Universal F4‐Modified Strategy on Metal–Organic Framework to Chemical Stabilize PVDF‐HFP as Quasi‐Solid‐State Electrolyte

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(52)

Published: Nov. 21, 2023

Solid-state electrolytes (SSEs) based on metal organic framework (MOF) and polymer mixed matrix membranes (MMMs) have shown great promotions in both lithium-ion conduction interfacial resistance lithium batteries (LMBs). However, the unwanted structural evolution obscure electrochemical reaction mechanism among two phases limit their further optimization commercial application. Herein, fluorine-modified zirconium MOF with diverse F-quantities is synthesized, denoted as Zr-BDC-Fx (x = 0, 2, 4), to assemble high performance quais-solid-state (QSSEs) PVDF-HFP. The chemical complexation of F-sites Zr-BDC-F4 stabilized PVDF-HFP chains β-phase disordered oscillation enhanced charge transfer Li transmit property. Besides, porous confinement electronegativity F-groups capture dissociation TFSI- anions homogeneous deposition LiF solid electrolyte interphase (SEI), promoting high-efficient transport Li+ ions inhibiting growth dendrites. superb specific capacities high-loaded Li.

Language: Английский

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Molecular Design for In‐Situ Polymerized Solid Polymer Electrolytes Enabling Stable Cycling of Lithium Metal Batteries

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(22)

Published: March 5, 2024

Abstract The practical application of polymer electrolytes is hindered due to the low ionic conductivity and interfacial instability between electrodes. Herein, a strategy for designing solid developed that facilitates rapid lithium‐ion migration through weak coordination with chain segments, as well fast ion channel transport oligomers. Moreover, in situ‐produced electrolyte (PFVS) can form stable LiF‐rich interfaces both lithium metal anode different cathodes. When PFVS applied Li‐metal batteries, excellent properties are achieved at room temperature. A Li||Li symmetric cell be stably cycled 4000 h current density 0.1 mA cm −1 , Li||LiFePO 4 full maintain capacity retention high still 94.4% after 600 cycles 1 C, Li||NCM811 retain 80% 180 C. 2.6 Ah Graphite|PFVS|NCM90 pouch made demonstrating potential, it also cycled. provides promising path effectively extend lifespan Li batteries.

Language: Английский

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Unique Tridentate Coordination Tailored Solvation Sheath Toward Highly Stable Lithium Metal Batteries

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(38)

Published: June 7, 2023

Electrolyte optimization by solvent molecule design is recognized as an effective approach for stabilizing lithium (Li) metal batteries. However, the coordination pattern of Li ions (Li+ ) with molecules sparsely considered. Here, electrolyte strategy reported based on bi/tridentate chelation Li+ and to tune solvation structure. As a proof concept, novel multi-oxygen sites demonstrated facilitate formation anion-aggregated shell, enhancing interfacial stability de-solvation kinetics. result, as-developed exhibits ultra-stable cycling over 1400 h in symmetric cells 50 µm-thin foils. When paired high-loading LiFePO4 , full maintain 92% capacity 500 cycles deliver improved electrochemical performances wide temperature range from -10 60 °C. Furthermore, concept validated pouch cell (570 mAh), achieving retention 99.5% after 100 cycles. This brand-new insight engineering provides guidelines practical high-performance

Language: Английский

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Mechanisms of the Accelerated Li⁺ Conduction in MOF‐Based Solid‐State Polymer Electrolytes for All‐Solid‐State Lithium Metal Batteries

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(32)

Published: April 5, 2024

Solid polymer electrolytes (SPEs) for lithium metal batteries have garnered considerable interests owing to their low cost, flexibility, lightweight, and favorable interfacial compatibility with battery electrodes. Their soft mechanical nature compared solid inorganic give them a large advantage be used in pressure solid-state batteries, which can avoid the cost weight of cages. However, application SPEs is hindered by relatively ionic conductivity. In addressing this limitation, enormous efforts are devoted experimental investigation theoretical calculations/simulation new classes. Recently, metal-organic frameworks (MOFs) been shown effective enhancing ion transport SPEs. mechanisms Li

Language: Английский

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Highly Efficient Aligned Ion-Conducting Network and Interface Chemistries for Depolarized All-Solid-State Lithium Metal Batteries

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 16(1)

Published: Jan. 12, 2024

Improving the long-term cycling stability and energy density of all-solid-state lithium (Li)-metal batteries (ASSLMBs) at room temperature is a severe challenge because notorious solid-solid interfacial contact loss sluggish ion transport. Solid electrolytes are generally studied as two-dimensional (2D) structures with planar interfaces, showing limited further resulting in unstable Li/electrolyte cathode/electrolyte interfaces. Herein, three-dimensional (3D) architecturally designed composite solid developed independently controlled structural factors using 3D printing processing post-curing treatment. Multiple-type electrolyte films vertical-aligned micro-pillar (p-3DSE) spiral (s-3DSE) rationally developed, which can be employed for both Li metal anode cathode terms accelerating

Language: Английский

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Inorganic-polymer composite electrolytes: basics, fabrications, challenges and future perspectives

Reviews in Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 44(3), P. 347 - 375

Published: Feb. 19, 2024

Abstract This review covers the basics of, inorganic-polymer composite electrolyte materials that combine inorganic components with polymer matrices to enhance ionic conductivity and mechanical properties of electrolyte. These electrolytes are commonly employed in solid-state batteries, fuel cells, supercapacitors, other electrochemical devices. The incorporation components, such as ceramic nanoparticles or metal oxides, into a matrix provides several advantages. can improve overall by providing pathways for ion transport, reducing tortuosity matrix, facilitating hopping between chains. Additionally, often exhibit higher thermal chemical stability compared pure polymers, which safety durability electrolytes. Polymer used vary, but common choices include polyethylene oxide (PEO), polyvinylidene fluoride (PVDF), polyacrylonitrile (PAN), oxide/polypropylene (PEO/PPO) blends. polymers offer good flexibility processability, allowing fabrication thin films membranes. methods depend on specific application desired properties. Common approaches solution casting, situ polymerization, melt blending, electrospinning. During process, typically dispersed mixed resulting is processed form, films, membranes, coatings. performance evaluated based their conductivity, strength, stability, compatibility electrode materials. Researchers continue explore various combinations well optimization strategies, further these advanced energy storage conversion applications.

Language: Английский

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Revealing and reconstructing the 3D Li-ion transportation network for superionic poly(ethylene) oxide conductor

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Aug. 8, 2024

Understanding the Li-ions conduction network and transport dynamics in polymer electrolyte is crucial for developing reliable all-solid-state batteries. In this work, advanced nano- X-ray computed tomography combined with Raman spectroscopy solid state nuclear magnetic resonance are used to multi-scale qualitatively quantitatively reveal ion of poly(ethylene) oxide (PEO)-based (from atomic, nano macroscopic level). With clear mapping microstructural heterogeneities segments, aluminium-oxo molecular clusters (AlOC) reconstruct a high-efficient conducting high available (76.7%) continuous amorphous domains via strong supramolecular interactions. Such superionic PEO conductor (PEO-LiTFSI-AlOC) exhibites molten-like Li-ion behaviour among whole temperature range delivers an ionic conductivity 1.87 × 10

Language: Английский

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Selectively fluorinated aromatic lithium salts regulate the solvation structure and interfacial chemistry for all-solid-state batteries

Science Advances, Journal Year: 2025, Volume and Issue: 11(5)

Published: Jan. 31, 2025

Solid polymer electrolytes suffer from the polymer-dominated Li + solvation structure, causing unstable electrolyte/electrode interphases and deteriorated battery performance. Here, we design a class of selectively fluorinated aromatic lithium salts (SFALS) as single conducting to regulate structure interfacial chemistry for all-solid-state metal batteries. By tuning anionic -polyether coupling is weakened, -anion coordination enhanced. The hydrogen bonding between SFALS matrix induces special “triad”-type which improves electrolyte homogeneity mechanical strength, promotes formation an ultrathin robust 2 O-rich solid interphase. Therefore, stable cycling more than 1650 cycles (Coulombic efficiency, 99.8%) LiFePO 4 /Li half cells 580 (97.4% capacity retention) full achieved. This molecular engineering strategy could inspire further advancements functional practical application

Language: Английский

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Nanofiber-Based Composite Solid Electrolytes for Solid-State Batteries: from Fundamentals to Applications

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

Published: Feb. 28, 2025

Language: Английский

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Coupling Anion‐Capturer with Polymer Chains in Fireproof Gel Polymer Electrolyte Enables Dendrite‐Free Sodium Metal Batteries

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(46)

Published: July 31, 2023

Abstract Sodium metal batteries (SMBs) using gel polymer electrolytes (GPEs) with high theoretical capacity and low production cost are regarded as a promising candidate for energy‐density batteries. However, the inherent flammability of GPEs uncontrolled Na dendrite caused by inferior mechanical properties interfacial stability hinder their practical applications. Herein, an anion‐trapping fireproof composite electrolyte (AT‐FCGE) is designed through chemical grafting–coupling strategy, where functionalized boron nitride nanosheets (M‐BNNs) used both nanosized crosslinker anion capturer coupled poly(ethylene glycol)diacrylate in poly(vinylidene fluoride‐co‐hexafluoropropylene) matrix, to expedite + transport suppress growth. Experimental calculation studies suggest that effect M‐BNNs abundant Lewis‐acid sites can promote dissociation salts, thus remarkably improving ionic conductivity transference number. Meanwhile, formation highly crosslinked semi‐interpenetrating network effectively situ encapsulate non‐flammable phosphate without sacrificing properties. Consequently, resulting AT‐FCGE shows significantly enhanced conductivity, properties, excellent stability. The enables long‐cycle dendrite‐free Na/Na symmetric cell, prominent electrochemical performance demonstrated solid‐state SMBs. approach provides broader promise great potential fire‐retardant high‐performance SMBs beyond.

Language: Английский

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