Interface Engineering of Fe7S8/FeS2 Heterostructure in situ Encapsulated into Nitrogen-Doped Carbon Nanotubes for High Power Sodium-Ion Batteries

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Апрель 30, 2023

Heterostructure engineering combined with carbonaceous materials shows great promise toward promoting sluggish kinetics, improving electronic conductivity, and mitigating the huge expansion of transition metal sulfide electrodes for high-performance sodium storage. Herein, iron sulfide-based heterostructures in situ hybridized nitrogen-doped carbon nanotubes (Fe7S8/FeS2/NCNT) have been prepared through a successive pyrolysis sulfidation approach. The Fe7S8/FeS2/NCNT heterostructure delivered high reversible capacity 403.2 mAh g-1 up to 100 cycles at 1.0 A superior rate capability (273.4 20.0 g-1) ester-based electrolyte. Meanwhile, also demonstrated long-term cycling stability (466.7 after 1,000 5.0 outstanding (536.5 ether-based This performance could be mainly attributed fast sodium-ion diffusion capacitive contribution, convenient interfacial dynamics

Язык: Английский

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Hierarchical wormlike engineering: Self-assembled SnS2 nanoflake arrays decorated on hexagonal FeS2@C nano-spindles enables stable and fast sodium storage

Chemical Engineering Journal, Год журнала: 2023, Номер 459, С. 141629 - 141629

Опубликована: Янв. 31, 2023

Язык: Английский

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Homologous Heterostructured NiS/NiS₂@C Hollow Ultrathin Microspheres with Interfacial Electron Redistribution for High‐Performance Sodium Storage

Small, Год журнала: 2023, Номер 19(42)

Опубликована: Июнь 15, 2023

Nickel sulfides with high theoretical capacity are considered as promising anode materials for sodium-ion batteries (SIBs); however, their intrinsic poor electric conductivity, large volume change during charging/discharging, and easy sulfur dissolution result in inferior electrochemical performance sodium storage. Herein, a hierarchical hollow microsphere is assembled from heterostructured NiS/NiS2 nanoparticles confined by situ carbon layer (H-NiS/NiS2 @C) via regulating the sulfidation temperature of precursor Ni-MOFs. The morphology ultrathin spherical shells confinement to active provide rich channels ion/electron transfer alleviate effects agglomeration material. Consequently, as-prepared H-NiS/NiS2 @C exhibit superb properties, satisfactory initial specific 953.0 mA h g-1 at 0.1 A , excellent rate capability 509.9 2 superior longtime cycling life 433.4 after 4500 cycles 10 . Density functional theory calculation shows that heterogenous interfaces electron redistribution lead charge NiS NiS2 thus favor interfacial transport reduce ion-diffusion barrier. This work provides an innovative idea synthesis homologous heterostructures high-efficiency SIB electrode materials.

Язык: Английский

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Heterojunction Vacancies‐Promoted High Sodium Storage Capacity and Fast Reaction Kinetics of the Anodes for Ultra‐High Performance Sodium‐Ion Batteries

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 6, 2024

Abstract Transition metal sulfides as anode materials for sodium‐ion batteries (SIBs) have the advantage of high capacity. However, their cycle‐life and rate performance at ultra‐high current density is still a thorny issue that limit applicability these materials. In this paper, carbon‐embedded heterojunction with sulfur‐vacancies regulated by ultrafine bimetallic (vacancy‐CoS 2 /FeS @C) robust interfacial C‐S‐Co/Fe chemical bonds successfully synthesized explored an material battery. By changing ratio two cations, concentration anion sulfur vacancies can be in‐situ adjusted without additional post‐treatment. The as‐prepared vacancy‐CoS @C offers ultrahigh (285.1 mAh g −1 200 A ), excellent long‐cycle stability (389.2 40 after 10000 cycles), outperforming all reported transition sulfides‐based SIBs. Both ex‐situ characterizations provide strong evidence evolution mechanism phases stable solid‐electrolyte interface (SEI) on surface. functional theory calculations show constructing reasonable significantly increase electronic conductivity. Notably, assembled @C//Na 3 V (PO 4 ) /C full‐cell shows capacity 226.2 400 cycles 2.0 , confirming material's practicability.

Язык: Английский

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Metal Selenides Find Plenty of Space in Architecting Advanced Sodium/Potassium Ion Batteries

Small, Год журнала: 2023, Номер 20(4)

Опубликована: Сен. 15, 2023

Abstract The rapid evolution of smart grid system urges researchers on exploiting systems with properties high‐energy, low‐cost, and eco‐friendly beyond lithium‐ion batteries. Under the circumstances, sodium‐ potassium‐ion batteries semblable work mechanism to commercial batteries, hold merits cost‐effective earth‐abundant. As a result, it is deemed promising candidate for large‐scale energy storage devices. Exploiting appropriate active electrode materials in center spotlight development Metal selenides special structures relatively high theoretical capacity have aroused broad interest achieved great achievements. To push smooth metal enhancement electrochemical performance vital grasp inherent mechanisms these materials. Herein, state‐of‐the‐art challenges are summarized discussed. Meanwhile, corresponding future directions also highlighted.

Язык: Английский

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Bimetallic selenide heterostructure with directional built-in electric-field confined in N-doped carbon nanofibers for superior sodium storage with ultralong lifespan

Journal of Energy Chemistry, Год журнала: 2024, Номер 91, С. 407 - 416

Опубликована: Янв. 11, 2024

Язык: Английский

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Towards metal selenides: a promising anode for sodium-ion batteries

Chemical Communications, Год журнала: 2024, Номер 60(54), С. 6860 - 6872

Опубликована: Янв. 1, 2024

An overview of our endeavors to address the challenges associated with metal selenide-based anode materials achieve high performance for sodium-ion batteries.

Язык: Английский

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Fe-Doped Ni/Co-Based Selenide Hierarchical Nanosheet Arrays as Self-Supporting Bifunctional Electrocatalysts for Overall Water Splitting

ACS Applied Nano Materials, Год журнала: 2024, Номер 7(10), С. 11530 - 11540

Опубликована: Май 11, 2024

It is necessary to optimize the electrocatalytic activity of an electrocatalyst by means morphology and composition regulation. Herein, Fe-doped bimetallic selenide hierarchical nanosheet arrays grown on nickel foam (Fe-NiCoSe/NiCoSe/NF) are obtained for overall water splitting. The Fe-NiCoSe/NiCoSe/NF fabricated selenizing NiCoFe Prussian blue analogue (NiCoFe-PBA) growing a NiCo-layered double hydroxide (NiCo-LDH). Benefiting from arrays, synergistic effect selenides, as well electronic structure rearrangement caused Fe-doping, catalyst exhibits low overpotentials 120 mV hydrogen evolution reaction (HER) 199 oxygen (OER) at 10 mA·cm–2 in 1.0 M KOH. In addition, when used bifunctional splitting, requires cell voltage 1.93 V (1.82 V) reach 100 (50 mA·cm–2). Additionally, prolonged durability lasting 150 h mA·cm–2. This work provides reasonable idea designing nanostructured toward splitting regulating composition.

Язык: Английский

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Prussian blue analogue derived porous hollow nanocages comprising polydopamine-derived N-doped C coated CoSe2/FeSe2 nanoparticles composited with N-doped graphitic C as an anode for high-rate Na-ion batteries

Chemical Engineering Journal, Год журнала: 2024, Номер 495, С. 153353 - 153353

Опубликована: Июнь 22, 2024

Язык: Английский

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CoSe2-Modified multidimensional porous carbon frameworks as high-Performance anode for fast-Charging sodium-Ion batteries

Chemical Engineering Journal, Год журнала: 2024, Номер 497, С. 154875 - 154875

Опубликована: Авг. 15, 2024

Язык: Английский

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