Pyridinic N‐Dominated Hard Carbon with Accessible Carbonyl Groups Enabling 98% Initial Coulombic Efficiency for Sodium‐Ion Batteries

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Июнь 5, 2024

Abstract Hard carbon (HC) has been widely regarded as the most promising anode material for sodium‐ion batteries (SIBs) due to its decent capacity and low cost. However, poor initial Coulombic efficiency (ICE) of HC seriously hinders practical application in SIBs. Herein, pyridinic N‐doped hard polyhedra with easily accessible carbonyl groups situ coupled nanotubes are rationally synthesized via a facile pretreated zeolitic imidazolate framework (ZIFs)‐carbonization strategy. The comprehensive ex/in techniques combined theoretical calculations reveal that synergy pyridinic‐N promoted by pretreatment carbonization process would not only optimize Na + adsorption energy but also accelerate desorption , significantly suppressing irreversible loss. As result, as‐synthesized an can deliver unprecedented high ICE 98% large reversible 389.4 mAh g −1 at 0.03 A . This work may provide effective strategy structural design ICE.

Язык: Английский

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Performance degradation mechanisms and mitigation strategies of hard carbon anode and solid electrolyte interface for sodium-ion battery

Nano Energy, Год журнала: 2024, Номер 128, С. 109920 - 109920

Опубликована: Июнь 28, 2024

Язык: Английский

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Research Progress and Perspectives on Pre‐Sodiation Strategies for Sodium‐Ion Batteries

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Авг. 12, 2024

Abstract Sodium‐ion batteries (SIBs) with abundant elements have garnered significant attention from researches as a promise compensation to lithium‐ion (LIBs). However, the large‐scale commercial application of SIBs is partially hindered by limited initial coulombic efficiency (ICE) due irreversible formation solid electrolyte interphase (SEI) and intercalation into defects in anode. Similar pre‐lithiation techniques, pre‐sodiation approaches are considered be one most direct effective way compensate for loss active sodium at anode side during cycle. In this context, additional ions pre‐injected cathode/anode material chemical/electrochemical methods, aiming improve battery span life energy density. This review delves necessity impact compiling latest research progress, instance, self‐sacrificing cathode additives, over‐sodiated materials, contact solution chemical pre‐sodiation. Notably, mechanisms underlying highlighted. comprehensive overview aims foster deeper understanding techniques expects provide guidance realizing high density sodium‐ion batteries.

Язык: Английский

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A Fast‐Charging and Ultra‐Stable Sodium‐Ion Battery Anode Enabled by N‐Doped Bi/BiOCl in a Carbon Framework

Advanced Energy Materials, Год журнала: 2024, Номер unknown

Опубликована: Июнь 24, 2024

Abstract Owing to the abundant reserves and low cost, sodium‐ion batteries (SIBs) have garnered unprecedented attention. However, their widespread adoption is hindered by scarcity of alternative anodes with fast‐charging capability high stability. To overcome this challenge, a SIB anode, N‐doped Bi/BiOCl embedded in carbon framework (Bi/BiOCl@NC) fast Na + transport channel ultra‐high structural stability, developed. During cycling ether electrolyte, Bi/BiOCl@NC undergoes remarkable transformation into 3D porous skeleton, which significantly reduces pathway accommodates volume changes. By employing density functional theory calculations simulate storage behavior structure, theoretically characterized barrier (0.056 eV) outstanding electronic conductivity. Such unique characteristics induce anode an capacity 410 mAh·g −1 at 20 A·g exhibit stability over 2300 cycles 10 . This study provides rational scenario for design will enlighten more advanced research promote exploitation SIBs.

Язык: Английский

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Highly Reversible Sodium‐ion Storage in A Bifunctional Nanoreactor Based on Single‐atom Mn Supported on N‐doped Carbon over MoS2 Nanosheets

Angewandte Chemie, Год журнала: 2024, Номер 136(43)

Опубликована: Июль 9, 2024

Abstract Conversion‐type electrode materials have gained massive research attention in sodium‐ion batteries (SIBs), but their limited reversibility hampers practical use. Herein, we report a bifunctional nanoreactor to boost highly reversible storage, wherein record‐high degree of 85.65 % is achieved for MoS 2 anodes. Composed nitrogen‐doped carbon‐supported single atom Mn (NC‐SAMn), this concurrently confines active spatially and catalyzes reaction kinetics. In situ/ex situ characterizations including spectroscopy, microscopy, electrochemistry, combined with theoretical simulations containing density functional theory molecular dynamics, confirm that the NC‐SAMn nanoreactors facilitate electron/ion transfer, promote distribution interconnection discharging products (Na S/Mo), reduce Na S decomposition barrier. As result, nanoreactor‐promoted anodes exhibit ultra‐stable cycling capacity retention 99.86 after 200 cycles full cell. This work demonstrates superiority two‐dimensional confined catalytic effects, providing feasible approach improve wide range conversion‐type materials, thereby enhancing application potential long‐cycled SIBs.

Язык: Английский

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Practical and Versatile Sodium‐Ion Batteries Realized With Nitrile‐Based Electrolytes

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 29, 2025

Abstract Sodium‐ion batteries (SIBs) hold tremendous potential in next‐generation energy storage. However, no SIB has yet achieved simultaneous support for high voltage, rapid charging, and all‐climate adaptability due to electrolyte limitations. This study successfully constructs versatile SIBs using an optimized acetonitrile (AN)‐based electrolyte, which offers excellent high‐voltage tolerance, ionic conductivity, anion‐enriched solvation structure, a wide liquidus temperature range. The engineered solid interphase (SEI) exhibits low resistance exceptional stability, effectively supporting fast temperature‐adaptive operation, long‐term cycling stability. Consequently, this tailored combined with robust SEI, enables hard carbon (HC) anodes achieve reversible capacity of 223 mAh g −1 at rate 5 C. When paired NaNi 1/3 Fe Mn O 2 (NFM) cathode, the HC||NFM full cells operate stably cut‐off voltage 4.15 V, sustaining over 1400 cycles Furthermore, practical 3 Ah pouch cell demonstrates retaining 90.7% its after 1000 cycles, shows adaptability, maintaining 56.4% room‐temperature −60 °C 97.3% retention 350 50 °C. work provides valuable insights developing advanced electrolytes SIBs.

Язык: Английский

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Dynamic Sodiation‐Driven Pore Reconstruction for Superior Initial‐Coulombic‐Efficiency and High‐Rate in Xylose‐Based Hard Carbon Anode

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 24, 2025

Abstract The trade‐off between initial coulombic efficiency (ICE) and rate performance of hard carbon anodes remains a challenge in their practical applications, which is highly related to complex active surface porous properties. In this work, high‐performance anode prepared using xylose as the source with Co 2+ ‐assisted catalysis, exhibits an excellent 91.6%, high capacity 396.4 mA h g −1 , superior (176.3 at 5 A ), outstanding cycling stability. Cobalt‐ion treatment forms “expanded” graphite segments, facilitating intercalation desolvated sodium ions. Additionally, intersection these segments creates “nanocaves”, enabling rapid sodium‐ion transport stage. Using combination atomic‐resolution structural characterization three‐dimensional electron tomography via transmission microscopy, it observed that initially isolated nanoporous holes collapsed into interconnected pancake‐like pores during later cycling. reconstructed narrow but connected pore structure provides abundant storage sites charge transfer pathways, effectively accommodating stress This work presents innovative strategy for designing commercial advanced architectures also new insight evolution

Язык: Английский

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The Ether’s Chain Length Effect in Electrolyte for Hard carbon towards Efficient Sodium Storage at Low Temperature

Nano Energy, Год журнала: 2024, Номер 132, С. 110362 - 110362

Опубликована: Окт. 12, 2024

Язык: Английский

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Stress Self‐Adaptive Engineering Advances the Low‐Temperature Na Storage Cycling Stability of Microsized Sn

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 25, 2025

Abstract Microsized Sn (μ‐Sn) is a promising anode material for sodium‐ion batteries that has high theoretical capacity of 847 mAh g −1 and demonstrates phase transition from β‐Sn to α‐Sn below 13 °C, enabling faster ion transport at low‐temperatures. However, it faces challenges such as considerable volume expansion during cycling, unstable solid electrolyte interphase (SEI) formation, an absence effective regulation methods. Herein, “killing three birds with one stone” strategy leveraging stress self‐adaptive engineering proposed achieve low‐temperature cycling stability in μ‐Sn. At the expense partially reversible capacity, lowering temperature increases polarization voltage μ‐Sn sodiation, resulting lower sodiation degree formation dispersed amorphous products, thereby reducing change. This relatively small expansion, compared room temperature, mitigated by high‐mechanical‐strength SEI formed preferred low‐temperature‐resistant electrolyte, suppressing chemomechanical degradation enhancing stability. The exhibits specific 680.9 after 150 cycles −30 which 6.6 times higher than 25 °C. work simple approach obtaining safe high‐performance across broad ranges.

Язык: Английский

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Repair Surface Defects on Biomass Derived Hard Carbon Anodes with N‐Doped Soft Carbon to Boost Performance for Sodium‐Ion Batteries

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 8, 2025

Abstract Biomass‐derived hard carbon (HC), a promising anode material for sodium‐ion batteries with low cost and good cycling ability, has high surface activity that easily reacts the electrolyte, causing initial coulombic efficiency (ICE) poor stability. This article proposes facile synthesis of pine wood‐derived HC N‐doped soft (SC) coating strategy to improve electrochemical performance, especially ICE. The optimized exhibits higher reversible capacity 314.0 mAh g −1 at 30 mA·g greatly enhanced ICE 85.2%, rate performance 260.0 5.0 C. Combined in situ/ex situ characterizations, SC increased closed pores is beneficial improving sodium storage explored as adsorption‐filling behavior, favoring high‐rate performance. Density functional theory (DFT) calculations further revealed nitrogen doping adsorption kinetics provides more sites Na + storage, increasing capacity. work in‐depth insights into modification carbon, offers new opportunities design efficient anodes.

Язык: Английский

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