Constructing Built‐in Electric Field in Heterogeneous Flower‐Like SnS₂@Few‐Layer Ti₃C₂ for Enhanced Charge Transfer Kinetics in Lithium‐ion Capacitors

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 7, 2025

Abstract Lithium‐ion capacitors (LICs) are considered promising advanced energy storage devices due to their combination of high and power density. However, the inherent mismatch in charge rate between anode cathode has forced search for materials with accelerated reaction kinetics. Herein, heterogeneous flower‐like SnS 2 @few‐layer Ti 3 C (SnS @f‐Ti ) composites asymmetric distribution through Sn─O─Ti bonded prepared, which can regulate electronic structure active sites. Moreover, presence f‐Ti substrate suppresses volume expansion , while alleviates interlayer stacking increases sites during charging/discharging processes. Consequently, LICs consisting activated carbon (AC) display density (6.67 kW kg −1 ), (126.26 Wh superior stability. Furthermore, functional theory (DFT) calculations experimental characterizations reveal that built‐in electric field, induced by modulating work function MXene, enables directional electron transfer interfaces, thereby lowering diffusion barrier Li ions boosting electrochemical kinetics composites. This provides guidance designing unique surface‐interface structures carrier transport heterojunctions.

Language: Английский

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Modulating the Spatio‐Temporal Sequence of Lithium Plating and Stripping via a 3D Host for Solid State Batteries

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 27, 2025

Abstract Solid‐state lithium metal batteries (SSLMBs) are now under intensive research for their high energy density and excellent safety. However, the Li transport limitation in anode (LMA) leads to mass/stress accumulation, dendrite initiation void formation at interface, which seriously hinders development of SSLMBs. Herein, it is demonstrated through situ electron microscopies that a mixed ionic‐electronic conducting (MIEC) 3D host can promote LMA by increasing diffusion pathways along carbonaceous framework, carbon/Li interface surface, enabling fast long‐distance (nearly 100 µm) atoms LMA. Consequently, spatio‐temporal sequence plating/stripping be fundamentally changed. Specifically, both deposition dissolution occur far away from thereby mitigating issues. Impressively, resulting cells with hosts achieve cyclability highest capacity (28.8 mAh cm −2 ) so far. This work provides valuable insight understanding deposition/dissolution mechanisms MIEC host‐based LMAs, feasible solution tackling issues without involving stack pressure

Language: Английский

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A Bipartite Synergistic Strategy for All‐Weather Sodium‐Ion Fiber Supercapacitor with Excellent Energy Density and Temperature Adaptability

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Abstract Sodium‐ion fiber supercapacitor (AFSIC) are promising candidates for wearable devices. However, their practical implementation is hindered by the absence of cathodes with fast Na‐ion diffusion kinetics to match anode and poor temperature adaptability conventional electrolytes. To address these challenges, a carbon‐coated NaV 3 O 8 nanowires (NaNVO@C 10 ) low energy barriers designed, enabling rapid reversible intercalation/de‐intercalation. By leveraging liquid crystalline phase induced characteristic graphene oxide (GO), NaNVO@C /rGO cathode fabricated using wet spinning. This achieves large volume capacitive 565 F cm −3 . In parallel, novel dual co‐solvent electrolyte (SLPHNa) developed introducing sulfolane ethylphosphate as co‐solvent. synergistically reshape solvation sheath, thereby improving cycle stability enhancing from −60 80 °C AFSIC. The resulting /rGO//MXene AFSIC exhibits remarkable density 35 mWh , maintains 9.3 even at °C, along an ultra‐long lifespan 000 cycles under all‐weather condition. Moreover, device 82% its initial capacitance after 1000 bending cycles, showing excellent mechanical durability. work offers new insights into development high performance sodium‐ion supercapacitors.

Language: Английский

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In Situ Composite Strategy of O/F-Dual-Doped Soft–Hard Carbon Anode Promotes Ultrafast and Highly Durable Potassium Storage Performance

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: May 8, 2025

Soft-hard carbon has been regarded as a suitable anode material for potassium-ion batteries (PIBs) due to synergistic effects between hard (HC) and soft carbon. However, the cost-effective precise structural control of these carbons remains significant challenge. In this study, O/F-dual-doped soft-hard (OFPC) composite materials with porous honeycomb-like structure are simply synthesized by using an in situ, low-temperature pyrolysis strategy. It is observed that outer wall HC uniformly closely wrapped layer, ensuring excellent electrical conductivity charge-transfer kinetics. Furthermore, O/F codoping can preserve rich defects active sites while enlarging interlayer spacing (0.413 nm). As PIBs, OFPC demonstrates obviously reducing polarization, long-life cycling stability (93% capacity retention rate over 3000 cycles at 1 A g-1), rapid K+ transport kinetics (reversible 47.1% 5 g-1 compared 0.1 g-1). Particularly noteworthy continuous self-optimization during cyclic charge/discharge process adapt large radius K+, which be monitored quantified kinetic analysis situ/ex situ Raman spectra. This work provides facile strategy develop promising anodes advanced PIBs.

Language: Английский

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Exploring the porous organic frameworks with carbonaceous materials for superior electrochemical performance of hybrid supercapacitors

Journal of Electroanalytical Chemistry, Journal Year: 2023, Volume and Issue: 950, P. 117869 - 117869

Published: Oct. 19, 2023

Language: Английский

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Bacterial cellulose-derived porous carbon aerogel containing FeS as the self-supporting anode for high-efficiency lithium-ion storage

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 95, P. 112645 - 112645

Published: June 21, 2024

Language: Английский

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Versatile potassium vanadium fluorophosphate (KVPO4F) composites as Dual-Function cathode and anode materials for Potassium-Ion hybrid capacitors

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 651, P. 534 - 543

Published: Aug. 5, 2023

Language: Английский

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Rational design phosphorylation Mg-Fe layered dioxides nanosheets for efficient capture of uranium from wastewater

Separation and Purification Technology, Journal Year: 2023, Volume and Issue: 326, P. 124862 - 124862

Published: Aug. 21, 2023

Language: Английский

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Nitrogen-Doped Porous Carbon Derived from Coal for High-Performance Dual-Carbon Lithium-Ion Capacitors

Nanomaterials, Journal Year: 2023, Volume and Issue: 13(18), P. 2525 - 2525

Published: Sept. 9, 2023

Lithium-ion capacitors (LICs) are emerging as one of the most advanced hybrid energy storage devices, however, their development is limited by imbalance dynamics and capacity between anode cathode electrodes. Herein, anthracite was proposed raw material to prepare coal-based, nitrogen-doped porous carbon materials (CNPCs), together with being employed a used for dual-carbon lithium-ion (DC-LICs). The prepared CNPCs exhibited folded nanosheet structure pores could be well regulated changing additional amount g-C

Language: Английский

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Achieving High-Energy-Density Graphene/Single-Walled Carbon Nanotube Lithium-Ion Capacitors from Organic-Based Electrolytes

Nanomaterials, Journal Year: 2023, Volume and Issue: 14(1), P. 45 - 45

Published: Dec. 22, 2023

Developing electrode materials with high voltage and specific capacity has always been an important strategy for increasing the energy density of lithium-ion capacitors (LICs). However, organic-based electrolytes lithium salts limit their potential application in LICs to voltages below 3.8 V terms polarization reactions. In this work, we introduce Li[N(C

Language: Английский

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