Anion‐Dominated Conventional‐Concentrations Electrolyte to Improve Low‐Temperature Performance of Lithium‐Ion Batteries

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(33)

Published: March 26, 2024

Abstract Low temperatures (< −20 °C) significantly diminish lithium‐ion battery performance due to freezing issues within commercial electrolytes and the high energy barrier for Li + desolvation at interface. Although high‐concentration localized enhance kinetics featuring anion‐participated solvation structures, their viscosity propensity salt precipitation render them unsuitable low‐temperature environments. This study introduces an anion‐dominated conventional‐concentrations electrolyte (ACCE) created by incorporating Lithium difluorophosphate(LiPO 2 F )into a 1 M bis((trifluoromethyl)sulfonyl)azanide(LiTFSI) Dimethyl carbonate(DMC)/Fluoroethylene carbonate(FEC)/Methyl acetate(MA) solution. LiPO , characterized its poor solubility strong binding with demonstrates pronounced tendency integrate into primary sheath of . Moreover, synergy between LiTFSI establishes dual anion configuration, unveiling anion‐driven mechanism. mechanism diminishes interaction solvent molecules, resulting in reduced under low temperatures. The ACCE exhibits ionic conductivity 1.3 mS cm −1 −50 °C, enabling stable cycling Li/NCM811 cells further allows 0.75 Ah graphite(Gr)/LiNi 0.8 Co 0.1 Mn O (NCM811) batteries dischargeable −40 °C. presents practical application potential poorly soluble lithium salts provides new avenue designing suitable applications.

Language: Английский

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Thermodynamic and Kinetic Behaviors of Electrolytes Mediated by Intermolecular Interactions Enabling High-Performance Lithium-Ion Batteries

ACS Nano, Journal Year: 2024, Volume and Issue: 18(33), P. 22503 - 22517

Published: Aug. 7, 2024

Electrolyte solvation chemistry regulated by lithium salts, solvents, and additives has garnered significant attention since it is the most effective strategy for designing high-performance electrolytes in lithium-ion batteries (LIBs). However, achieving a delicate balance persistent challenge, given that excessively strong or weak Li+-solvent coordination markedly undermines electrolyte properties, including thermodynamic redox stability Li+-desolvation kinetics, limiting practical applications. Herein, we elucidate crucial influence of solvent–solvent interactions modulating Li+-solvation structure to enhance kinetic properties. As paradigm, combining strongly coordinated propylene carbonate (PC) with weakly cyclopentylmethyl ether (CPME), identified intermolecular between PC CPME using 1H–1H correlation spectroscopy. Experimental computational findings underscore role regulating Li+-solvent/anion interactions, which can both (i.e., antireduction capability) process) aspects electrolytes. Additionally, introduced an interfacial model reveal intricate relationship electrode behaviors at molecular scale. This study provides valuable insights into critical impact on are pivotal guiding future efforts functionalized engineering metal-ion batteries.

Language: Английский

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Advanced Electrolytes for Rechargeable Lithium Metal Batteries with High Safety and Cycling Stability

Accounts of Materials Research, Journal Year: 2024, Volume and Issue: 5(2), P. 184 - 193

Published: Jan. 25, 2024

ConspectusWith the rapid development of advanced energy storage equipment, particularly lithium-ion batteries (LIBs), there is a growing demand for enhanced battery density across various fields. Consequently, an increasing number high-specific-capacity cathode and anode materials are being rapidly developed. Concurrently, challenges pertaining to insufficient safety stability arising from liquid electrolytes (LEs) with flammability persistently emerge. LEs possess advantages exceptional ionic conductivity can operate within broader temperature range. After two decades continuous in commercial applications, it currently stands as most widely employed electrolyte material batteries. However, existing LE primarily consists carbonate low flash point, boiling flammable volatile nature, thereby rendering fire explosion risks inevitable. Compared LEs, solid-state (SSEs) exhibit relatively good flame retardancy potential inhibit lithium dendrite formation, they regarded promising materials. Nevertheless, numerous SSEs still need be addressed at this stage. The inadequate solid–solid contact between solid electrode material, well stability, significantly impact cycling Furthermore, unlike electrolytes, lacks fluidity cannot effectively penetrate pores porous electrodes, necessitating additional design considerations. incompatibility production processes high cost further impede advancement In response associated batteries, recent research has introduced situ solidification solutions. By transformation into battery, method facilitates excellent interfacial while ensuring compatibility equipment. these have propelled become prominent methodology Currently, undergoing transitional period solid-state, accompanying emergence hybrid solid–liquid (HSLEs). HSLEs not only characteristic but also enhance certain extent. found forms, including systems comprising inorganic gel consisting polymer LEs. Additionally, technologies that enable formed internally battery. This concept introduces status improved perspectives SSEs, HSLEs.

Language: Английский

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Key Anodic Interfacial Phenomena and their Control in Next‐Generation Lithium and Sodium Metal Batteries

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 9, 2025

Abstract Advancing next‐generation battery technologies requires a thorough understanding of the intricate phenomena occurring at anodic interfaces. This focused review explores key interfacial processes, examining their thermodynamics and consequences in ion transport charge transfer kinetics. It begins with discussion on formation electro chemical double layer, based GuoyChapman model, how carriers achieve equilibrium interface. then delves into essential including metal nucleation growth, development stability solid electrolyte interphase (SEI), movement across In addition, it analyzes impact different solutions—such as low‐ high‐concentration electrolytes localized electrolytes—on these processes. The role additives, co‐solvents, diluents modifying interfaces is also covered. further evaluates techniques for characterizing SEI highlighting strengths limitations both aqueous nonaqueous systems. By comparing challenges opportunities associated systems, this aims to offer new insights respective advantages limitations, ultimately guiding design optimization enhance safety efficiency future energy storage technologies.

Language: Английский

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Electrolyte engineering and interphase chemistry toward high-performance nickel-rich cathodes: Progress and perspectives

Materials Reports Energy, Journal Year: 2025, Volume and Issue: unknown, P. 100317 - 100317

Published: Jan. 1, 2025

Language: Английский

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