A Function‐Separated Design of Electrode for Realizing High‐Performance Hybrid Zinc Battery

Zhong, Yijun; Xu, Xiaomin; Liu, Pengyun; Ran, Ran; Jiang, San Ping; Wu, Hongwei; Shao, Zongping

doi:10.1002/aenm.202002992

Cited by 101 publications

(80 citation statements)

References 74 publications

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“…A typical alkaline Zn‐air battery is comprised of an air cathode, a Zn anode and an aqueous electrolyte [9,10] . Because of the slow kinetics of oxygen redox reactions on the air cathode, a bifunctional catalyst which can facilitate both the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is required to obtain low overpotentials of discharging/charging and high energy efficiency [7,11–13] . In the past few decades, different types of catalysts have been developed, including precious metals, transition metal compounds, functional carbon‐based materials [14–23] .…”

Section: Introductionmentioning

confidence: 99%

Facilitating Oxygen Redox on Manganese Oxide Nanosheets by Tuning Active Species and Oxygen Defects for Zinc‐Air Batteries

Zhong

Dai

et al. 2020

ChemElectroChem

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Bifunctional oxygen catalyst is an important component in the cathode for rechargeable zinc‐air batteries. MnO2 catalysts have aroused intense interests owing to their promising activity for oxygen reduction reaction (ORR), which, however, is still not comparable to precious metal catalysts. To improve the ORR catalysis and meet the requirement for a bifunctional oxygen catalyst, MnO2 nanosheets are modified with Co, Ni or Fe via a facile solution‐based method. Among the modified samples, Co−MnO2 presents improved catalysis for both ORR and oxygen evolution reaction (OER). The modification introduces additional active sites for OER and induced more oxygen defects to further facilitate the ORR. Zn‐air batteries with the Co−MnO2 air cathode showed a higher peak power density of 167 mW cm−2, a lower potential gap of 0.75 V and a higher round‐trip efficiency of 63 % (5 mA cm−2) compared to MnO2 without modification. Good cycling stability of the battery is also achieved. The proper amount of cobalt species in the MnO2 is vital for achieving a balance between high performance and durable cycling.

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Section: Introductionmentioning

confidence: 99%

Facilitating Oxygen Redox on Manganese Oxide Nanosheets by Tuning Active Species and Oxygen Defects for Zinc‐Air Batteries

Zhong

Dai

et al. 2020

ChemElectroChem

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“…[120] Li et al grew NiCo 2 O 4 nanowire arrays on carbon-coated nickel foam to construct a hybrid electrode (Figure 8c). [121] Recently, other metal oxides and sulfides, such as NS@Co 3−x Ni x O 4 /Co 3 O 4 , [122] MnSNi x Co 1−x S 2 , [123] DBHF, [124] NiCo 2 S 4 /3DNCC, [125] have also been used to construct hybrid battery. The performance of hybrid batteries is shown in Table 1.…”

Section: New Strategies To Improve Efficiency/stability Of Zabsmentioning

confidence: 99%

Structural Design Strategy and Active Site Regulation of High‐Efficient Bifunctional Oxygen Reaction Electrocatalysts for Zn–Air Battery

Zhang

Wang

et al. 2021

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Zinc–air batteries (ZABs) exhibit high energy density as well as flexibility, safety, and portability, thereby fulfilling the requirements of power batteries and consumer batteries. However, the limited efficiency and stability are still the significant challenge. Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are two crucial cathode reactions in ZABs. Development of bifunctional ORR/OER catalysts with high efficiency and well stability is critical to improve the performance of ZABs. In this review, the ORR and OER mechanisms are first explained. Further, the design principles of ORR/OER electrocatalysts are discussed in terms of atomic adjustment mechanism and structural design in conjunction with the latest reported in situ characterization techniques, which provide useful insights on the ORR/OER mechanisms of the catalyst. The improvement in the energy efficiency, stability, and environmental adaptability of the new hybrid ZAB by the inclusion of additional reaction, including the introduction of transition‐metal redox couples in the cathode and the addition of modifiers in the electrolyte to change the OER pathway, is also summarized. Finally, current challenges and future research directions are presented.

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“…[142][143][144] Such concept of asymmetric hydrophilic/ hydrophobic microchannels and function-separated design www.advmattechnol.de of electrode deserve more attention in integrated oxygen electrodes, especially for FZABs to realize desirable power density and operational stability under high current densities. [145] In practice, high-efficiency electrolyte component is thus another way and equally important to further engineer the electrode/ electrolyte interfaces. It is urgently desired to develop quasisolid-state polymeric electrolytes with superior ionic conductivity, high water-retention ability, alkaline tolerance, minimized carbonation and excellent mechanical strength/elasticity for FZABs.…”

Section: Cathode/electrolyte Interfaces and Polymeric Electrolytesmentioning

confidence: 99%

Integrated Bifunctional Oxygen Electrodes for Flexible Zinc–Air Batteries: From Electrode Designing to Wearable Energy Storage

Yang

et al. 2021

Adv Materials Technologies

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The global market of flexible/printed and organic electronics is about 41 billion dollars in 2020, which is expected to reach over 74 billion dollars in 2030 according to the relevant reports by IDTechEx. [3] As for the development and expansion toward practical application, flexible/wearable electronics urgently request for flexible energy sources and power devices with high specific energy density and long lifetime. During the past decade, a variety of flexible energy harvesting/conversion (e.g., solar cells, nanogenerators) and energy storage devices (e.g., batteries, supercapacitors, hybrid batteries) have dedicatedly progressed and gained ongoing recognition for future wearable applications. [4][5][6] Among those promising renewable energy technologies, rechargeable lithium-ion batteries (LIBs) have received widespread adoptions for power supplies ranging from mobile/portable electronics to plug-in/ hybrid electric vehicles because of their high working voltage, appreciable energy density, easy use, and ecofriendliness. [7] Flexible LIBs became one of the potential options for powering flexible electronics. With further advance, flexible LIBs are plagued by their limited energy density, deficient safety, and relatively high cost of electrode materials (e.g., lithium, cobalt). In this case, alternative battery technologies, especially metal-air batteries gain immense attention (Table 1). [8,9] Metal-air batteries (MABs) own 2-10 times higher specific energy than current LIBs (200-250 Wh kg −1 ) due to the direct utilization of oxygen from the atmosphere within a halfopen device system. Alongside, rechargeable MABs have more freedom in metallic anodes such as lithium, sodium, potassium, zinc, aluminum and magnesium, etc., where the latter three-based MABs are compatible with aqueous alkaline electrolytes and also intrigued numerous interest. [10][11][12] Given the high theoretical specific energy (1218 Wh kg −1 , 6136 Wh L −1 ), low fabrication cost, high operational safety and environmental benignancy, aqueous zinc-air batteries (ZABs) show far more practical prospect for new-generation energy storage sources. [11] Figure 1 illustrates the brief chronology of the development of ZABs. Dating back to 1878, the first The strong propulsion stem from flexible/wearable electronics has greatly stimulated the development of miniaturized and high-performance rechargeable batteries with adaptable shape. Flexible zinc-air batteries (FZABs), which exhibit high theoretical energy density (1218 Wh kg −1 ), low cost, environmental benignancy, and admirable operational safety, have been widely recognized as one of the promising portable powers to serve future wearable electronics for ubiquitous application. During the past five years, the energy/ power density and cycling stability of FZABs have gained significant improvement largely due to the rational construction of high-efficiency bifunctional air electrodes. Herein, the recent progress of integrated binder-free bifunctional oxygen electrodes is overviewed via elaborate ...

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A Function‐Separated Design of Electrode for Realizing High‐Performance Hybrid Zinc Battery

Cited by 101 publications

References 74 publications

Facilitating Oxygen Redox on Manganese Oxide Nanosheets by Tuning Active Species and Oxygen Defects for Zinc‐Air Batteries

Facilitating Oxygen Redox on Manganese Oxide Nanosheets by Tuning Active Species and Oxygen Defects for Zinc‐Air Batteries

Structural Design Strategy and Active Site Regulation of High‐Efficient Bifunctional Oxygen Reaction Electrocatalysts for Zn–Air Battery

Integrated Bifunctional Oxygen Electrodes for Flexible Zinc–Air Batteries: From Electrode Designing to Wearable Energy Storage

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