Tunable Interfacial Electric Field‐Mediated Cobalt‐Doped FeSe/Fe₃Se₄ Heterostructure for High‐Efficiency Potassium Storage

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(28)

Published: April 25, 2024

Abstract The interfacial electric field (IEF) in the heterostructure can accelerate electron transport and ion migration, thereby enhancing electrochemical performance of potassium‐ion batteries (PIBs). Nevertheless, quantification modulation IEF for high‐efficiency PIB anodes currently remains a blank slate. Herein, we achieve first time tuning via amorphous carbon‐coated undifferentiated cobalt‐doped FeSe/Fe 3 Se 4 (denoted UN‐CoFe 5 /C) efficient potassium storage. Co doping increase , improving transport, promoting adsorption capacity, lowering diffusion barrier. As expected, magnitude /C is experimentally quantified as 62.84 mV, which 3.65 times larger than that (Fe /C). Benefiting from strong IEF, anode exhibits superior rate capability (145.8 mAh g −1 at 10.0 A ) long cycle lifespan (capacity retention 95.1 % over 3000 cycles 1.0 ). Furthermore, this strategy universally regulate CoSe 2 /Co 9 8 FeS /Fe 7 S heterostructures. This work provide fundamental insights into design advanced electrodes.

Language: Английский

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Tunable Interfacial Electric Field‐Mediated Cobalt‐Doped FeSe/Fe3Se4 Heterostructure for High‐Efficiency Potassium Storage

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(28)

Published: April 25, 2024

Abstract The interfacial electric field (IEF) in the heterostructure can accelerate electron transport and ion migration, thereby enhancing electrochemical performance of potassium‐ion batteries (PIBs). Nevertheless, quantification modulation IEF for high‐efficiency PIB anodes currently remains a blank slate. Herein, we achieve first time tuning via amorphous carbon‐coated undifferentiated cobalt‐doped FeSe/Fe 3 Se 4 (denoted UN‐CoFe 5 /C) efficient potassium storage. Co doping increase , improving transport, promoting adsorption capacity, lowering diffusion barrier. As expected, magnitude /C is experimentally quantified as 62.84 mV, which 3.65 times larger than that (Fe /C). Benefiting from strong IEF, anode exhibits superior rate capability (145.8 mAh g −1 at 10.0 A ) long cycle lifespan (capacity retention 95.1 % over 3000 cycles 1.0 ). Furthermore, this strategy universally regulate CoSe 2 /Co 9 8 FeS /Fe 7 S heterostructures. This work provide fundamental insights into design advanced electrodes.

Language: Английский

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Carbon Superstructure‐Supported Half‐Metallic V₂O₃ Nanospheres for High‐Efficiency Photorechargeable Zinc Ion Batteries

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(38)

Published: June 26, 2024

Photorechargeable zinc ion batteries (PZIBs), which can directly harvest and store solar energy, are promising technologies for the development of a renewable energy society. However, incompatibility requirement between narrow band gap wide coverage has raised severe challenges high-efficiency dual-functional photocathodes. Herein, half-metallic vanadium (III) oxide (V

Language: Английский

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A flexible and potassiphilic porous interconnected mediator for dendrite-free and stable potassium metal anodes

Energy storage materials, Journal Year: 2024, Volume and Issue: 71, P. 103643 - 103643

Published: July 15, 2024

Language: Английский

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Bi2O3/Bi@CSs achieved by shock-type heating for fast and long-lasting sodium ion battery

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 498, P. 155545 - 155545

Published: Sept. 7, 2024

Language: Английский

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Synchronous Regulation of S-Deficient ZnS-MoS₂ Heterostructure Nanoreactor for Fast and Durable Sodium Storage

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: April 25, 2025

The enhancement of charge transfer and the relief volume stress anode materials contribute to fully exploiting electrochemical performance for sodium ion storage. Herein, a hollow carbon polyhedra nanoreactor adhered with ZnS-MoS2 heterostructure tunable sulfur vacancy content (denoted as hp-ZMS-600/700/800) is prepared by self-assembly temperature dependent sulfurization procedure. intimate heterointerface moderate vacancies provide fast ion/electron channels, nanoreactors afford large variation maintain structural integrity during sodiation/desodiation process. Theoretical calculations in situ/ex situ characterization techniques reveal both excellent electron/ion diffusion dynamics storage mechanism. As result, optimized hp-ZMS-700 sodium-ion batteries delivers high initial Coulombic efficiency 96.3%, capacity 398 mAh g-1 at 0.1 A g-1, good rate capability 119.8 5 an retention 84.6% after 1000 cycles 2 g-1.

Language: Английский

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Carbon Superstructure‐Supported Half‐Metallic V₂O₃ Nanospheres for High‐Efficiency Photorechargeable Zinc Ion Batteries

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(38)

Published: June 26, 2024

Abstract Photorechargeable zinc ion batteries (PZIBs), which can directly harvest and store solar energy, are promising technologies for the development of a renewable energy society. However, incompatibility requirement between narrow band gap wide coverage has raised severe challenges high‐efficiency dual‐functional photocathodes. Herein, half‐metallic vanadium (III) oxide (V 2 O 3 ) was first reported as photocathode PZIBs. Theoretical experimental results revealed its unique photoelectrical storage properties capturing storing energy. To this end, synergistic protective etching strategy developed to construct carbon superstructure‐supported V nanospheres @CSs). The characteristics , combined with three‐dimensional superstructure assembled by ultrathin nanosheets, established rapid charge transfer networks robust framework efficient stable solar‐energy storage. Consequently, @CSs delivered record properties, including photo‐assisted discharge capacities 463 mA ⋅ h g −1 at 2.0 A long‐term cycling stability over 3000 cycles. Notably, PZIBs using photocathodes could be photorecharged without an external circuit, exhibiting high photo conversion efficiency (0.354 %) photorecharge voltage (1.0 V). This study offered direction direct capture

Language: Английский

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Vanadium Molybdenum Disulfide Nanosheets Anchoring on Carbon Cloth as High‐Energy Density Cathode for Magnesium–Lithium Hybrid Batteries

Small, Journal Year: 2024, Volume and Issue: 20(48)

Published: Aug. 27, 2024

Abstract Magnesium–lithium‐ion hybrid batteries (MLIBs) have gained significant attention since the combination of a dendrite‐free and low‐cost magnesium anode with lithium‐ion storage cathodes. However, lack high‐performance cathodes has severely hindered their development, limited by lower operating voltages electrolytes. Herein, vanadium molybdenum disulfide nanosheets anchoring on flexible carbon cloth (VMS@CC) are constructed as for MLIBs, which inherit electrochemical properties high‐voltage VS 2 high‐capacity MoS , simultaneously. By adjusting V Mo atomic ratio, VMS@CC cathode MLIBs delivers record maximum energy density 275.5 Wh kg −1 high working voltage 1.07 at 50 mA g . Meanwhile, under synergistic effects conductive matrix, abundant hetero‐interfaces defects, well expanded interlayer spacing, displays superior rate capability long‐term cycling stability. Ex situ analyses demonstrate VMS exhibits Li + /Mg 2+ co‐insertion/extraction mechanism in following insertion organic species electrolyte during aging process. The fabricated herein provides new insight into construction high‐energy MLIBs.

Language: Английский

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Enhanced Interfacial Polarization Loss of FeS/MoS₂@N‐Doped Carbon Sandwich‐Walled Nanotubes Enables High‐Performance Electromagnetic Wave Absorption

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 3, 2025

Abstract Multiple interfaces and hollow structures are vital to high‐performance electromagnetic wave (EMW) absorption of absorbers. However, it remains difficult construct tune such structures, there is limited understanding regarding the relationships between their structural dielectric loss properties. Herein, theoretical simulations for EMW performance sandwich solid double‐layer first carried out found that former exhibits a more pronounced power density than latter. Then, ligand‐exchange strategy following vulcanization process fabricate FeS/MoS 2 @N‐doped carbon sandwich‐walled nanotubes (FeMoS‐SWCNTs) dveloped. The experimental results demonstrate FeMoS‐SWCNTs show significantly enhanced compared FeS counterparts, consistent with simulation results. Further functional theory calculations reveal properties attributed stronger interfacial polarization resulting from electronic interactions at multiple (FeS/N‐doped (NC), MoS /NC, ), conduction caused by higher states in heterostructure. These findings elucidate relationship nanotube properties, developed method offers feasible approach rational design applications.

Language: Английский

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Construction of three-dimensional hierarchical nest-like NiS2 with efficient stress dissipation for superior sodium storage

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 689, P. 137220 - 137220

Published: March 3, 2025

Language: Английский

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