Hierarchical porous one-dimensional N-doped C framework comprising ultrafine Mo2C catalysts for stable Na/K–Se batteries: Experimental and theoretical investigations

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162456 - 162456

Published: April 1, 2025

Language: Английский

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Polysulfide barrier comprising bismuth selenide nanocrystals well anchored within N-doped carbon microspheres for stable Li-S batteries

Energy Materials, Journal Year: 2025, Volume and Issue: 5(8)

Published: April 22, 2025

The development of functional interlayers to effectively anchor lithium polysulfide and enhance the integrity sulfur cathodes in lithium-sulfur (Li-S) batteries has received significant global consideration. However, identifying an interlayer that is both highly conductive structurally robust remains a major challenge. This study presents synthesis three-dimensional nitrogen-doped carbon microspheres embedded with bismuth selenide nanocrystals (referred as “three-dimensional (3D) Bi2Se3@N-C” microspheres) evaluates their role barrier for enhanced Li-S battery performance. Bi2Se3 within provide numerous active spots chemical captivity electrocatalytic transformation species. Moreover, N-doped framework facilitates speedy transfer charge moieties, resulting faster redox activity. Correspondingly, cells paired 3D Bi2Se3@N-C microsphere modified separators exhibit excellent rate capability (297 mA h g-1 at 2.0 C-rate) prolonged stable cycling performance different C-rates (863 after 100 cycles 0.1 C, 440 200 0.5 219 500 C). cell demonstrates satisfactory retaining 57% its capacity when material loading was raised 3.5 mg cm-2, confirming practical feasibility prepared nanostructure. detailed physical electrochemical results presented this offer valuable perceptions expansion superior, conductive, easily scalable nanostructures various energy storage demands.

Language: Английский

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Three-Dimensional Reticulated Fe–Co Sulfide/Graphene/CNTs Composites as Functional Interlayer Capturing and Converting Polysulfide for High-Performance Lithium–Sulfur Batteries

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(10), P. 9080 - 9090

Published: April 30, 2024

Lithium–sulfur batteries are considered the next generation of energy storage devices, boasting high theoretical capacity, low cost, and environmental friendliness. However, weak conductivity sulfur shuttle effect lithium polysulfides (LiPSs) major challenges hindering lithium–sulfur battery development. Herein, a functional interlayer composite Fe–Co sulfide/graphene/CNTs (FCS@GC) was prepared. The composite, which benefits from 3D cross-linked network formed by CNTs graphene, could avoid agglomeration carbon material enhance physical adsorption capacity LiPSs, effectively improving transfer Li+/e–. Additionally, loaded FeCoS4 provides with efficient chemical conversion inhibits at multiple levels, greatly improves kinetics. battery, FCS@GC as its interlayer, exhibits stable specific 787.5 mA h g–1 after 200 charge/discharge cycles 0.5 C. Furthermore, it showcases an initial cycling 885.5 1 In addition, decay rate per cycle is only 0.036% 800 cycles. After 110 loading 5 mg cm–2, can still maintain 750.5 g–1. structure this innovative compound will offer viable solutions for issue commercializing batteries.

Language: Английский

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Enhanced Physico‐Chemical Polysulfide Curtailment Using Carbon Nanotube‐Binary Metal Sulfide Nanocomposite for High‐Performance Lithium‐Sulfur Batteries

Energy Technology, Journal Year: 2024, Volume and Issue: 12(7)

Published: May 14, 2024

The electrochemical output of lithium‐sulfur batteries is highly restricted by the dissolution and shuttling polysulfide intermediates, which leads to shuttle effect. binary metal sulfides offer a greater number active sites better interaction compared unitary sulfides. Herein, nickel cobalt sulfide‐carbon nanotube nanocomposite devised as efficient separator coater for high‐energy Li‐S batteries. featured with superior confinement ability due its dual improved ionic electronic conductivity. material also possesses enhanced electrolyte wettability, interfacial properties, frequent uptake. By virtue above‐mentioned superiorities, cell reveals an initial discharge capacity 1152 mAh g −1 at 0.5 C rate maintains retained 82% after 500 cycles. shows significant results magnificent delivery 714 2 constant open‐circuit potential 100 h.

Language: Английский

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Anchoring polysulfides with ternary Fe3O4/graphitic carbon/porous carbon fiber hierarchical structures for high-rate lithium–sulfur batteries

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 105, P. 114591 - 114591

Published: Nov. 20, 2024

Language: Английский

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Pitch-derived C coated three-dimensional CNTs/reduced graphene oxide microsphere encapsulating Si nanoparticles as anodes for lithium-ion batteries

Electrochimica Acta, Journal Year: 2024, Volume and Issue: unknown, P. 145440 - 145440

Published: Nov. 1, 2024

Language: Английский

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