer Electrolytes In Al-air Batteriesmentioning

confidence: 99%

Polymer Electrolytes for Al-Air Batteries: Current State and Future Perspectives

Gaele¹,

Palma²

2022

Energy Fuels

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Aluminum–air (Al-air) batteries are promising electrochemical storage systems, because of their practicality, low flammability and no risk of explosion, eco-compatibility, and high energy density. However, Al-air batteries realized with liquid electrolytes may present safety concerns, because of leakage, and are unsuitable for miniaturized and portable electronic devices. The transition of the electrolytes for Al-air batteries from aqueous to solid form is an inevitable trend for safety, stability, and possible widespread use. Nevertheless, the manufacturing of new solid electrolytes for Al-air batteries is still a new and largely unexplored field. In fact, the most significant results appeared only in the last decade, with the development of new polymer electrolytes. In this Review, we summarize the most significant findings on polymer electrolytes used in Al-air batteries, particularly emphasizing the cell electrochemical performances and how these relate to the characteristics of the electrolyte.

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“…[28][29] In addition, biphasic electrolytes were developed i) to enhance the electrochemical stability window of electrolytes for Li-ion batteries and ii) to suppress polysulfide crossover in Li-S batteries. [17,22,[30][31][32][33][34] Li + activity is a value that varies with surrounding mediums, depending on concentration, ion-ion interaction, and ion-solvent interaction. [35] The Li + activity in nonaqueous electrolytes, however, was not sufficiently studied because changes in the Li + activity of conventional Li-ion batteries containing a single-phase electrolyte do not contribute to regulating the thermodynamics of electrochemical reactions.…”

Section: Introductionmentioning

confidence: 99%

“…[ 28–29 ] In addition, biphasic electrolytes were developed i) to enhance the electrochemical stability window of electrolytes for Li‐ion batteries and ii) to suppress polysulfide crossover in Li‐S batteries. [ 17,22,30–34 ]…”

Section: Introductionmentioning

confidence: 99%

Correlation between Redox Potential and Solvation Structure in Biphasic Electrolytes for Li Metal Batteries

Park

Kim

et al. 2022

Advanced Science

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The activity of lithium ions in electrolytes depends on their solvation structures. However, the understanding of changes in Li + activity is still elusive in terms of interactions between lithium ions and solvent molecules. Herein, the chelating effect of lithium ion by forming [Li(15C5)] + gives rise to a decrease in Li + activity, leading to the negative potential shift of Li metal anode. Moreover, weakly solvating lithium ions in ionic liquids, such as [Li(TFSI) 2 ] − (TFSI = bis(trifluoromethanesulfonyl)imide), increase in Li + activity, resulting in the positive potential shift of LiFePO 4 cathode. This allows the development of innovative high energy density Li metal batteries, such as 3.8 V class Li | LiFePO 4 cells, along with introducing stable biphasic electrolytes. In addition, correlation between Li + activity, cell potential shift, and Li + solvation structure is investigated by comparing solvated Li + ions with carbonate solvents, chelated Li + ions with cyclic and linear ethers, and weakly solvating Li + ions in ionic liquids. These findings elucidate a broader understanding of the complex origin of Li + activity and provide an opportunity to achieve high energy density lithium metal batteries.

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A dual-electrolyte system for highly efficient Al–air batteries

Abstract: Herein, a brand-new dual-electrolyte system consisting of porous polyacrylic acid (PAA) hydrogel and 4 M KOH aqueous electrolyte is put forward. The Al-air battery with this dual-electrolyte system demonstrates well-suppressed...

Cited by 17 publications

References 27 publications

Review and Perspective on Transition Metal Electrocatalysts Toward Carbon-Neutral Energy

Review and Perspective on Transition Metal Electrocatalysts Toward Carbon-Neutral Energy

Polymer Electrolytes for Al-Air Batteries: Current State and Future Perspectives

Correlation between Redox Potential and Solvation Structure in Biphasic Electrolytes for Li Metal Batteries

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