Atomically Dispersed Fe–Co Dual Metal Sites as Bifunctional Oxygen Electrocatalysts for Rechargeable and Flexible Zn–Air Batteries

ACS Catalysis, Год журнала: 2022, Номер 12(2), С. 1216 - 1227

Опубликована: Янв. 5, 2022

Single-metal site catalysts have exhibited highly efficient electrocatalytic properties due to their unique coordination environments and adjustable local structures for reactant adsorption electron transfer. They been widely studied many electrochemical reactions, including oxygen reduction reaction (ORR) evolution (OER). However, it remains a significant challenge realize high-efficiency bifunctional catalysis (ORR/OER) with single-metal-type active sites. Herein, we report atomically dispersed Fe–Co dual metal sites (FeCo–NC) derived from Fe Co co-doped zeolitic imidazolate frameworks (ZIF-8s), aiming build up multiple ORR/OER catalysts. The FeCo–NC catalyst shows excellent catalytic activity in alkaline media the ORR (E1/2 = 0.877 V) OER (Ej=10 1.579 V). Moreover, its outstanding stability during is comparable noble-metal (Pt/C RuO2). atomic dispersion state, structure, charge density difference of were characterized determined using advanced physical characterization functional theory (DFT) calculations. FeCo–N6 moieties are likely main simultaneously improved performance relative traditional single We further incorporated into an air electrode fabricating rechargeable flexible Zn–air batteries, generating superior power (372 mW cm–2) long-cycle (over 190 h) stability. This work would provide method design synthesize multi-metal electrocatalysis.

Язык: Английский

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Phase‐Reconfiguration‐Induced NiS/NiFe₂O₄ Composite for Performance‐Enhanced Zinc−Air Batteries

Advanced Materials, Год журнала: 2022, Номер 34(15)

Опубликована: Фев. 16, 2022

Constructing composite structures is an essential approach for obtaining multiple functionalities in a single entity. Available synthesis methods of the composites need to be urgently exploited; especially situ construction. Here, NiS/NiFe2 O4 through local metal-S coordination at interface reported, which derived from phase reconstruction highly defective matrix. X-ray absorption fine structure confirms that long-range order broken via and, by using electron energy loss spectroscopy, introduction interfaces during irradiation plasma identified. Density functional theory (DFT) calculations reveal reconfiguration crucial synergistically reducing energetic barriers and accelerating reaction kinetics toward catalyzing oxygen evolution (OER). As result; it leads overpotential 230 mV @10 mA cm-2 OER half-wave potential 0.81 V reduction (ORR); as well excellent zinc-air battery (ZAB) performance with power density 148.5 mW . This work provides new compositing strategy terms fast bifunctional catalysts.

Язык: Английский

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Rational Design and Spontaneous Sulfurization of NiCo‐(oxy)Hydroxysulfides Nanosheets with Modulated Local Electronic Configuration for Enhancing Oxygen Electrocatalysis

Advanced Energy Materials, Год журнала: 2022, Номер 12(15)

Опубликована: Фев. 26, 2022

Abstract Transition metal chalcogenides (TMCs) have been identified as pre‐electrocatalysts for the oxygen evolution reaction (OER) and high valent TMs in situ generated oxyhydroxides are considered to be real OER catalytic center. However, role of chalcogens process has ignored not fully elucidated. Herein, it is discovered that about 2.8–3.5% remain oxidized derivatives at a steady state, which plays vital enhancing activity. A facile spontaneous sulfurizing method developed synthesize sulfur‐doped NiCo‐(oxy)hydroxysulfides (NCOSH) nanosheets, sulfur can directly bond with high‐valence keep them stable catalysis. Theoretical experimental results suggest S‐coordination NCOSH cause length strengthening electronic modulation between TM‐S TM‐O, thus oxidation activity stability NCOSH. Consequently, as‐obtained exhibits superior bifunctional activities durability electrocatalytic reactions, also serves superb air cathode rechargeable solid state Zn‐air batteries. This work sheds light on rational design (oxy)hydroxysulfides efficient electrocatalysts gains deeper fundamental insights mechanism S oxyhydroxysulfides diverse electrochemical applications.

Язык: Английский

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Recent advances and perspectives for Zn-based batteries: Zn anode and electrolyte

Deleted Journal, Год журнала: 2022, Номер 2, С. e9120039 - e9120039

Опубликована: Ноя. 8, 2022

Zn-based batteries have attracted extensive attention due to their high theoretical energy density, safety, abundant resources, environmental friendliness, and low cost. They are a new storage conversion technology with significant development potential been widely used in renewable portable electronic devices. Considerable attempts devoted improving the performance of batteries. Specifically, battery cycle life efficiency can be improved by electrolyte modification construction highly efficient rechargeable Zn anodes. This review compiles progress research related anodes electrolytes, especially last five years. will introduce fundamental concepts, summarize recent development, inspire further systematic for high-performance future.

Язык: Английский

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Preconstructing Asymmetric Interface in Air Cathodes for High‐Performance Rechargeable Zn–Air Batteries

Advanced Materials, Год журнала: 2022, Номер 34(11)

Опубликована: Янв. 6, 2022

Rechargeable zinc-air batteries afford great potential toward next-generation sustainable energy storage. Nevertheless, the oxygen redox reactions at air cathode are highly sluggish in kinetics to induce poor efficiency and limited cycling lifespan. Air cathodes with asymmetric configurations significantly promote electrocatalytic of loaded electrocatalysts, whereas rational synthetic methodology effectively fabricate remains insufficient. Herein, a strategy interface preconstruction is proposed for high-performance rechargeable batteries. Concretely, preconstructed by introducing immiscible organic-water diphases within cathode, which electrocatalysts situ formed achieve an configuration. The as-fabricated realize high working rates 50 mA cm-2 , long stability 3400 cycles 10 over 100 under harsh conditions 25 mAh . Moreover, universal many systems can be easily scaled up. This work provides effective advanced promotes performance

Язык: Английский

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Advanced MOF-derived carbon-based non-noble metal oxygen electrocatalyst for next-generation rechargeable Zn-air batteries

Coordination Chemistry Reviews, Год журнала: 2022, Номер 473, С. 214839 - 214839

Опубликована: Сен. 20, 2022

Язык: Английский

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Recent Advances and Challenges Toward Application of Fibers and Textiles in Integrated Photovoltaic Energy Storage Devices

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Янв. 20, 2023

Flexible microelectronic devices have seen an increasing trend toward development of miniaturized, portable, and integrated as wearable electronics which the requirement for being light weight, small in dimension, suppleness. Traditional three-dimensional (3D) two-dimensional (2D) gadgets fail to effectively comply with these necessities owing their stiffness large weights. Investigations come up a new family one-dimensional (1D) flexible fiber-based electronic (FBEDs) comprising power storage, energy-scavenging, implantable sensing, displays gadgets. However, manufacturing are still challenge radius, flexibility, low weave ability integration textile electronics. This paper will provide detailed review on importance substrates devices, intrinsic property requirements, fabrication classification applications energy harvesting, storage other devices. Fiber- textile-based bulk/scalable fabrications, encapsulation, testing reviewed presented future research ideas enhance commercialization

Язык: Английский

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Rechargeable Zinc–Air Batteries: Advances, Challenges, and Prospects

Small, Год журнала: 2023, Номер 20(4)

Опубликована: Сен. 15, 2023

Abstract Rechargeable zinc–air batteries (Re‐ZABs) are one of the most promising next‐generation that can hold more energy while being cost‐effective and safer than existing devices. Nevertheless, zinc dendrites, non‐portability, limited charge–discharge cycles have long been obstacles to commercialization Re‐ZABs. Over past 30 years, milestone breakthroughs made in technical indicators (safety, high density, battery life), components (air cathode, anode, gas diffusion layer), configurations (flexibility portability), however, a comprehensive review on advanced design strategies for Re‐ZABs system from multiple angles is still lacking. This underscores progress proposed so far pursuit high‐efficiency system, including aspects rechargeability (from primary rechargeable), air cathode unifunctional bifunctional), anode dendritic stable), electrolytes aqueous non‐aqueous), non‐portable portable), industrialization laboratorial practical). Critical appraisals modification approaches (such as surface/interface modulation, nanoconfinement catalysis, defect electrochemistry, synergistic electrocatalysis, etc.) highlighted flexible with good sustainability density. Finally, insights further rendered properly future research directions batteries.

Язык: Английский

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Rational Design of Wood‐Structured Thick Electrode for Electrochemical Energy Storage

Advanced Functional Materials, Год журнала: 2022, Номер 32(35)

Опубликована: Июнь 28, 2022

Abstract It is a natural choice to realize the vision of wood‐inspired functional materials for energy engineering. Apart from being naturally abundant, renewable, and biodegradable, wood‐based devices possess hierarchically porous structures, mechanical integrity flexibility, tunable functionalities, holding potential significantly push boundaries efficient storage conversion. Meanwhile, hunting batteries with superior energy/power output redeem ever‐growing demand has ignited thick electrode conception, which deemed as burgeoning technic maneuver maximum active material loading at device‐scale. As an integrated carbonaceous scaffold hierarchical architecture aligned channels, wood ameliorates ion/electron conductivities strengthen charge transfer kinetics. In this review, rational design unique prospects in construction electrodes that concerns over structural optimization low‐tortuosity cell configuration are summarized. To trap structure‐feature‐performance interplays, advanced opens avenue emerging chemistries such supercapacitors, lithium‐ion/metal post‐rechargeable also spotlighted standpoint on task‐tailored modification. Ultimately, blueprint ongoing challenges upcoming opportunities wood‐structured drawn broaden their brand‐new talents.

Язык: Английский

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Synergistic cooperation between atomically dispersed Zn and Fe on porous nitrogen-doped carbon for boosting oxygen reduction reaction

Applied Catalysis B Environment and Energy, Год журнала: 2023, Номер 335, С. 122875 - 122875

Опубликована: Май 13, 2023

Язык: Английский

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