Advances in the Development of Single‐Atom Catalysts for High‐Energy‐Density Lithium–Sulfur Batteries

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(30)

Published: March 3, 2022

Abstract Although lithium–sulfur (Li–S) batteries are promising next‐generation energy‐storage systems, their practical applications limited by the growth of Li dendrites and lithium polysulfide shuttling. These problems can be mitigated through use single‐atom catalysts (SACs), which exhibit advantages maximal atom utilization efficiency (≈100%) unique catalytic properties, thus effectively enhancing performance electrode materials in devices. This review systematically summarizes recent progress SACs intended for Li‐metal anodes, S cathodes, separators, briefly introducing operating principles Li–S batteries, action mechanisms corresponding SACs, fundamentals activity, then comprehensively describes main strategies synthesis. Subsequently, operation reinforced as well other metal–S individually illustrated, major challenges usage future development directions presented.

Language: Английский

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High-entropy single-atom activated carbon catalysts for sustainable oxygen electrocatalysis

Nature Sustainability, Journal Year: 2023, Volume and Issue: 6(7), P. 816 - 826

Published: March 30, 2023

Language: Английский

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Simultaneously Engineering the Synergistic-Effects and Coordination-Environment of Dual-Single-Atomic Iron/Cobalt-sites as a Bifunctional Oxygen Electrocatalyst for Rechargeable Zinc-Air Batteries

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(4), P. 2313 - 2325

Published: Jan. 30, 2023

Single-atom introduced carbon nanomaterials show favorable oxygen-reduction reaction (ORR) and oxygen-evolution (OER) performance for renewable energy applications. Nevertheless, the electronic-structure regulation by decorating heterogeneous single-metal-atoms engineering of a single-atom active-sites' microenvironment need to be optimized simultaneously, which is challenging. Herein, we develop an atomic-interfacial-regulation approach fabricate dual single Fe/Co atoms synchronized with both nitrogen/sulfur on defective/graphitic/porous nanosheets (Fe,Co/DSA-NSC). The unsymmetrically organized N S coordinated bridged atomic-sites [Fe-(N2S)/Co-(N2S) moiety] are established prompt charge-transfer, lowering barrier oxygenated reaction-intermediates leading boost reaction-kinetics. As estimated, Fe,Co/DSA-NSC exhibits improved ORR/OER activity higher half-wave potential lower overpotential (E1/2 = 879 mV η10 210 mV, respectively) also good cycling stability toward zinc-air batteries. This discovery hence provides widespread scheme synergistic-principles dual-single-atom catalysts controlled

Language: Английский

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Insights into the solvation chemistry in liquid electrolytes for lithium-based rechargeable batteries

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(15), P. 5255 - 5316

Published: Jan. 1, 2023

Lithium-based rechargeable batteries have dominated the energy storage field and attracted considerable research interest due to their excellent electrochemical performance. As indispensable ubiquitous components, electrolytes play a pivotal role in not only transporting lithium ions, but also expanding stable potential window, suppressing side reactions, manipulating redox mechanism, all of which are closely associated with behavior solvation chemistry electrolytes. Thus, comprehensively understanding is significant importance. Here we critically reviewed development various lithium-based including lithium-metal (LMBs), nonaqueous lithium-ion (LIBs), lithium-sulfur (LSBs), lithium-oxygen (LOBs), aqueous (ALIBs), emphasized effects interactions between cations, anions, solvents on chemistry, functions different types (strong solvating electrolytes, moderate weak electrolytes) performance mechanism abovementioned batteries. Specifically, stability electrode-electrolyte interphases, suppression dendrites LMBs, inhibition co-intercalation LIBs, improvement anodic at high cut-off voltages LIBs ALIBs, regulation pathways LSBs LOBs, hydrogen/oxygen evolution reactions LOBs thoroughly summarized. Finally, review concludes prospective outlook, where practical issues advanced situ/operando techniques illustrate theoretical calculation simulation such as "material knowledge informed machine learning" "artificial intelligence (AI) + big data" driven strategies for high-performance been proposed.

Language: Английский

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Designing Electrophilic and Nucleophilic Dual Centers in the ReS₂ Plane toward Efficient Bifunctional Catalysts for Li-CO₂ Batteries

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(7), P. 3106 - 3116

Published: Feb. 11, 2022

Two-dimensional transition metal dichalcogenides (TMDCs) show great potential as efficient catalysts for Li-CO2 batteries. However, the basal plane engineering on TMDCs toward bifunctional batteries is still poorly understood. In this work, density functional theory calculations reveal that nucleophilic N dopants and electrophilic S vacancies in ReS2 tailor interactions with Li atoms C/O intermediates, respectively. The dual centers suitable adsorption all intermediates during discharge charge, resulting a small energy barrier rate-determining step. Thus, an catalyst produced As result, optimal achieves ultrasmall voltage gap of 0.66 V ultrahigh efficiency 81.1% at 20 μA cm-2, which superior to those previous under similar conditions. introduction provides new avenues designing excellent

Language: Английский

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Rational Design of Flexible Zn-Based Batteries for Wearable Electronic Devices

ACS Nano, Journal Year: 2023, Volume and Issue: 17(3), P. 1764 - 1802

Published: Jan. 30, 2023

The advent of 5G and the Internet Things has spawned a demand for wearable electronic devices. However, lack suitable flexible energy storage system become "Achilles' Heel" Additional problems during transformation battery structure from conventional to also present severe challenge design. Flexible Zn-based batteries, including Zn-ion batteries Zn–air have long been considered promising candidates due their high safety, eco-efficiency, substantial reserve, low cost. In past decade, researchers come up with elaborate designs each portion improve ionic conductivities, mechanical properties, environment adaptabilities, scalable productions. It would be helpful summarize reported strategies compare pros cons facilitate further research toward commercialization batteries. this review, current progress in developing is comprehensively reviewed, electrolytes, cathodes, anodes, discussed terms synthesis, characterization, performance validation. By clarifying challenges design, we methodology previous investigations propose future development. end, paradigm summarized fit burgeoning requirement devices an iterative process, which will benefit development

Language: Английский

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Catalytic effect in Li-S batteries: From band theory to practical application

Materials Today, Journal Year: 2022, Volume and Issue: 57, P. 84 - 120

Published: June 9, 2022

Language: Английский

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Flexible Zinc–Air Batteries with Ampere‐Hour Capacities and Wide‐Temperature Adaptabilities

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(13)

Published: Jan. 30, 2023

Flexible Zn-air batteries (FZABs) have significant potentials as efficient energy storage devices for wearable electronics because of their safeties and high energy-to-cost ratios. However, application is limited by short cycle lives, low discharge capacities per cycle, charge/discharge polarizations. Accordingly, herein, a poly(sodium acrylate)-polyvinyl alcohol (PANa-PVA)-ionic liquid (IL) hydrogel (PANa-PVA-IL) prepared using hygroscopic IL, 1-ethyl-3-methylimidazolium chloride, an additive twin-chain PANa-PVA. PANa-PVA-IL exhibits conductivity 306.9 mS cm-1 water uptake 2515 wt% at room temperature. Moreover, low-cost bifunctional catalyst, namely, Co9 S8 nanoparticles anchored on N- S-co-doped activated carbon black pearls 2000 (Co9 -NSABP), synthesized, which demonstrates O2 reversibility potential gap 0.629 V. FZABs based -NSABP demonstrate 1.67 mAh cm-2 long lives 330 h. Large-scale flexible rechargeable pouch cells exhibit total 1.03 Ah densities 246 Wh kgcell-1 . This study provides new information about hydrogels with ionic conductivities uptakes should facilitate the in electronics.

Language: Английский

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Electrocatalyst Modulation toward Bidirectional Sulfur Redox in Li–S Batteries: From Strategic Probing to Mechanistic Understanding

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 12(29)

Published: June 7, 2022

Abstract Electrocatalyst design has stimulated considerable attention and strenuous effort to tackle a multitude of detrimental issues in lithium–sulfur (Li–S) systems, mainly pertaining the severe polysulfide shuttle effect sluggish sulfur redox kinetics. In this context related advances expediting bidirectional reactions have lately surged. Nonetheless, structure–activity correlation electrocatalytic mechanism remain rather elusive, as result elusory active sites, complicated aprotic environments, multistep conversion pathways. This review summarizes burgeoning strategies modulation heterogeneous homogeneous electrocatalysts, wherein advanced electrokinetic measurements, operando instrumental probing, theoretical simulations are elucidated with an emphasis on deciphering electrochemistry. Notably, “3s” electrocatalysis model is proposed deepen mechanistic understanding realm. Finally, development roadmap sketched future research layouts discussed, aiming essence, realize favorable kinetics ultimately bridge gap between reality ideal systems working Li–S batteries.

Language: Английский

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Rare‐Earth Single‐Atom Catalysts: A New Frontier in Photo/Electrocatalysis

Small Methods, Journal Year: 2022, Volume and Issue: 6(8)

Published: June 25, 2022

Abstract Single‐atom catalysts (SACs) provide well‐defined active sites with 100% atom utilization, and can be prepared using a wide range of support materials. Therefore, they are attracting global attention, especially in the fields energy conversion storage. To date, research has focused on transition‐metal precious‐metal‐based SACs. More recently, rare‐earth (RE)‐based SACs have emerged as new frontier photo/electrocatalysis owing to their unique electronic structure arising from spin‐orbit coupling 4f valence orbitals, unsaturated coordination environment, behavior charge‐transport bridges. However, systematic review role RE sites, catalytic mechanisms, synthetic methods for is lacking. this review, latest developments having applications summarized discussed. First, theoretical advantages briefly introduced, focusing roles orbitals coupled levels. In addition, most recent progress several important photo/electrocatalytic reactions corresponding mechanisms Further, strategies production reported. Finally, challenges development highlighted, along future directions perspectives.

Language: Английский

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