Ordered Mesoporous Carbon Grafted MXene Catalytic Heterostructure as Li-Ion Kinetic Pump toward High-Efficient Sulfur/Sulfide Conversions for Li–S Battery

ACS Nano, Год журнала: 2023, Номер 17(2), С. 1653 - 1662

Опубликована: Янв. 6, 2023

Lithium–sulfur (Li–S) batteries exhibit unparalleled theoretical capacity and energy density than conventional lithium ion batteries, but they are hindered by the dissatisfactory "shuttle effect" sluggish conversion kinetics owing to low transport kinetics, resulting in rapid fading. Herein, a catalytic two-dimensional heterostructure composite is prepared evenly grafting mesoporous carbon on MXene nanosheet (denoted as OMC-g-MXene), serving interfacial kinetic accelerators Li–S batteries. In this design, grafted can not only prevent stack of nanosheets with enhanced mechanical property also offer facilitated pump for accelerating diffusion. Meanwhile, exposed defect-rich OMC-g-MXene inhibits polysulfide shuttling chemical interactions between polysulfides thus simultaneously enhances electrochemical efficiency, fully investigated situ/ex situ characterizations. Consequently, cells pumps achieve high cycling (966 mAh g–1 at 0.2 C after 200 cycles), superior rate performance (537 5 C), an ultralow decaying 0.047% per cycle 800 cycles 1 C. Even employed sulfur loading 7.08 mg cm–2 under lean electrolyte, ultrahigh areal 4.5 acquired, demonstrating future practical application.

Язык: Английский

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Insights on rational design and energy storage mechanism of Mn-based cathode materials towards high performance aqueous zinc-ion batteries

Coordination Chemistry Reviews, Год журнала: 2023, Номер 479, С. 215009 - 215009

Опубликована: Янв. 10, 2023

Язык: Английский

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How About Vanadium‐Based Compounds as Cathode Materials for Aqueous Zinc Ion Batteries?

Advanced Science, Год журнала: 2023, Номер 10(12)

Опубликована: Янв. 22, 2023

Aqueous zinc-ion batteries (AZIBs) stand out among many monovalent/multivalent metal-ion as promising new energy storage devices because of their good safety, low cost, and environmental friendliness. Nevertheless, there are still great challenges to exploring new-type cathode materials that suitable for Zn

Язык: Английский

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Recent progress and challenges of Zn anode modification materials in aqueous Zn-ion batteries

Coordination Chemistry Reviews, Год журнала: 2023, Номер 485, С. 215142 - 215142

Опубликована: Март 28, 2023

Язык: Английский

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Recent progress of MOF/MXene-based composites: Synthesis, functionality and application

Coordination Chemistry Reviews, Год журнала: 2023, Номер 490, С. 215208 - 215208

Опубликована: Май 18, 2023

Язык: Английский

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Embedding Atomically Dispersed Iron Sites in Nitrogen‐Doped Carbon Frameworks‐Wrapped Silicon Suboxide for Superior Lithium Storage

Advanced Science, Год журнала: 2022, Номер 10(4)

Опубликована: Дек. 5, 2022

Abstract Silicon suboxide (SiO x ) has attracted widespread interest as Li‐ion battery (LIB) anodes. However, its undesirable electronic conductivity and apparent volume effect during cycling impede practical applications. Herein, sustainable rice husks (RHs)‐derived SiO 2 are chosen a feedstock to design /iron–nitrogen co‐doped carbon (Fe–N–C) materials. Using facile electrospray‐carbonization strategy, nanoparticles (NPs) encapsulated in the nitrogen‐doped (N–C) frameworks decorating atomically dispersed iron sites. Systematic characterizations including high‐angle annular dark‐field scanning transmission electron microscopy (HAADF‐STEM) X‐ray absorption fine structure (XAFS) verify existence of Fe single atoms typical coordination environment. Benefiting from structural compositional merits, /Fe–N–C anode delivers significantly improved discharge capacity 799.1 mAh g −1 , rate capability, exceptional durability, compared with pure /N–C, which been revealed by density functional theory (DFT) calculations. Additionally, electrochemical tests situ diffraction (XRD) analysis reveal oxidation Li Si phase storage mechanism. The synthetic strategy is universal for synthesis metal atoms/clusters N–C NPs. Meanwhile, this work provides impressive insights into developing various LIB materials suffering inferior huge fluctuations.

Язык: Английский

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2D MOF‐assisted Pyrolysis‐displacement‐alloying Synthesis of High‐entropy Alloy Nanoparticles Library for Efficient Electrocatalytic Hydrogen Oxidation

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(33)

Опубликована: Июнь 30, 2023

Multimetallic alloy nanoparticles (NPs) have received considerable attention in various applications due to their compositional variability and exceptional properties. However, the complexity of both general synthesis structure-activity relationships remain long-standing challenges this field. Herein, we report a versatile 2D MOF-assisted pyrolysis-displacement-alloying route successfully synthesize series binary, ternary even high-entropy NPs that are uniformly dispersed on porous nitrogen-doped carbon nanosheets (PNC NSs). As proof utility, obtained Co0.2 Ru0.7 Pt0.1 /PNC NSs exhibits apparent hydrogen oxidation activity durability with record-high mass specific kinetic current 1.84 A mg-1 at overpotential 50 mV, which is approximately 11.5 times higher than Pt benchmark. Both experimental theoretical studies reveal addition engenders phase transition CoRu alloys from hexagonal close-packed (hcp) face-centered cubic (fcc) structure. The elevated reactivity resulted can be attributed optimized adsorption intermediate decreased reaction barrier for water formation. This study opens new avenue development highly efficient compositions functions.

Язык: Английский

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Space‐Confined Metal Ion Strategy for Carbon Materials Derived from Cobalt Benzimidazole Frameworks with High Desalination Performance in Simulated Seawater

Advanced Materials, Год журнала: 2023, Номер 35(23)

Опубликована: Март 29, 2023

Various metal ions with different valence states (Mg2+ , Al3+ Ca2+ Ti4+ Mn2+ Fe3+ Ni2+ Zn2+ Pb2+ Ba2+ Ce4+ ) are successfully confined in quasi-microcube shaped cobalt benzimidazole frameworks using a space-confined synthesis strategy. More importantly, series of derived carbon materials that confine obtained by high-temperature pyrolysis. Interestingly, the exhibited electric double-layer and pseudocapacitance properties because presence various states. Moreover, additional within may create new phases, which can accelerate Na+ insertion/extraction thus increase electrochemical adsorption. Density functional theory results showed Ti exhibit enhanced resulting from characteristic anatase crystalline phases TiO2 . The Ti-containing have an impressive desalination capacity (62.8 mg g-1 capacitive deionization (CDI) applications high cycling stability. This work provides facile synthetic strategy for confinement metal-organic supports further development seawater CDI.

Язык: Английский

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Polyoxometalate‐Cyclodextrin‐Based Cluster‐Organic Supramolecular Framework for Polysulfide Conversion and Guest–Host Recognition in Lithium‐sulfur Batteries

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(36)

Опубликована: Июль 19, 2023

Developing polyoxometalate-cyclodextrin cluster-organic supramolecular framework (POM-CD-COSF) still remains challenging due to an extremely difficult task in rationally interconnecting two dissimilar building blocks. Here we report unprecedented POM-CD-COSF crystalline structure produced through the self-assembly process of a Krebs-type POM, [Zn2 (WO2 )2 (SbW9 O33 ]10- , and β-CD units. The as-prepared POM-CD-COSF-based battery separator can be applied as lightweight barrier (approximately 0.3 mg cm-2 ) mitigate polysulfide shuttle effect lithium-sulfur batteries. designed Li-S batteries equipped with modified exhibit remarkable electrochemical performance, attributed fast Li+ diffusion channel β-CD, efficient polysulfide-capture ability by dynamic host-guest interaction improved sulfur redox kinetics bidirectional catalysis POM cluster. This research provides broad perspective for development multifunctional frameworks their applications

Язык: Английский

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Structure–property–performance relationship of vanadium- and manganese-based metal–organic frameworks and their derivatives for energy storage and conversion applications

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(19), С. 11149 - 11175

Опубликована: Янв. 1, 2024

The current review discusses on vanadium- and manganese-based metal–organic frameworks their derivatives for energy storage conversion applications along with the potential future advancements in these fields.

Язык: Английский

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