2D‐Layer‐Structure Bi to Quasi‐1D‐Structure NiBi₃: Structural Dimensionality Reduction to Superior Sodium and Potassium Ion Storage

Advanced Materials, Год журнала: 2023, Номер 35(41)

Опубликована: Авг. 7, 2023

Layer-structured bismuth (Bi) is an attractive anode for Na-ion and K-ion batteries due to its large volumetric capacity suitable redox potentials. However, the cycling stability rate capability of Bi are restricted by volume expansion sluggish Na/K-storage kinetics. Herein, a structural dimensionality reduction strategy proposed developed converting 2D-layer-structured into quasi-1D structured NiBi3 with enhanced reaction kinetics reversibility realize high-rate stable performance Na/K-ion storage. As proof concept, intermetallic low formation energy, metallic conductivity, 3D diffusion pathways delivers outstanding retention 94.1% (332 mAh g-1 ) after 15 000 cycles storage, high initial coulombic efficiency 93.4% improved Moreover, investigations on highly reversible mechanisms cycling-driven morphology reconstruction further reveal origins accommodation expansion. The finding this work provides new high-performance design manipulation reconstruction.

Язык: Английский

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Fast‐Charging Anode Materials for Sodium‐Ion Batteries

Advanced Materials, Год журнала: 2024, Номер 36(35)

Опубликована: Июнь 26, 2024

Sodium-ion batteries (SIBs) have undergone rapid development as a complementary technology to lithium-ion due abundant sodium resources. However, the extended charging time and low energy density pose significant challenge widespread use of SIBs in electric vehicles. To overcome this hurdle, there is considerable focus on developing fast-charging anode materials with Na⁺ diffusion superior reaction kinetics. Here, key factors that limit fast are examined, which provides comprehensive overview major advances characteristics across various materials. Specifically, it systematically dissects considerations enhance rate performance materials, encompassing aspects such porous engineering, electrolyte desolvation strategies, electrode/electrolyte interphase, electronic conductivity/ion diffusivity, pseudocapacitive ion storage. Finally, direction prospects for also proposed, aiming provide valuable reference further advancement high-power SIBs.

Язык: Английский

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Tailoring the Electrochemical Responses of MOF‐74 Via Dual‐Defect Engineering for Superior Energy Storage

Advanced Materials, Год журнала: 2024, Номер 36(31)

Опубликована: Май 23, 2024

Rationally designed defects in a crystal can confer unique properties. This study showcases novel dual-defects engineering strategy to tailor the electrochemical response of metal-organic framework (MOF) materials used for energy storage. Salicylic acid (SA) is identified as an effective modulator control MOF-74 growth and induce structural defects, cobalt cation doping adopted introducing second type defect. The resulting engineered bimetallic MOF exhibits discharging capacity 218.6 mAh g

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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Facile Galvanic Replacement Construction of Bi@C Nanosheets Array as Binder‐Free Anodes for Superior Sodium‐Ion Batteries

Advanced Energy Materials, Год журнала: 2024, Номер 14(30)

Опубликована: Май 15, 2024

Abstract Bismuth (Bi) possesses an ultrahigh theoretical volume capacity (3800 mAh cm −3 ) and low embedding potential stimulated considerable attention as anodes for sodium‐ion batteries (SIBs). However, its practical application is still hampered by the huge variation during charge/discharge process. To settle this issue, Bi@C nanosheet arrays (Bi@C‐NSA) are fabricated on copper foam via a facile galvanic replacement followed in situ polymerization of dopamine annealing procedure. The carbon‐coated array structure not only accommodates expansion cycling maintains electrode stability, but also facilitates rapid electron/ion transport. Due to unique structural design, Bi@C‐NSA exhibits impressive 315.72 g −1 after 1500 cycles under 1 A . Furthermore, series situ/ex techniques reveal that superior reaction kinetics undergoes typical alloying/dealloying storage mechanism. achieves commendable reversible stability wide temperature range (0 °C–60 °C). Notably, assembled Na 3 V 2 (PO 4 //Bi@C‐NSA full cell demonstrates 325 50 at 0.05 , which promises applications. This strategy spearheads way prepare nanoarray electrodes will accelerate development batteries.

Язык: Английский

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Molecular‐Level Design of High Flash Point Solvents Enables High‐Safety and Dual‐Function Chemical Presodiation of Hard Carbon and Alloy Anodes for High‐Performance Sodium‐Ion Batteries

Advanced Energy Materials, Год журнала: 2024, Номер 14(24)

Опубликована: Апрель 1, 2024

Abstract Hard carbon (HC) is subjected to low initial Coulombic efficiency (ICE) and unsteady solid electrolyte interphase (SEI), which limits the energy density cycling performance. Meanwhile, studies related emerging chemical presodiation have specifically focused on proper redox potential overlooked its safety hazard. To address these drawbacks of HC presodiation, a series high‐safety solutions based tetraethylene glycol dimethyl ether (TEGDME) are proposed for uniform fast Bi anodes. Among them, Na‐4‐methylbiphenyl in TEGDME solution exhibits lowest (0.146 V vs Na + /Na), achieves inhibition irreversible sodium uptake. Meantime, potential‐driven decomposition fluoroethylene carbonate endows presodiated (pNa‐HC) fast‐ion conducting robust F‐rich SEI. Accordingly, pNa‐HC delivers an ideal ICE 99.1% compared (65.28%). significantly enhanced rate performance life (193.39 mAh g −1 after 2300 cycles at 1000 mA ) benefiting from reduced kinetic barriers. When pairs with 3 2 (PO 4 cathode, full cell demonstrates desirable 91.25%. This work provides novel universal solvent design strategy realize pre‐metallation.

Язык: Английский

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Machine learning in energy storage material discovery and performance prediction

Chemical Engineering Journal, Год журнала: 2024, Номер 492, С. 152294 - 152294

Опубликована: Май 16, 2024

Язык: Английский

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Enable the Domino‐Like Structural Recovering in Bismuth Anode to Achieve Fast and Durable Na/K Storages

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(29)

Опубликована: Апрель 29, 2024

Abstract Alloying‐type anodes show capacity and density advantages for sodium/potassium‐ion batteries (SIBs/PIBs), but they encounter serious structural degradation upon cycling, which cannot be resolved through conventional nanostructuring techniques. Herein, we present an in‐depth study to reveal the intrinsic reason pulverization of bismuth (Bi) materials (de)alloying, report a novel particle‐in‐bulk architecture with Bi nanospheres inlaid in bulk carbon (BiNC) achieve durable Na/K storage. We simulate volume‐expansion‐resistant mechanism during (de)alloying reaction, unveil that irreversible phase transition underlies fundamental origin anode, while proper compressive stress (~10 %) raised by can trigger “domino‐like” crystal recovering. Consequently, as obtained BiNC exhibits record high volumetric (823.1 mAh cm −3 SIBs, 848.1 PIBs) initial coulombic efficiency (95.3 % 96.4 PIBs), unprecedented cycling stability (15000 cycles SIBs only 0.0015 per cycle), outperforming state‐of‐the‐art literature. This work provides new insights on undesirable evolution, proposes basic guidelines design anti‐degradation structure alloy‐type electrode materials.

Язык: Английский

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1D Insertion Chains Induced Small‐Polaron Collapse in MoS₂ 2D Layers Toward Fast‐Charging Sodium‐Ion Batteries

Advanced Materials, Год журнала: 2023, Номер 36(6)

Опубликована: Ноя. 21, 2023

Abstract Molybdenum disulfide (MoS 2 ) with high theoretical capacity is viewed as a promising anode for sodium‐ion batteries but suffers from inferior rate capability owing to the polaron‐induced slow charge transfer. Herein, polaron collapse strategy induced by electron‐rich insertions proposed effectively solve above issue. Specifically, 1D [MoS] chains are inserted into MoS break symmetry states of 2D layers and induce small‐polaron gain fast transfer so that as‐obtained thermodynamically stable Mo S 3 shows metallic behavior 10 7 times larger electrical conductivity than . Theoretical calculations demonstrate owns highly delocalized anions, which substantially reduce interactions Na−S efficiently accelerate Na + diffusion, endowing lower energy barrier (0.38 vs 0.65 eV ). The novel exhibits 510 mAh g −1 at 0.5 C superior high‐rate stability 217 40 over 15 000 cycles. Further in situ ex characterizations reveal in‐depth reversible redox chemistry intrinsically facilitating can be conducive electrode design fast‐charging batteries.

Язык: Английский

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2D Mesoporous Naphthalene‐Based Conductive Heteroarchitectures toward Long‐Life, High‐Capacity Zinc‐Iodine Batteries

Advanced Functional Materials, Год журнала: 2023, Номер 34(4)

Опубликована: Окт. 25, 2023

Abstract Nowadays, rechargeable aqueous zinc‐iodine batteries have attracted extensive attention due to their low cost, high safety, and theoretical capacity. However, the poor electrical conductivity of iodine shuttling effect soluble polyiodide ions impose an insurmountable constraint on performance. Here, a facile soft‐hard‐templated co‐assembly strategy is proposed fabricate naphthalene‐based heteroarchitectured conductive nanosheets with ordered mesopore arrays (≈10 nm), uniform thickness (24.5 specific surface area (221.5 m 2 g −1 ), good electronic (3.9 × 10 −3 S cm ). Density function theory calculation systematic experimental results show that complementary combination 2D polar semiconducting polymer chains carbon framework enables highly efficient immobilization then constrains through strong physicochemical interactions. Accordingly, resultant deliver capacity 271.4 mAh , excellent rate capability, impressive long‐term cycling stability (35 000 cycles at current density A superior most previous reports. This study opens new venues for rationally constructing porous materials energy storage applications.

Язык: Английский

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