Flexible Silicon/Titanium Dioxide/Reduced Graphene Oxide Self-Standing Electrode with High Performance and High Stability for Lithium-Ion Batteries

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(3), P. 1422 - 1431

Published: Jan. 9, 2024

The great volume expansion and unstable nature of the solid electrolyte interface film silicon (Si) are central issues that obstruct advancement Si-based electrode despite its high theoretical capacity abundant resources. Here a kind flexible silicon/titanium dioxide/reduced graphene oxide (Si/TiO2/rGO) self-standing is constructed without assistance binder conductive agent. Briefly, Si nanoparticle coated with TiO2 via sol–gel process, then core–shell structured Si/TiO2 assembled GO using chitosan as cross-linker followed by freeze-drying, pressing, annealing at an ammonia/argon (NH3/Ar) atmosphere. In this structure, rGO provide dual protection for Si, continuous path formed. Additionally, nitrogen doping NH3 further strengthens lithium storage performance. fabricated Si/TiO2/rGO demonstrates excellent rate performance over broad range current densities keeps reversible 1333.8 mAh g–1 after 200 cycles operated mA g–1.

Language: Английский

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Rationally incorporated SnO2/SnS2 nanoparticles on sulfur-doped graphene aerogels for high-performance lithium/sodium-ion batteries

Journal of Energy Storage, Journal Year: 2023, Volume and Issue: 65, P. 107344 - 107344

Published: April 20, 2023

Language: Английский

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Constructing a boron-doped graphite anode with an accelerated Li+ diffusion dynamics for practical high-rate Li-ion batteries

Electrochimica Acta, Journal Year: 2023, Volume and Issue: 463, P. 142821 - 142821

Published: July 3, 2023

Language: Английский

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Embedding silicon nanoparticle in porous carbon fiber for highly stable lithium-ion battery anode

Materials Letters, Journal Year: 2024, Volume and Issue: 361, P. 136015 - 136015

Published: Feb. 1, 2024

Language: Английский

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Enhancing the Lithium Storage Performance of the Nb₂O₅ Anode via Synergistic Engineering of Phase and Cu Doping

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(17), P. 22055 - 22065

Published: April 18, 2024

Nb2O5 has been viewed as a promising anode material for lithium-ion batteries by virtue of its appropriate redox potential and high theoretical capacity. However, it suffers from poor electric conductivity low ion diffusivity. Herein, we demonstrate the controllable fabrication Cu-doped with orthorhombic (T-Nb2O5) monoclinic (H-Nb2O5) phases through annealing solvothermally presynthesized precursor under different temperatures in air, Cu doping amount can be readily controlled concentration solution, whose effect on lithium storage behaviors is thoroughly investigated. H-Nb2O5 shows obvious peaks (Nb5+/Nb4+ Nb4+/Nb3+) much higher capacity better cycling stability than those widely investigated T-Nb2O5. When introducing doping, optimized H-Cu0.1-Nb2O5 electrode greatly enhanced lower diffusion barrier revealed calculations electrochemical characterizations, delivering reversible 203.6 mAh g-1 retention 140.8 after 5000 cycles at 1 A g-1, initial Coulombic efficiency 91% rate 144.2 4 g-1. As demonstration full-cell application, H-Cu0.1-Nb2O5||LiFePO4 cell displays good performance, exhibiting 135 200 0.2 More importantly, this work offers new synthesis protocol phase improved reaction kinetics.

Language: Английский

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In-Situ Alloy-Modified Sodiophilic Current Collectors for Anode-Less Sodium Metal Batteries

Batteries, Journal Year: 2023, Volume and Issue: 9(8), P. 408 - 408

Published: Aug. 4, 2023

Anode-less sodium metal batteries have drawn dramatica attention owing to their high specific energy and low cost. However, the growth of dendrites resulting loss active materials serious safety concerns hinder practical applications. In this work, a bismuth-based modification layer with good sodiophilicity is constructed on surface Cu foil (denoted as Cu@Bi) control deposition Na metal. The activation-derived porous Na-rich alloy phase can provide abundant nucleation sites reduce overpotential induce uniform dense When evaluated in half cell, Cu@Bi current collectors operate for 750 h at 1 mA cm−2 mAh cm−2, an average coulombic efficiency (CE) 99.5%. density improved 2 also stably maintain cycles, demonstrating remarkable effect layer. coupled Na3V2(PO4)3 cathode, full cell exhibits stable cycle performance over 80 cycles. strategy fresh ideas research application anode-less even anode-free batteries.

Language: Английский

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Two-dimensional layered In2P3S9: A novel superior anode material for sodium-ion batteries

Journal of Energy Chemistry, Journal Year: 2023, Volume and Issue: 90, P. 294 - 304

Published: Nov. 14, 2023

Language: Английский

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Unraveling the atomic-level manipulation mechanism of tin-based ternary anodes via hetero-anion engineering for stable sodium ion storage

Composites Part B Engineering, Journal Year: 2023, Volume and Issue: 269, P. 111109 - 111109

Published: Nov. 23, 2023

Language: Английский

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Ultrafast and Durable Sodium‐Ion Storage of Pseudocapacitive VN@C Hybrid Nanorods from Metal–Organic Framework

Small, Journal Year: 2024, Volume and Issue: 20(28)

Published: Jan. 31, 2024

Abstract Vanadium nitride (VN) is a promising electrode material for sodium‐ion storage due to its multivalent states and high electrical conductivity. However, electrochemical performance has not been fully explored the mechanism remains be clarified up date. Here, possibility of VN/carbon hybrid nanorods synthesized from metal–organic framework ultrafast durable demonstrated. The delivers specific capacity (352 mA h g −1 ), fast‐charging capability (within 47.5 s), ultralong cycling stability (10 000 cycles) storage. In situ XRD characterization density functional theory (DFT) calculations reveal that surface‐redox reactions at vanadium sites are dominant mechanism. An energy‐power balanced capacitor device verified by assembling anode active carbon cathode, it shows maximum energy 103 Wh kg power 113 W .

Language: Английский

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Ultrastable Cycle Stability of SnO₂ Quantum Dot Embedded Polypyrrole Anode for Li-Ion Battery

ACS Applied Electronic Materials, Journal Year: 2024, Volume and Issue: 6(5), P. 3454 - 3463

Published: May 16, 2024

SnO2 is an excellent candidate for replacement of conventional graphite-based anodes in lithium-ion batteries. It offers four times the specific capacity carbon and a low working potential ∼0.6 V vs Li+/Li but suffers from large fade due to drastic volume change (∼300%) upon cycling. A unique design quantum dots (QDs) dispersed over flexible conducting polypyrrole (PPy) vital achieving high rate capability long cycle life. This specially designed QDs@PPy anode delivers performance with discharge capacities 1252, 723, 474, 298, 152 mAh g–1 at rates 0.35, 0.7, 1, 1.8, 3.5 g–1. Upon cycling elevated current density 2 g–1, demonstrated initial 572 while retaining 399 1360th very decay 0.022% per cycle. The superior mechanical stability conductivity composite may be reason behind stability.

Language: Английский

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