A Composite Bifunctional Oxygen Electrocatalyst for High‐Performance Rechargeable Zinc–Air Batteries

Liu, Jia‐Ning; Li, Bo‐Quan; Chang-xin, Zhao; Yu, Jingkun; Zhang, Qiang

doi:10.1002/cssc.201903071

Cited by 31 publications

(14 citation statements)

References 71 publications

(106 reference statements)

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“…Considering the different mechanisms of ORR and OER that require distinct active sites, the electrocatalyst composition strategy that integrates two or more types of components affords the possibility for respective active site selection and therefore exhibits generally superior bifunctional activity compared with other design strategies. [43][44][45] Specifically, Chen and co-workers integrated Fe,Co-bimetallic oxide with N-doped graphene into a composite bifunctional electrocatalyst with a ΔE of 0.78 V, achieving comparable performance with the noblemetal-based benchmark. [46] Recently, Liu et al synthesized a composite bifunctional electrocatalysts with Co 2 P and heteroatom-doped porous carbon to achieve a ΔE of 0.713 V, representing the current state-of-the-art technique.…”

Section: Introductionmentioning

confidence: 99%

A ΔE = 0.63 V Bifunctional Oxygen Electrocatalyst Enables High‐Rate and Long‐Cycling Zinc–Air Batteries

et al. 2021

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Rechargeable zinc–air batteries constitute promising next‐generation energy storage devices due to their intrinsic safety, low cost, and feasibility to realize high cycling current density and long cycling lifespan. Nevertheless, their cathodic reactions involving oxygen reduction and oxygen evolution are highly sluggish in kinetics, requiring high‐performance noble‐metal‐free bifunctional electrocatalysts that exceed the current noble‐metal‐based benchmarks. Herein, a noble‐metal‐free bifunctional electrocatalyst is fabricated, which demonstrates ultrahigh bifunctional activity and renders excellent performance in rechargeable zinc–air batteries. Concretely, atomic Co–N–C and NiFe layered double hydroxides (LDHs) are respectively selected as oxygen reduction and evolution active sites and are further rationally integrated to afford the resultant CoNC@LDH composite electrocatalyst. The CoNC@LDH electrocatalyst exhibits remarkable bifunctional activity delivering an indicator ΔE of 0.63 V, far exceeding the noble‐metal‐based Pt/C+Ir/C benchmark (ΔE = 0.77 V) and most reported electrocatalysts. Correspondingly, ultralong lifespan (over 3600 cycles at 10 mA cm−2) and excellent rate performances (cycling current density at 100 mA cm−2) are achieved in rechargeable zinc–air batteries. This work highlights the current advances of bifunctional oxygen electrocatalysis and endows high‐rate and long‐cycling rechargeable zinc–air batteries for efficient sustainable energy storage.

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Section: Introductionmentioning

confidence: 99%

A ΔE = 0.63 V Bifunctional Oxygen Electrocatalyst Enables High‐Rate and Long‐Cycling Zinc–Air Batteries

et al. 2021

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“…Carbon materials are promising candidates to improve electrical conductivity and simultaneously work as metal oxide supports. [ 53,54 ] In addition, heteroatom doping, binary, and ternary mixed oxides have also been explored to improve intrinsic catalytic activity. [ 55 ]…”

Section: Bifunctional Oxygen Electrocatalysts For Flexible Zabsmentioning

confidence: 99%

Air Electrodes for Flexible and Rechargeable Zn−Air Batteries

et al. 2021

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Rechargeable Zn−air batteries (ZABs) have attracted increasing attention as one of the most promising future energy power sources due to their relatively high specific energy density, environmental friendliness, safety, and low cost. In particular, flexible ZABs are desirable for portable and wearable electronic devices, in which the cathode can utilize air directly from the atmosphere with significantly enhanced energy density. Therefore, the air electrode consisting of oxygen electrocatalysts is the most critical component in flexible ZABs, significantly governing the overall battery performance and cost. This review highlights recent achievements in designing efficient oxygen electrocatalysts and air electrodes for rechargeable and flexible ZABs. First, the most significant innovations of recent battery configurations to improve flexibility and battery performance are introduced. Then, oxygen electrocatalysts developed for fabricating high‐performance air cathodes in flexible ZABs in terms of catalyst properties, unique nanostructures, and morphologies are emphasized. Furthermore, effective architectures of air electrodes are discussed to highlight structural stability and charge/mass transports for improving battery performance. Finally, a perspective for designing durable and high‐power air electrodes for flexible ZABs is provided, aiming to summarize current challenges and possible solutions to commercialize the exciting battery technology eventually.

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“…It can occur through either two electrons pathway leading to the formation of water peroxides or four electrons pathway producing the OH − in alkaline medium 65 . Due to four electrons pathway is preferable for efficient ORR process in energy conversion devices, we mainly focus on the four electrons pathway (O 2 + 2H 2 O + 4e − → 4OH − ) in the following sections 66‐69 …”

Section: Oxygen Electrocatalysis In Rechargeable Zabsmentioning

confidence: 99%

Transition metal/carbon hybrids for oxygen electrocatalysis in rechargeable zinc‐air batteries

Douka

Yang

Huang

et al. 2020

EcoMat

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Zinc‐air batteries (ZABs) could be an ideal candidate for challenging energy conversion and storage technology. Usually, the crucial oxygen reduction reaction and oxygen evolution reaction are naturally lethargic and require efficient catalysts to kinetically boost the energy conversion processes to achieve the practicable ZABs application. Transition‐metal/carbon hybrid catalysts show excellent potentials in electrocatalysis, and they have been developed into cost‐effective and scalable oxygen electrocatalyst alternatives for expensive and scarcer noble metal ones in rechargeable ZABs. Herein we summarize recent achievements in transition metal/carbon hybrids for oxygen electrocatalysis. These catalysts mainly fall into two categories by the integrated metal/metal oxides nanoparticles and atomically dispersed transition metal/carbon matrix. We focus on the relationship between structure and performance with their synthesis strategies. Their application in rechargeable ZABs are also comprehensively discussed. Finally, the perspectives on transition metal/carbon hybrids for oxygen electrocatalysis are presented for the future challenges in rechargeable ZABs.

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A Composite Bifunctional Oxygen Electrocatalyst for High‐Performance Rechargeable Zinc–Air Batteries

Cited by 31 publications

References 71 publications

A ΔE = 0.63 V Bifunctional Oxygen Electrocatalyst Enables High‐Rate and Long‐Cycling Zinc–Air Batteries

A ΔE = 0.63 V Bifunctional Oxygen Electrocatalyst Enables High‐Rate and Long‐Cycling Zinc–Air Batteries

Air Electrodes for Flexible and Rechargeable Zn−Air Batteries

Transition metal/carbon hybrids for oxygen electrocatalysis in rechargeable zinc‐air batteries

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