High-Entropy MXene as Bifunctional Mediator toward Advanced Li–S Full Batteries

ACS Nano, Journal Year: 2024, Volume and Issue: 18(3), P. 2395 - 2408

Published: Jan. 9, 2024

The development of high-energy-density Li–S batteries (LSBs) is still hindered by the disturbing polysulfide shuttle effect. Herein, with clever combination between "high entropy" and MXene, an HE-MXene doped graphene composite containing multiple element quasi-atoms as bifunctional mediator for separator modification (HE-MXene/G@PP) in LSBs proposed. HE-MXene/G@PP offers high electrical conductivity fast lithium (LiPS) redox conversion kinetics, abundant metal active sites efficient chemisorption LiPSs, strong lipophilic characteristics uniform Li+ deposition on surface. As demonstrated DFT theoretical calculations, situ Raman, DRT results successively, efficiently captures LiPSs through synergistic modulation cocktail effect accelerates reaction, lattice distortion effectively induces homogeneous dendritic-free lithium. Therefore, this work achieves excellent long-term cycling performance a decay rate 0.026%/0.031% per cycle after 1200 cycles at 1 C/2 C. Li||Li symmetric cell maintains stable overpotential 6000 h under 40 mA cm–2/40 mAh cm–2. Furthermore, it delivers favorable stability 7.8 mg cm–2 low E/S ratio 5.6 μL mg–1. This strategy provides rational approach to resolve sulfur cathode anode problems simultaneously.

Language: Английский

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Advances in Aqueous Zinc Ion Batteries based on Conversion Mechanism: Challenges, Strategies, and Prospects

Small, Journal Year: 2024, Volume and Issue: 20(27)

Published: Jan. 28, 2024

Abstract Recently, aqueous zinc‐ion batteries with conversion mechanisms have received wide attention in energy storage systems on account of excellent specific capacity, high power density, and density. Unfortunately, some characteristics cathode material, zinc anode, electrolyte still limit the development possessing mechanism. Consequently, this paper provides a detailed summary for numerous zinc‐based batteries: zinc‐sulfur (Zn‐S) batteries, zinc‐selenium (Zn‐Se) zinc‐tellurium (Zn‐Te) zinc‐iodine (Zn‐I 2 ) zinc‐bromine (Zn‐Br batteries. Meanwhile, reaction mechanism research progress investigation composite cathode, anode materials, selection electrolytes are systematically introduced. Finally, review comprehensively describes prospects outlook mechanism, aiming to promote rapid

Language: Английский

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Enhanced Electron Delocalization within Coherent Nano‐Heterocrystal Ensembles for Optimizing Polysulfide Conversion in High‐Energy‐Density Li‐S Batteries

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(13)

Published: Dec. 25, 2023

Abstract Commercialization of high energy density Lithium‐Sulfur (Li‐S) batteries is impeded by challenges such as polysulfide shuttling, sluggish reaction kinetics, and limited Li + transport. Herein, a jigsaw‐inspired catalyst design strategy that involves in situ assembly coherent nano‐heterocrystal ensembles (CNEs) to stabilize high‐activity crystal facets, enhance electron delocalization, reduce associated barriers proposed. On the surface, stabilized facets induce aggregation. Simultaneously, surrounded surface with enhanced activity promote 2 S deposition diffusion, synergistically facilitating continuous efficient sulfur redox. Experimental DFT computations results reveal dual‐component hetero‐facet alters coordination Nb atoms, enabling redistribution 3D orbital electrons at center promoting d‐p hybridization sulfur. The CNE, based on level gradient lattice matching, endows maximum transfer catalysts establishes smooth pathways for ion diffusion. Encouragingly, NbN‐NbC‐based pouch battery delivers Weight 357 Wh kg −1 , thereby demonstrating practical application value CNEs. This work unveils novel paradigm designing high‐performance catalysts, which has potential shape future research electrocatalysts storage applications.

Language: Английский

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3d‐Orbital High‐Spin Configuration Driven From Electronic Modulation of Fe₃O₄/FeP Heterostructures Empowering Efficient Electrocatalyst for Lithium−Sulfur Batteries

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(49)

Published: Aug. 29, 2024

Abstract The intricate lithium polysulfides (LiPSs) shuttle and uncontrollable dendrite growth critically hinder the commercialization of lithium−sulfur (Li−S) batteries. rational orderly assignment multi‐electron induced flow is critical link in sulfer redox reaction. Herein, yolk‐shell Fe 3 O 4 /FeP@C heterostructure nanoreactors are fabricated to modulate electronic structure, including spin‐related charge behavior orbital orientation control, which can demonstrate interaction between catalytic activity spin‐state conformation. spin splitting induces electron transition from low‐spin high‐spin, where non‐degenerate orbitals contribute energy level up‐shift, guiding migration FeP , activating more states d orbitals. Spin polarization guides sulfur closed‐loop conversion, confirmed by DFT simulations situ Raman. Hence, electrochemical performances remarkable at ultra‐high current density loading. Even an initial specific capacity 928.5 mAh g −1 a Li−S pouch cell reveals practical prospect /FeP@C/PP separator. Li//Li symmetric cycles steadily for 4000 h, confirming interlayer simultaneously promotes evolution kinetics sieves ions. This work deciphers principles spin‐orbit coupling, achieving topological modulation “charge−spin−orbit” toward electrocatalysts.

Language: Английский

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Accelerating catalytic conversion and chemisorption of polysulfides for advanced Li-S batteries from incorporating [email protected] hetero-nanocrystals into boron carbonitride nanotubes

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 678, P. 393 - 406

Published: Aug. 24, 2024

Language: Английский

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Accelerating Sulfur Redox Kinetics by Electronic Modulation and Drifting Effects of Pre‐Lithiation Electrocatalysts

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(8)

Published: Oct. 10, 2023

Abstract Efficient catalyst design is crucial for addressing the sluggish multi‐step sulfur redox reaction (SRR) in lithium‐sulfur batteries (LiSBs), which are among promising candidates next‐generation high‐energy‐density storage systems. However, limited understanding of underlying catalytic kinetic mechanisms and lack precise control over structures pose challenges designing highly efficient catalysts, hinder LiSBs’ practical application. Here, drawing inspiration from theoretical calculations, concept precisely controlled pre‐lithiation SRR electrocatalysts proposed. The dual roles channel surface lithium pre‐lithiated 1T’‐MoS 2 revealed, referred to as “electronic modulation effect” “drifting effect”, respectively, both contribute accelerating kinetics. As a result, thus‐designed 1T’‐Li x MoS /CS cathode obtained by epitaxial growth on cubic Co 9 S 8 exhibits impressive performance with high initial specific capacity 1049.8 mAh g −1 , excellent rate‐capability, remarkable long‐term cycling stability decay rate only 0.019% per cycle 1000 cycles at 3 C. This work highlights importance parameters synergistic effects lithium, providing new valuable insights into optimization high‐performance LiSBs.

Language: Английский

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Intrinsic activity regulation of metal chalcogenide electrocatalysts for lithium–sulfur batteries

Energy storage materials, Journal Year: 2023, Volume and Issue: 60, P. 102855 - 102855

Published: June 1, 2023

Language: Английский

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Cubic FeS2 enabling robust polysulfide adsorption and catalysis in lithium/sulfur batteries

Journal of Energy Storage, Journal Year: 2023, Volume and Issue: 72, P. 108712 - 108712

Published: Aug. 15, 2023

Language: Английский

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Recent progress in MXene-based materials, synthesis, design, and application in lithium-sulfur batteries

Materials Today Chemistry, Journal Year: 2024, Volume and Issue: 40, P. 102200 - 102200

Published: July 21, 2024

Language: Английский

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Recent advancements in supercapacitors and their charge storage mechanism and progress in transition metal sulfide-based electrodes

Physica Scripta, Journal Year: 2024, Volume and Issue: 99(6), P. 062001 - 062001

Published: April 16, 2024

Abstract Efficient energy storage strategies have become a major priority in the last few years. Transition metal sulphides are popularly known as attractive electrode materials or supercapacitors due to their high theoretical capacitance, excellent electrical conductivity, and favourable redox properties. Through compositional structural engineering, some transition like Mn, V, Co, Fe, Cu, Ni, Mo, Zn, W, Sn shown substantial improvements electrochemical performance. Composite engineering morphological control two of key employed improve TMS electrode’s Excellent TMSs address issues slow kinetics, poor stability, large volume expansions. This study reveal optimised potential transform supercapacitor applications provides viable approaches conquer current hurdles shape forthcoming century’s high-performance low-cost technology. The effects composite on ultimate performance primary focus this investigation. Challenges further advancement sulphide-based also explored article. Critical resolving significant our understanding kinetic mechanistic perspectives charge processes, i.e., expansions, highlighted. Ultimately, future potentials, challenges, possible solutions tackle these problems broadly discussed.

Language: Английский

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