Hierarchical pore-in-pore and wire-in-wire catalysts for rechargeable Zn– and Li–air batteries with ultra-long cycle life and high cell efficiency

Li, Longjun; Liu, Chao; He, Guang; Fan, Donglei; Manthiram, Arumugam

doi:10.1039/c5ee02616d

Cited by 107 publications

(69 citation statements)

References 46 publications

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“…34,35 On the other hand, the interconnected hierarchical porous structures with a large pore volume and surface area offer a smooth transport of reactants, as well as the significantly elevated utilization of active sites. 21,22 These synergetic effects as mentioned above are responsible for the high performance of HP-Fe-N/CNFs in electrochemical and Zn-air battery test (vide infra).…”

Section: Resultsmentioning

confidence: 96%

“…also hide the activities of catalysts. 21 Qiao et al designed a series of ordered meso-/macro porous g-C 3 N 4 /C catalysts and revealed the improved catalytic performance that fast diffusion brings. 22 Combined the advantages of diverse pores, hierarchically marco/meso/micro-porous structures aim at the promoted density and accessibility of active sites was much desired in the catalysts to lifting the catalytic performance Traditional methods for constructing hierarchically porous carbon materials usually employed silica template strategy.…”

Section: Introductionmentioning

confidence: 99%

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Interconnected Hierarchically Porous Fe, N-Codoped Carbon Nanofibers as Efficient Oxygen Reduction Catalysts for Zn–Air Batteries

Zhao

Lai

et al. 2017

ACS Appl. Mater. Interfaces

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Developing porous carbon-based non-precious-metal catalysts for an oxygen reduction reaction (ORR) is a suitable approach to significantly reduce the costs of fuel cells or metal-air batteries. Herein, interconnected hierarchically porous carbon nanofibers simultaneously doped with nitrogen and iron (HP-Fe-N/CNFs) were fabricated by facile pyrolysis of polypyrrole-coated electrospun polystyrene/FeCl fibers. The obtained carbon nanofibers have a high specific surface area (569.6 m/g) and large pore volume (1.00 cm/ g) as well as effective doping of N and Fe. Benefiting from the improved mass transfer and utilization of active sites attributed to interconnected hierarchical porous structures, HP-Fe-N/CNFs display excellent ORR catalytic activity in alkaline media, with a comparable onset potential and half-wave potential but superior selectivity, stability, and tolerance against methanol to commercial 30 wt % Pt/C. Particularly, when applied in an assembled Zn-air battery, HP-Fe-N/CNFs outperform 30 wt % Pt/C in power density and long-term stability, explicitly showing their promising practical application.

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Section: Resultsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Interconnected Hierarchically Porous Fe, N-Codoped Carbon Nanofibers as Efficient Oxygen Reduction Catalysts for Zn–Air Batteries

Zhao

Lai

et al. 2017

ACS Appl. Mater. Interfaces

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“…It should be noted that some Zn–air batteries have used decoupled O 2 electrodes loaded with different electrocatalysts for ORR and OER separately. However, this approach often complicates the battery structures . Thus, bifunctional O 2 electrocatalysts are much more desirable.…”

Section: Air Electrodesmentioning

confidence: 99%

Recent Advances in Materials and Design of Electrochemically Rechargeable Zinc–Air Batteries

Chen

Zhou

Karahan

et al. 2018

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The century-old zinc-air (Zn-air) battery concept has been revived in the last decade due to its high theoretical energy density, environmental-friendliness, affordability, and safety. Particularly, electrically rechargeable Zn-air battery technologies are of great importance for bulk applications like electric vehicles, grid management, and portable electronic devices. Nevertheless, Zn-air batteries are still not competitive enough to realize widespread practical adoption because of issues in efficiency, durability, and cycle life. Here, following an introduction to the fundamentals and performance testing techniques, the latest research progress related to electrically rechargeable Zn-air batteries is compiled, particularly new key findings in the last five years (2013-2018). The strategies concerning the development of Zn and air electrodes are in focus. The design of other battery components, namely electrolytes and separators are also discussed. Poor performance of O electrocatalysts and the lack of the long-term stability of Zn electrodes and electrolytes remain major challenges. Finally, recommendations regarding the testing routines and materials design are provided. It is hoped that this up-to-date account will help to shape the future research activities toward the development of practical electrically rechargeable Zn-air batteries with extended lifetime and superior performance.

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“…Although achieving great development of transition‐metal oxides, the electrocatalytic performance is still unsatisfactory, which is heavily hampered by some important drawbacks and limitations, including the inherent low conductivity and serious aggregation of nanoparticles. Carbon‐based hybrid bifunctional catalyst typically consists of strongly coupled oxide nanomaterials and functionalized carbons are then put forward to overcome that . For example, by a simple electrospinning technique, Prabu et al reported a new bifunctional ORR and OER catalyst, in which, perovskite LaTi 0.65 Fe 0.35 O 3− δ (LTFO) nanoparticles were entangled both at the surface and within the nitrogen‐doped carbon nanorods (NCNRs).…”

Section: Bifunctional Catalystsmentioning

confidence: 99%

Recent Advances toward the Rational Design of Efficient Bifunctional Air Electrodes for Rechargeable Zn–Air Batteries

Meng

Liu

Zhang

et al. 2018

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173

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Large-scale application of renewable energy and rapid development of electric vehicles have brought unprecedented demand for advanced energy-storage/conversion technologies and equipment. Rechargeable zinc (Zn)-air batteries represent one of the most promising candidates because of their high energy density, safety, environmental friendliness, and low cost. The air electrode plays a key role in managing the many complex physical and chemical processes occurring on it to achieve high performance of Zn-air batteries. Herein, recent advances of air electrodes from bifunctional catalysts to architectures are summarized, and their advantages and disadvantages are discussed to underline the importance of progress in the evolution of bifunctional air electrodes. Finally, some challenges and the direction of future research are provided for the optimized design of bifunctional air electrodes to achieve high performance of rechargeable Zn-air batteries.

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Hierarchical pore-in-pore and wire-in-wire catalysts for rechargeable Zn– and Li–air batteries with ultra-long cycle life and high cell efficiency

Abstract: Inexpensive hierarchical oxygen reduction and oxygen evolution reaction (ORR/OER) catalysts offer higher cell efficiency and much longer cycle life than Pt/C + IrO2 bifunctional catalysts in metal–air batteries.

Cited by 107 publications

References 46 publications

Interconnected Hierarchically Porous Fe, N-Codoped Carbon Nanofibers as Efficient Oxygen Reduction Catalysts for Zn–Air Batteries

Interconnected Hierarchically Porous Fe, N-Codoped Carbon Nanofibers as Efficient Oxygen Reduction Catalysts for Zn–Air Batteries

Recent Advances in Materials and Design of Electrochemically Rechargeable Zinc–Air Batteries

Recent Advances toward the Rational Design of Efficient Bifunctional Air Electrodes for Rechargeable Zn–Air Batteries

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