Advanced Oxygen Electrocatalysis in Energy Conversion and Storage

Yang, Huan; Han, Xiaotong; Douka, Abdoulkader Ibro; Huang, Lei; Gong, Lanqian; Xia, Chenfeng; Park, Ho Seok; Xia, Bao Yu

doi:10.1002/adfm.202007602

Cited by 96 publications

(87 citation statements)

References 290 publications

(223 reference statements)

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“…The electrochemical oxygen evolution reaction (OER) is of very high significance for the promising sustainable energy conversion and storage devices/systems in the modern society, including electrolyzers, rechargeable metal‐air batteries and carbon dioxide/nitrogen reduction cells [1–4] . To promote the overall energy conversion and storage efficiencies of these devices/systems, an efficient oxygen catalyst with high activity and good long‐term durability is essentially required to overcome the thermodynamic barriers of the relevant multiple proton‐coupled electron transfer during the electrochemical OER process [5–8] .…”

Section: Figurementioning

confidence: 99%

Synergetic Cobalt‐Copper‐Based Bimetal–Organic Framework Nanoboxes toward Efficient Electrochemical Oxygen Evolution

et al. 2021

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The development of efficient oxygen electrocatalysts and understanding their underlying catalytic mechanism are of significant importance for the high‐performance energy conversion and storage technologies. Herein, we report novel CoCu‐based bimetallic metal–organic framework nanoboxes (CoCu‐MOF NBs) as promising catalysts toward efficient electrochemical oxygen evolution reaction (OER), fabricated via a successive cation and ligand exchange strategy. With the highly exposed bimetal centers and the well‐designed architecture, the CoCu‐MOF NBs show excellent OER activity and stability, with a small overpotential of 271 mV at 10 mA cm−2 and a high turnover frequency value of 0.326 s−1 at an overpotential of 300 mV. In combination of quasi in situ X‐ray absorption fine structure spectroscopy and density‐functional theory calculations, the post‐formed CoCu‐based oxyhydroxide analogue during OER is believed to account for the high OER activity of CoCu‐MOF NBs, where the electronic synergy between Co and neighbouring Cu atoms promotes the O−O bond coupling toward fast OER kinetics.

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Section: Figurementioning

confidence: 99%

Synergetic Cobalt‐Copper‐Based Bimetal–Organic Framework Nanoboxes toward Efficient Electrochemical Oxygen Evolution

et al. 2021

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“…On the basis of these metal composite catalysts, the catalytic activity can be further improved by introducing metal materials. [ 75–77 ] The metal elements can enhance the graphitization degree of carbon materials during the pyrolysis process, promote the electron transfer, and have a synergetic effect with the carbon nanostructure to from more active sites in the catalysts.…”

Section: Electrospinning In Zabsmentioning

confidence: 99%

Recent Advances on Electrospun Nanomaterials for Zinc–Air Batteries

Zhou

Douka

et al. 2021

Small Science

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Zinc–air batteries have received increasing attention in energy storage and conversion technologies. However, several challenges still emerge in the development of high‐level zinc–air batteries. In this regard, electrospun materials with unique nanostructures and characteristics are applied in the high‐performance zinc–air batteries. This work reviews recent progress of electrospun technologies for their diverse application in novel zinc anodes, separators, and air cathodes in zinc–air batteries. After a brief introduction, the fundamental principle and technological parameter of electrospinning technology are discussed, and then multifunctional electrospun nanofiber materials including their fabrication procedures, structures, and electrochemical properties are reviewed in the application of zinc–air batteries. Finally, urgent challenges and opportunities are comprehensively proposed for the electrospun nanomaterials in zinc–air batteries. This work intends to offer readable report for electrospun technology toward their application in zinc–air batteries, which inspires more fabrication approaches and material innovations in energy conversion and storage technologies.

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“…Nevertheless, their industrial applications are severely hindered by the sluggish electrocatalytic kinetics of the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) during the charge/discharge process 4–7 . Ir/Ru‐ and Pt‐based materials are recognized as efficient electrocatalysts for the OER and ORR, respectively, but their high cost and poor stability greatly limit their implementation 8–10 . Moreover, these noble metal‐based electrocatalysts suffer from inferior bifunctionality and sluggish kinetics for reverse reactions involved in the charge/discharge cycles of rechargeable ZABs 11 .…”

Section: Introductionmentioning

confidence: 99%

Electronically coupled layered double hydroxide/MXene quantum dot metallic hybrids for high‐performance flexible zinc–air batteries

Han

Xiong

et al. 2021

InfoMat

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Precise control of the local electronic structure and properties of electrocatalysts is important for enhancing the multifunctionality and durability of electrocatalysts and for correlating the structure/chemistry with the catalytic properties. Herein, we report electronically coupled metallic hybrids of NiFe layered double hydroxide nanosheet/Ti3C2 MXene quantum dots deposited on a nitrogen‐doped graphene surface (LDH/MQD/NG) for high‐performance flexible Zn–air batteries (ZABs). As verified from the Mott–Schottky and Nyquist plots, as well as spectroscopic, electrochemical, and computational analyses, the electronic and chemical coupling of LDH/MQD/NG modulates the local electronic and surface structure of the active LDH to provide metallic conductivity and abundant active sites, leading to significantly improved bifunctional activity and electrocatalytic kinetics. The rechargeable ZABs with LDH/MQD/NG hybrids are superior to the previous LDH‐based ZABs, demonstrating a high power density (113.8 mW cm−2) and excellent cycle stability (150 h at 5 mA cm−2). Moreover, the corresponding quasi solid‐state ZABs are completely flexible and practical, affording a high power density of 57.6 mW cm−2 even in the bent state, and in real‐life operation of tandem cells for powering various electronic devices.

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Advanced Oxygen Electrocatalysis in Energy Conversion and Storage

Cited by 96 publications

References 290 publications

Synergetic Cobalt‐Copper‐Based Bimetal–Organic Framework Nanoboxes toward Efficient Electrochemical Oxygen Evolution

Synergetic Cobalt‐Copper‐Based Bimetal–Organic Framework Nanoboxes toward Efficient Electrochemical Oxygen Evolution

Recent Advances on Electrospun Nanomaterials for Zinc–Air Batteries

Electronically coupled layered double hydroxide/MXene quantum dot metallic hybrids for high‐performance flexible zinc–air batteries

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