Tailoring anion-dominant solvation environment by steric-hindrance effect and competitive coordination for fast charging and stable cycling lithium metal batteries

Journal of Energy Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

Language: Английский

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Advances in Anion Chemistry in the Electrolyte Design for Better Lithium Batteries

Nano-Micro Letters, Journal Year: 2025, Volume and Issue: 17(1)

Published: Feb. 17, 2025

Abstract Electrolytes are crucial components in electrochemical energy storage devices, sparking considerable research interest. However, the significance of anions electrolytes is often underestimated. In fact, have significant impacts on performance and stability lithium batteries. Therefore, comprehensively understanding anion chemistry importance. Herein, in-depth comprehension its positive effects interface, solvation structure Li-ions, as well batteries been emphasized summarized. This review aims to present a full scope furnish systematic cognition for rational design advanced better with high density, lifespan, safety. Furthermore, insightful analysis perspectives based current proposed. We hope that this sheds light new electrolytes.

Language: Английский

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Water‐Lean Inner Helmholtz Plane Enabled by Tetrahydropyran for Highly Reversible Zinc Metal Anode

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(46)

Published: Aug. 17, 2024

Abstract The reversibility and stability of zinc (Zn) metal anode are closely related to inner Helmholtz plane (IHP) chemistry. H 2 O‐rich IHP raises severe parasitic reactions irregular Zn deposition, impeding the practical utility in aqueous Zn‐ion batteries (AZIBs). In this study, tetrahydropyran (THP), a five‐carbon heterocyclic ether with permanent dipole moment hydrophobic characteristic, is introduced as self‐adsorptive additive reshape IHP. It squeezes out partial O molecules forms O‐lean IHP, benefitting for alleviating active decomposition improving anode. Moreover, adsorbed THP induces preferential nucleation (002) plane, facilitating dendrite‐free growth Consequently, Zn||Zn symmetric cell enables cycle over 3600 h at 5 mA cm −2 @ 1 mAh . Zn||Cu half‐cell can stably 400 cycles 99.9% coulombic efficiency even under harsh test conditions (10 @5 ) 30 µm foil. Zn||NH 4 V 10 full maintains 92.6% capacity retention after 800 A g −1 Zn||I perform steadily 10000 decay rate merely 0.003% per C.

Language: Английский

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Microsolvating Competition in Li⁺ Solvation Structure Affording PC‐Based Electrolyte with Fast Kinetics for Lithium‐Ion Batteries

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: June 27, 2024

Abstract Lithium‐ion batteries (LIBs) suffer from energy loss and safety hazards under high‐rate conditions, because of the sluggish electrochemical kinetics unstable interfacial passivation. Herein, a PC‐based electrolyte using weakly solvated solvent ethyl trifluoroacetate is developed to improve stability in LIBs. A microsolvating competition revealed bulk electrolyte, forming loose Li + coordination configuration with benign affinity high ionic conductivity. Furthermore, an inorganic‐rich interphase constructed on graphite anode, affording smooth desolvation reliable Consequently, NCM622/graphite cell shows improved cycling (82.2% after 200 cycles) rate capability (83% at 4C compared 0.1C) high‐voltage 4.5 V, much better than those EC‐based (76.2% cycles 74% 4C). Additionally, affords reversible operation –40 °C while fails °C. This work highlights potential solvation structure engineering for low‐energy‐barrier electrolyte.

Language: Английский

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Breaking Anionic Solvation Barrier for Safe and Durable Potassium‐ion Batteries Under Ultrahigh‐Voltage Operation

Angewandte Chemie, Journal Year: 2025, Volume and Issue: 137(14)

Published: April 1, 2025

Abstract Ultrahigh‐voltage potassium‐ion batteries (PIBs) with cost competitiveness represent a viable route towards high energy battery systems. Nevertheless, rapid capacity decay poor Coulombic efficiencies remains intractable, mainly attributed to interfacial instability from aggressive potassium metal anodes and cathodes. Additionally, reactivity of K flammable electrolytes pose severe safety hazards. Herein, weakly solvating fluorinated electrolyte intrinsically nonflammable feature is successfully developed enable an ultrahigh‐voltage (up 5.5 V) operation. Through breaking the anionic solvation barrier, synergistic modulation can be achieved by formation robust anion‐derived inorganic‐rich electrode‐electrolyte interfaces on both cathode anode. As proof concept, representative KVPO 4 F sustain 1600 cycles 84.4 % retention at cutoff voltage 4.95 V. Meanwhile, plating/stripping process in our designed also demonstrates optimized electrochemical reversibility stability effectively inhibited dendrites. These findings underscore critical impact anion‐dominated configuration properties. This work provides new insights into rational design safe for advanced PIBs.

Language: Английский

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Wide-temperature and high-voltage Li||LiCoO2 cells enabled by a nonflammable partially-fluorinated electrolyte with fine-tuning solvation structure

Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 1, 2024

Language: Английский

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Multidentate ether-induced reconfiguration of solvation structure in non-flammable phosphate electrolytes for wide-temperature application in lithium-ion batteries

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

Conventional carbonate electrolytes fail to meet the requirements for lithium-ion batteries (LIBs) with wide temperature range and high safety. Diethyl ethylphosphonate (DEEP) has excellent flame retardancy a (-83 198°C), which holds promise developing non-flammable electrolyte wide-temperature application in LIBs. However, its limited compatibility graphite electrodes slow ionic transport capability must be addressed effective application. Herein, we introduce diethylene glycol dimethyl ether (DEGDME) reconfigure solvation structure of DEEP-based further enhance ion capacity. The film-forming additives enable preserve 98% capacity retention after 150 cycles Li||Graphite cells modified DEGDME improved low-temperature performance achieving 71% 50th-cycle Graphite||LiFePO₄ at -20°C. This work introduces new strategy designing phosphate electrolytes, enabling reliable safe LIBs across range.

Language: Английский

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Review and Future Perspectives on Lithium Battery Fire Safety: Focusing on Design of Organic Components

Energy & environment materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 28, 2025

The widespread use of lithium batteries has led to frequent fire hazards, which significantly threaten both human lives and property safety. One the primary challenges in enhancing safety lies flammability their organic components. As electronic devices continue proliferate, integration liquid electrolytes separators become common. However, these components are prone high volatility leakage, limits Fortunately, recent advancements solid‐state gel have demonstrated promising performance laboratory settings, providing solutions issues. Typically, improving flame retardancy involves careful design formulations or molecular structures materials. Moreover, internal interfacial interactions also play a vital role ensuring This review examines innovative strategies developed over past 5 years address concerns associated with batteries. Future next generation high‐safety should not only focus on optimizing component but emphasize rigorous operational testing. dual approach will drive further progress battery research development, overall reliability systems.

Language: Английский

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Can Difluoroethylene Carbonate Replace Fluoroethylene Carbonate for High-Performance Lithium-Ion Cells at High Voltage?

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

Published: March 25, 2025

To date, optimizing electrolytes has become a promising approach to enable high-voltage, high-performance lithium-ion cells. Herein, study is performed evaluate the potential of difluoroethylene carbonate (DFEC) replace fluoroethylene (FEC) and deliver comparable or even superior performance at high voltage. It unveiled that moderately increasing lithium salt inside DFEC-based electrolyte enhances high-voltage cells, with outperforming FEC-based counterpart. Moreover, also fits LiFePO4 system where illustrated when charged 3.8 4.0 V. As result low binding energy between DFEC Li+, an anion-rich solvation structure formed by electrolyte, facilitating Li+ intercalation/deintercalation forming inorganic-rich passivation layers. In addition, cell's electrode-electrolyte interface well-protected due film property DFEC, thin, smooth, robust layer generated efficiently prevents electrode from side reactions under Furthermore, cells containing it demonstrate safety properties exposed typical testing. Hence, shown be viable alternative FEC for enabling sound-performance

Language: Английский

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Constructing a 5.2 V High-Voltage Electrolyte via TMSB Additive Enables Ultrahigh Rate Performance Graphite-Based Dual-Ion Batteries

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: April 28, 2025

The development of carbon-based dual-ion batteries (DIBs) is essentially limited by the oxidation decomposition electrolyte at high voltage and unsatisfactory stability cathode-electrolyte interface (CEI). Herein, to address these notorious issues, we successfully achieved a high-performance DIB introducing Tris(trimethylsiloxy)boron (TMSB) additive. It effectively regulated solvation structure original 2 M LiPF6-solved EMC electrolyte. As result, it not only weakens coordination between PF6- anion solvent but also suppresses cathode interface. Such regulation facilitates formation stable CEI layer enriched with highly ion-conductive inorganic components. Benefitting from optimized interfacial kinetics, graphite delivers exceptional rate capability, achieving 87.86% capacity retention after 2000 cycles 5.2 V 84.21% 50 C.

Language: Английский

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