Electrolyte Solvent‐Ion Configuration Deciphering Lithium Plating/Stripping Chemistry for High‐Performance Lithium Metal Battery

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 23, 2025

Abstract Electrolyte engineering plays a critical role in tuning lithium plating/stripping behaviors, thereby enabling safer operation of metal anodes batteries (LMBs). However, understanding how electrolyte microstructures influence the process at molecular level remains significant challenge. Herein, using commonly employed ether‐based as model, each component is elucidated and relationship between behavior established by investigating effects compositions, including solvents, salts, additives. The variations Li + deposition kinetics are not only analyzed characterizing overpotential exchange current density but it also identified that intermolecular interactions previously unexplored cause these 2D nuclear overhauser effect spectroscopy (NOESY). An interfacial model developed to explain solvent interactions, distinct roles anions, additives desolvation thermodynamic stability clusters during process. This clarifies configurations solvents ions related macroscopic properties chemistry. These findings contribute more uniform controllable deposition, providing valuable insights for designing advanced systems LMBs.

Язык: Английский

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Superspreading‐Based Fabrication of Thermostable Nanoporous Polyimide Membranes for High Safety Separators of Lithium‐Ion Batteries

Small, Год журнала: 2024, Номер 20(27)

Опубликована: Янв. 23, 2024

Abstract The development of thermally stable separators is a promising approach to address the safety issues lithium‐ion batteries (LIBs) owing serious shrinkage commercial polyolefin at elevated temperatures. However, achieving controlled nanopores with uniform size distribution in thermostable polymeric and high electrochemical performance still great challenge. In this study, nanoporous polyimide (PI) membranes excellent thermal stability as high‐safety developed for LIBs using superspreading strategy. polyamic acid solutions enables generation thin liquid layers, facilitating formation PI controllable narrow ranging from 121 ± 5 nm 86 6 nm. Such display structural temperatures up 300 °C least 1 h. assembled show specific capacity Coulombic efficiency can work normally after transient treatment temperature (150 20 min) ambient temperature, indicating their application rechargeable batteries.

Язык: Английский

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Working Principles of High-Entropy Electrolytes in Rechargeable Batteries

ACS Energy Letters, Год журнала: 2024, Номер 9(6), С. 2960 - 2980

Опубликована: Май 28, 2024

Rechargeable batteries are considered to be one of the most feasible solutions energy crisis and environmental pollution. As a bridge between cathode anode battery, electrolytes play critical roles in improving battery performance. Recently, high-entropy (HEEs) with unique properties were proposed. Specifically, HEEs can accelerate ionic diffusion kinetics promote dissolution salts as well broaden operating temperature batteries. This Review provides comprehensive summary application working mechanisms rechargeable First, motivation, history, definitions introduced. Then, enhancing electrochemical performance liquid solid-state presented, especially conductivity achieving wide range. Finally, current issues possible future directions new perspective on design high-performance electrolytes.

Язык: Английский

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Temperature-responsive solvation enabled by dipole-dipole interactions towards wide-temperature sodium-ion batteries

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Окт. 14, 2024

Rechargeable batteries with high durability over wide temperature is needed in aerospace and submarine fields. Unfortunately, Current battery technologies suffer from limited operating temperatures due to the rapid performance decay at extreme temperatures. A major challenge for wide-temperature electrolyte design lies restricting parasitic reactions elevated while improving reaction kinetics low Here, we demonstrate a temperature-adaptive by regulating dipole-dipole interactions various simultaneously address issues both subzero This approach prevents degradation endowing it ability undergo adaptive changes as varies. Such favors form solvation structure thermal stability rising transits one that salt precipitation lower ensures stably within range of ‒60 −55 °C. opens an avenue design, highlighting significance structures. High instability sluggishness electrolytes pose significant barriers towards sodium-ion batteries. authors report

Язык: Английский

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Enabling High‐Performance Potassium‐Ion Batteries by Manipulating Interfacial Chemistry

Advanced Functional Materials, Год журнала: 2024, Номер 34(21)

Опубликована: Янв. 30, 2024

Abstract As a promising candidate for the flame‐retardant electrolyte, triethyl phosphate (TEP)/potassium bis(fluorosulfonyl)amide (KFSI)‐based electrolyte has drawn much attention in K‐ion battery community. Although TEP/KFSI formula at moderate main salt concentration (normally, <3 m ) enables compatibility of reactive K metal anode, long‐standing oxidative instability KFSI remains unsolved. Here, an additive strategy is reported to address high‐voltage issue and generalize it other KFSI‐based electrolytes. The addition potassium nitrate changes surface charge distribution effectively suppresses decomposition toward cathode. nitrate‐containing superior stability 4.3 V‐class battery, as evidenced by its 80% capacity retention over 2000 cycles (≈6 months) 1 C rate. Moreover, long‐cycling graphite‐based full cell with Prussian Blue cathode demonstrated.

Язык: Английский

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A novel cathode interphase formation methodology by preferential adsorption of a borate-based electrolyte additive

National Science Review, Год журнала: 2024, Номер 11(8)

Опубликована: Июнь 25, 2024

The coupling of high-capacity cathodes and lithium metal anodes promises to be the next generation high-energy-density batteries. However, fast-structural degradations cathode anode challenge their practical application. Herein, we synthesize an electrolyte additive, tris(2,2,3,3,3-pentafluoropropyl) borane (TPFPB), for ultra-stable (Li) metal||Ni-rich layered oxide It can preferentially adsorbed on surface form a stable (B F)-rich interface film, which greatly suppresses electrolyte-cathode side reactions improves stability cathode. In addition, electrophilicity B atoms in TPFPB enhances solubility LiNO

Язык: Английский

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Unveiling Confinement Engineering for Achieving High‐Performance Rechargeable Batteries

Advanced Materials, Год журнала: 2024, Номер 36(25)

Опубликована: Март 7, 2024

Abstract The confinement effect, restricting materials within nano/sub‐nano spaces, has emerged as an innovative approach for fundamental research in diverse application fields, including chemical engineering, membrane separation, and catalysis. This principle recently presents fresh perspectives on addressing critical challenges rechargeable batteries. Within spatial confinement, novel microstructures physiochemical properties have been raised to promote the battery performance. Nevertheless, few clear definitions specific reviews are available offer a comprehensive understanding guide utilizing effect review aims fill this gap by primarily summarizing categorization of effects across various scales dimensions systems. Subsequently, strategic design environments is proposed address existing These solutions involve manipulation physicochemical electrolytes, regulation electrochemical activity, stability electrodes, insights into ion transfer mechanisms. Furthermore, provided deepen foundational achieving high‐performance Overall, emphasizes transformative potential tailoring microstructure electrode materials, highlighting their crucial role designing energy storage devices.

Язык: Английский

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Inhibiting lattice strain for highly stable and long-life Li-rich Mn-based layered cathodes

Rare Metals, Год журнала: 2025, Номер unknown

Опубликована: Янв. 23, 2025

Язык: Английский

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Electrolyte design weakens lithium-ion solvation energy for a fast-charging and long-cycling Si anode

Chemical Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Silicon (Si) is considered a promising anode material for next-generation lithium-ion batteries due to its high theoretical specific capacity and earth-abundancy. However, challenges such as significant volume expansion, unstable solid electrolyte interphase (SEI) formation in incompatible electrolytes, slow transport lead poor cycling rate performance. In this work, it demonstrated that superior cyclability capability of Si anodes can be achieved using ethyl fluoroacetate (EFA) fluoroethylene carbonate (FEC) solvents with low binding energy Li+ but sufficiently relative dielectric constants. By weakening the interaction between solvent, barrier desolvation process lowered, while ensuring conductivity diffusion Li+. As result, silicon-carbon optimized exhibits excellent performance, work reversibly 1709.1 mAh g-1 proceeds over 250 cycles retains 85.2% at 0.2C. Furthermore, Si/C‖LiFePO4 (LFP) full cell shows an extended service life more than 500 cycles. This offers valuable insights into design weakly solvating electrolytes high-performance Si-based batteries.

Язык: Английский

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A Temperature‐Adapted Ultraweakly Solvating Electrolyte for Cold‐Resistant Sodium‐Ion Batteries

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 26, 2025

Abstract Sodium‐ion batteries are applied to cold‐resistant energy storage hindered by phase transitions and sluggish Na + migration of traditional carbonate‐based electrolytes at low temperatures. The desolvation is a crucial step in impeding the transport , which primarily attributes robust solvent coordination . Herein, low‐temperature adaptive electrolyte with an ultraweakly coordinated 1,3‐dioxolane (DOL) designed for constructing anion‐rich solvation structure diglyme (G2)‐based electrolyte. electronegativity oxygen atoms G2 attenuated dipole‐dipole interaction between DOL G2. As temperature drops, weakened ‒O (G2) leads increased anionic less coordination, facilitating This anionic‐enhanced contributes formation stable solid interface hard carbon (HC) anode, accelerates diminishing voltage polarization Consequently, HC anode can retain high capacity 203.9 mAh g ‒1 (1 C) ‒50 °C, pouch cell composed HC||Na 3 V 2 (PO 4 ) ‒30 °C achieves retention 92.43% after 100 cycles 0.1 C. strategy guides design ultra‐low broadens range applications sodium‐ion batteries.

Язык: Английский

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