Tailoring the ion storage of MXene by aramid nanofibers towards self-standing electrodes for flexible solid-state supercapacitors

Nanotechnology, Год журнала: 2024, Номер 35(36), С. 365403 - 365403

Опубликована: Июнь 12, 2024

Two-dimensional (2D) transition metal carbides and nitrides (MXenes) are a class of 2D nanomaterials that can offer excellent properties for high-performance supercapacitors. Nevertheless, irreversible restacking MXene sheets decreases the interlayer spacing, which inhibits ion intercalation between nanosheets finally deteriorates electrochemical performance Herein, aramid nanofibers (ANFs) mixed with Ti

Язык: Английский

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Flower‐like Hierarchical Ti₃C₂T_x@MoS₂/Nitrogen‐doped Carbon Composite as High‐performance Anodes for Sodium‐ion Batteries

Batteries & Supercaps, Год журнала: 2023, Номер 7(2)

Опубликована: Ноя. 21, 2023

Abstract The lack of high‐performance electrodes is a key factor restricting the development sodium‐ion batteries (SIBs), and usually certain type electrode material alone often fails to combine merits high capacity good conductivity. Herein, nitrogen‐doped carbon (NC) was used as multifunctional bridge uniformly compound high‐capacity MoS 2 nanoparticles with highly conductive Ti 3 C T x nanosheets form @MoS /NC composite flower‐like architecture. Ultrafine were anchored on primary building blocks sandwich‐like architecture, which not only shortens ion transfer distance but also enlarges layer spacing favoring storage more sodium ions well their transport capacity. Moreover, structures abundant edges can provide an ample active sites pseudocapacitance behavior. As result, displays electrochemical properties excellent cycling stability over 2000 cycles (81.4 % retention) preeminent rate 383 mAh g −1 at 30 A . Furthermore, /NC‖Na V (PO 4 ) full cell 59 0.4 after 180 cycles. This work anode for SIBs provides insight into preparation other composites.

Язык: Английский

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Ether-Based Electrolyte Induced Conversion Behavior of Vanadium Disulfide Enhancing Sodium Ion Storage

Опубликована: Янв. 1, 2024

Vanadium disulfide (VS2) becomes an expectant sodium-ion batteries (SIBs) anode due to its high theoretical capacity and large layer spacing. However, the severe volume change poor reaction kinetics greatly hinder advantages. Moreover, Na-ion storage mechanism of VS2 is still unclear, especially in ether-based electrolyte. Herein, S vacancies-rich flower-like (SF-VS2) fabricated via a hydrothermal strategy. The hierarchical architecture can relieve swelling strengthen structural stability. vacancies improve charge transfer Na+ kinetics. Notably, mechanisms SF-VS2 electrolyte intercalation combined with sodium polysulfide conversion reaction, whereas only exists ester-based Hence, demonstrates exceptional property 655.8 mAh g−1 at ultra-high 20 A after 900 long cycles, which superior Furthermore, assembled Na3V2(PO4)3//SF-VS2 full battery displays stable recyclability fading 0.069% per cycle. This research proposes new inspiration design extraordinary capability transition metal sulfide-based anodes for SIBs.

Язык: Английский

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V2O3 nanoparticles anchored on nitrogen-doped carbon hollow nanospheres as sulfur host for lithium-sulfur batteries

Journal of Electroanalytical Chemistry, Год журнала: 2024, Номер unknown, С. 118881 - 118881

Опубликована: Дек. 1, 2024

Язык: Английский

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