In Situ Universal Construction of Thiophosphite/MXene Hybrids via Lewis Acidic Etching for Superior Sodium Storage

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(46)

Published: June 18, 2024

Abstract Metal thiophosphite has demonstrated promising application potential as an anode material for sodium‐ion batteries. Nevertheless, the intrinsic low electrical conductivity and drastic volume expansion impede its commercialization. Herein, a series of metal thiophosphite/Ti 3 C 2 T x (metal = Fe, Ni, Co, Cd) composites are constructed via Lewis acidic molten salt etching followed by synchronous phospho‐sulfurization. The Ti substrate endows hybrids with high conductivity. Importantly, grown on MXene layers exhibits 3D cross‐linked structure, which not only facilitates electron/ion transport, but also maintains robust structural stability owing to space confinement effect. As proof concept, FePS /Ti demonstrates remarkable rate performance (827.4 598.1 mAh g −1 at 0.1 10 A , respectively) along long‐term cycling (capacity retention 93.7% after 2000 cycles 5 ). Impressively, //NVPO full cell reversible capacity 396.8 over 1350 . sodium storage mechanism is further unveiled through in situ XRD/ex HRTEM characterizations theoretical calculations. This work provides fresh perspective enhancing electrochemical construction hybrids.

Language: Английский

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Restraining the shuttle effect of polyiodides and modulating the deposition of zinc ions to enhance the cycle lifespan of aqueous Zn–I₂ batteries

Chemical Science, Journal Year: 2024, Volume and Issue: 15(15), P. 5711 - 5722

Published: Jan. 1, 2024

Adding PVA to the Zn–I 2 battery's electrolyte improves its performance by efficiently confining shuttle effect of polyiodides and modulating deposition zinc ions.

Language: Английский

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A surface-induced assembly strategy to fabricate flexible carbon nanofiber/coal-based carbon dots films as free-standing anodes for high-performance sodium-ion batteries

Applied Surface Science, Journal Year: 2024, Volume and Issue: 660, P. 159999 - 159999

Published: March 28, 2024

Language: Английский

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Double additive electrolyte solvation engineering to achieve long cycle and high capacity sodium-ion battery

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 489, P. 151525 - 151525

Published: April 22, 2024

Language: Английский

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Heterostructured MnSe/FeSe nanorods encapsulated by carbon with enhanced Na+ diffusion as anode materials for sodium-ion batteries

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 672, P. 43 - 52

Published: May 31, 2024

Language: Английский

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Unraveling the Ionic Storage Mechanism of Flexible Nitrogen‐Doped MXene Films for High‐Performance Aqueous Hybrid Supercapacitors

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 8, 2024

Abstract 2D MXene nanomaterials have excellent potential for application in novel electrochemical energy storage technologies such as supercapacitors and batteries, but the existing pure is difficult to meet practical needs. Although properties of modified been improved, unclear ion mechanism still hinders development MXene‐based electrode materials. Herein, study develops flexible self‐supported nitrogen‐doped Ti 3 C 2 (Py‐Ti ) films by highly mobile, high nitrogen content, oxygen‐free pyridine‐assisted solvothermal method, then deeply investigates hybrid four aqueous electrolytes (H SO 4 , Li Na MgSO ). The experimental results suggest that Py‐Ti film exhibits a pseudocapacitance‐dominated mechanism. Particularly, specific capacity 1 M H (506 F g −1 at 0.1 A 4–5 times higher than other (≈110 ), which could be attributed substantially ionic diffusion coefficient + those Mg 2+ with small size, conductivity, fast pseudocapacitance response. Theoretical analysis further confirms has strengthened conductivity electrical double‐layer capacitance performance. Meanwhile, it lower free protonation deprotonation functional groups, gives

Language: Английский

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S, Se-Codoped Dual Carbon Coating and Se Substitution in Co-Alkoxide-Derived CoS2 Through SeS2 Triggered Selenization for High-Performance Sodium-Ion Batteries

Batteries, Journal Year: 2025, Volume and Issue: 11(1), P. 28 - 28

Published: Jan. 15, 2025

The development of metal sulfides as anodes for sodium-ion batteries (SIBs) is significantly obstructed by the slow kinetics electrochemical reactions and substantial volume changes on cycling. Herein, we introduce a selenium-substituted cobalt disulfide embedded within dual carbon–graphene framework (Se-CoS2/C@rGO) high-performance SIBs. Se-CoS2/C@rGO was prepared via synchronous sulfurization/selenization strategy using Co-alkoxide precursor SeS2 source selenium sulfur, during which EG anions are converted in situ to S, Se codoped carbon scaffold. matrix not only improves electronic conductivity but also stabilizes electrode material effectively. In addition, substitution CoS2 lattice further electrical promotes Na+ reaction kinetics. enhanced intrinsic electronic/ionic reinforced structural stability endow anode with high reversible capacity (558.2 mAh g−1 at 0.2 A g−1), superior rate performance (351 20 long cycle life (93.5% retention after 2100 cycles 1 g−1). This work provides new insights into stable materials through encapsulation.

Language: Английский

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Anode materials for potassium/lithium-ion batteries based on metal-organic skeleton method: Design of CoSe2/MoSe2 composite carbon nanotube network heterostructures

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 641, P. 236858 - 236858

Published: March 23, 2025

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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Boosting Zn metal anode stability with a dimethylformamide additive

Journal of Alloys and Compounds, Journal Year: 2023, Volume and Issue: 972, P. 172773 - 172773

Published: Nov. 5, 2023

Language: Английский

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