Tailoring Self‐Catalytic N─Co Bonds into Heterostructure Architectures: Deciphering Polytellurides Conversion Mechanism Toward Ultralong‐Lifespan Potassium Ion Storage

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 11, 2025

Abstract Transition metal tellurides (TMTes) are promising anodes for potassium‐ion batteries (PIBs) due to their high theoretical specific capacity and impressive electronic conductivity. Nevertheless, TMTes suffer from persistent degradation the large volume expansion, ion‐diffusion energy barriers, dissolution/shuttle of potassium polytellurides (K x Te y ). Herein, a heterostructured CoTe 2 composite equipped with self‐catalytic center (N‐CoTe /LTTC) is developed, exploiting its low‐tortuosity tunneling, chemical tunability, properties elevate cycling stability new heights. Systematic experiments have verified that elaborate N‐CoTe /LTTC provides short‐range efficient electron/ion transport path, accelerates K + diffusion kinetics, suppresses huge distortion. Notably, N─Co bonds can promote adsorption capabilities accelerate conversion kinetics under synergistic effect heterojunction. Consequently, optimized electrode delivers an ultralong‑lifespan cyclability (over 25 000 cycles at 2.0 A g −1 , only 0.0019% decay rate per cycle), outperforming those reported Te‐based anodes. Finally, /LTTC//PTCDA@450 full cell manifests 4300 This work uncovers impact catalytic centers on valuable insights rationally designing ultralong‐lifespan PIBs.

Язык: Английский

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Architecting Robust Solid Electrolyte Interface for Enhanced Na+ Storage via Single-Atom ZnN4 Sites Decorating Hard Carbon

Acta Materialia, Год журнала: 2025, Номер unknown, С. 120849 - 120849

Опубликована: Фев. 1, 2025

Язык: Английский

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Effective binding sufficiently-small SiO2 nanoparticles within carbon nanosheets framework enables a high-performing and durable anode for lithium-ion batteries

Journal of Materiomics, Год журнала: 2025, Номер unknown, С. 101053 - 101053

Опубликована: Март 1, 2025

Язык: Английский

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Green Doping and Dual‐Mode Confinement in SnS₂‒P‒SPAN Anodes: Unveiling High‐Performance Sodium/Potassium Ion Full‐Cells Across the Wide Temperature Ranges

SusMat, Год журнала: 2025, Номер unknown

Опубликована: Апрель 28, 2025

ABSTRACT Tin sulfide (SnS 2 ) is a promising anode material for sodium/potassium‐ion batteries (SIBs/PIBs) due to its large interlayer spacing and high theoretical capacity. However, application hindered by sluggish kinetics, volume expansion, low conductivity. In this work, synergistic engineering route proposed that combining environmentally friendly chlorella with sulfurized polyacrylonitrile (SPAN) achieve green doping dual‐mode confinement SnS ‐based anode. The SPAN matrix prevents agglomeration, enhances charge transfer, improves structural stability, while phosphorus (P) accelerates “solid‒solid” conversion kinetics. ‒P‒SPAN demonstrates outstanding sodium/potassium storage performance across wide temperature range (‒40°C 70°C), delivering reversible capacities, excellent rate capability, exceptional long‐term cycling stability. reliability of the as‐developed strategy in ‒P‒SPAN//NaNi 0.4 Fe 0.2 Mn O full cell also verified, which shows strong practical potential capacity long durability (241 mAh g −1 /800 cycles/0.5 A /25°C; 159 /400 /60°C; 105 /‒15°C). associated electrochemical mechanisms are elucidated through comprehensive tests, in/ex situ analyses. calculation unveil P‐doping helps enhance adsorption Na + discharge products. This work may pave way developing yet imperfect electrode materials field energy storage.

Язык: Английский

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Robust Micro‐Sized and Defect‐Rich Carbon–Carbon Composites as Advanced Anodes for Potassium‐Ion Batteries

Small, Год журнала: 2023, Номер 20(4)

Опубликована: Сен. 15, 2023

Abstract Pitch‐derived carbon (PC) anode features the merits of low‐cost, rich edge‐defect sites, and tunable crystallization degree for potassium ion batteries (PIBs). However, gaining PC with both sites robust structure remains challenging. Herein, micro‐sized PC/expanded‐graphite (EG) composites (EGC) are massively synthesized via melting impregnation confined pyrolysis. The is in situ encapsulated EG skeleton chemical bonds between after thermal treatment, endowing structural stability as carbon–carbon composites. confinement effect originating from could suppress contribute EGC Additionally, inside form continuous electronic conduction nets establish low‐tortuosity carbonaceous electrodes, facilitating rapid electron/ion migration. While applied PIBs, delivers a reversible capacity that up to 338.5 mAh g ‒1 at 0.1 A , superior rate performance 127.5 5.0 long‐term 204.8 retain 700 cycles 1.0 . This novel strategy highlights an interesting category heterogeneous composite materials keep pace demand future PIBs industry.

Язык: Английский

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Enhancing potassium‐ion storage of Bi₂S₃ through external–internal dual synergism: Ti₃C₂T_x compositing and Cu²⁺ doping

Carbon Energy, Год журнала: 2024, Номер 6(9)

Опубликована: Апрель 17, 2024

Abstract Potassium‐ion batteries (PIBs) offer a cost‐effective and resource‐abundant solution for large‐scale energy storage. However, the progress of PIBs is impeded by lack high‐capacity, long‐life, fast‐kinetics anode electrode materials. Here, we propose dual synergic optimization strategy to enhance K + storage stability reaction kinetics Bi 2 S 3 through two‐dimensional compositing cation doping. Externally, nanoparticles are loaded onto surface three‐dimensional interconnected Ti C T x nanosheets stabilize structure. Internally, Cu 2+ doping acts as active sites accelerate kinetics. Various theoretical simulations ex situ techniques used elucidate external–internal synergism. During discharge, collaboratively facilitate intercalation. Subsequently, primarily promotes fracture bonds, facilitating conversion reaction. Throughout cycling, composite structure sustain functionality. The resulting ‐doped anchored on (C‐BT) shows excellent rate capability (600 mAh g –1 at 0.1 A ; 105 5.0 ) cycling performance (91 after 1000 cycles) in half cells high density (179 Wh kg full cells.

Язык: Английский

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3D Micro‐Flower Structured BiFeO₃ Constructing High Energy Efficiency/Stability Potassium Ion Batteries Over Wide Temperature Range

Advanced Functional Materials, Год журнала: 2024, Номер 34(19)

Опубликована: Янв. 14, 2024

Abstract The fatty K + ion calls for suitable host materials to meet the requirement high safety and long‐term stability of potassium‐ion batteries (PIBs) rival lithium‐ion batteries, thus anode possessing capacity, stability, well‐defined plateaus involving favorable working voltage (≈0.5 V) have always been desired. Here, a 3D BiFeO 3 with micro‐flower structure (BFO‐MF) constructed by nanosheets is proposed as an PIBs. Density functional theory calculations evidence that intrinsically affinity diffusion render fast electrochemical kinetics attenuated voltage‐hysteresis, measurements indicate stable BFO‐MF enables achieve impressive performances including capacity 606 mAh g −1 , flat at ≈0.5 V, 5000 cycles 500 mA 100 upon −20 °C. In situ ex characterizations definitely elucidate conversion alloy/dealloy mechanism. satisfying features ensure full‐cells excellent cyclic performances, energy efficiency retention rate ≈98.2% cathode, density/power density output up 177.1 Wh kg /2152.8 W respectively. This work can provide new insights developing advanced anodes

Язык: Английский

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Constructing High‐Content Sb Atomic Clusters and Robust Sb─O─C Bond in Sb/C Composites for Ultrahigh Rate and Long‐Term Sodium Storage

Advanced Functional Materials, Год журнала: 2024, Номер 34(33)

Опубликована: Апрель 19, 2024

Abstract Constructing Sb atomic clusters with obvious size effect in Sb/C composites has great potential for boosting electrochemical reactivity toward ultrahigh rate and long‐term sodium storage. However, how to balance the contradiction between ultra‐small of high loading a specific composite is an unprecedented challenge. Here, facile situ vaporization‐reduction strategy presented preparing clusters@N, S co‐doped carbon networks (Sb ACs@NSC). Featuring content (45.30 wt%, ICP) superior activity, robust Sb─O─C bond N, conductive matrix, ACs@NSC electrode possessed ultrafast kinetics impressive cycling stability providing capability 245.7 mAh g −1 at 80 A maintaining highlighted capacity 306.7 after 1000 cycles under 10 , outperforming all reported Sb‐based materials SIBs. The DFT calculations further revealed that matrix are beneficial stable adsorption capabilities fast Na + . designing compromised dense powerful interface will light on developing advanced energy storage conversion.

Язык: Английский

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High-entropy perovskite fluoride ultrasmall nanoparticles embedded in carbon nanofibers enable accelerated redox kinetic for K storage

Energy & Environmental Science, Год журнала: 2024, Номер 17(19), С. 7362 - 7371

Опубликована: Янв. 1, 2024

Ultrasmall high-entropy perovskite fluoride nanoparticles impregnated in carbon nanofibers are prepared by electrospinning and pyrolysis. The unique structure prevents the conversion reaction shows a low-strain intercalation mechanism.

Язык: Английский

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Defect-engineered WS_xSe_2−x nanocrystals anchored on selenized polyacrylonitrile fibers toward high-performance sodium/potassium-ion batteries with a wide working temperature range

Inorganic Chemistry Frontiers, Год журнала: 2024, Номер 11(7), С. 2164 - 2177

Опубликована: Янв. 1, 2024

WSSe-Se@PAN was fabricated by the electrospinning route combined with selenization treatment. It exhibited a wide working temperature range for SIB/PIB applications.

Язык: Английский

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