Dendrite‐Free Li Metal Anode Achieved by Bi‐Functional Host of NH₂‐Modified UiO‐66 on Zn‐Embedded Porous Carbon Nanofibers

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 11, 2025

Abstract 3D carbonaceous host is considered as an ideal candidate for stabilizing Li metal anode (LMA) owing to its lightweight and high electronic conductivity. Nonetheless, the surface chemistries of carbon materials at different locations should be regulated modify lithiophilicity ion diffusion. In this study, a metal–organic frameworks‐engaged strategy design core–shell porous with mixed ionic/electronic conducting feature developed. To specific, Zn‐embedded nanofibers (Zn/CF) are designed cores using ZIF‐8 particles precursors pore‐forming agents. Meanwhile, NH 2 ‐functionalized UiO‐66 (NH ‐UiO‐66) nanoparticles in‐situ grown on above fibers promoted ions migration. As result, composite LMA bi‐functional Zn/CF@NH ‐UiO‐66 demonstrates enhanced stability rate performance. Particularly, obtained asymmetric cell delivers stable operation up 500 cycles 1 mA cm −2 . Moreover, corresponding Li‐Zn/CF@NH ‐UiO‐66//LiFePO 4 full shows high‐capacity retention 93.4% over 1700 C (1 ≈169 g −1 ).

Язык: Английский

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Constructing PVDF‐Based Polymer Electrolyte for Lithium Metal Batteries by Polymer‐Induced Phase Structure Adjustment Strategy

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 18, 2025

Abstract The phase separation between solvents and polymers during the processing leads to porous structure of PVDF electrolyte, resulting in uneven distribution ion channels, accelerating growth lithium dendrites. Moreover, various crystal structures hinder migration Li + , setting obstacles for improvement conductivity. Here, an amorphous polymer system (BPE) with excellent salt affinity is introduced into electrolyte as a bridge eliminate structures. densified by utilizing properties BPE its salt, thus homogenizing channels. Furthermore, inhibited crystallization PVDF, improving conductivity electrolyte. obtained (BPLE) has high ionic (1.6 × 10 −3 S cm −1 ) transference number (0.66) at room temperature. LiFePO 4 ||Li cell assembled BPLE‐1 achieved initial capacity 149 mAh g retention rate 98% (1C, 500 cycles, RT). At current density 2C, battery specific 142 exceeds 84% after 800 cycles.

Язык: Английский

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Construction of ZIF-8 modified laponite to enable polyvinylidene fluoride-based solid-state electrolyte with high lithium flux

Journal of Colloid and Interface Science, Год журнала: 2025, Номер unknown

Опубликована: Март 1, 2025

Язык: Английский

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Metal-Organic Framework/Polymer Composites for Solid State Electrolytes-A Critical Review

Journal of Power Sources, Год журнала: 2025, Номер 640, С. 236720 - 236720

Опубликована: Март 7, 2025

Язык: Английский

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Innovative zwitterionic polymers in advanced batteries

Energy storage materials, Год журнала: 2025, Номер unknown, С. 104253 - 104253

Опубликована: Апрель 1, 2025

Язык: Английский

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Defect-Tailoring Metal–Organic Frameworks for Highly Fast-Charging Quasi-Solid-State Electrolytes Lithium Metal Batteries

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Апрель 15, 2025

Metal-organic frameworks (MOFs) show revolutionary potential in quasi-solid-state electrolytes (QSSEs) designed for high-energy-density batteries, owing to their tunable nanoporous structures and open metal sites (OMSs). However, application is hindered by insufficient Li+ dissociation low ionic conductivity, attributed limited active sites. This study employed defect engineering modulate hafnium-based MOFs, increasing OMS density while optimizing the pore microenvironment. The engineered defects improve Lewis acid strength of OMSs, driving lithium salt establishing strong chemisorption TFSI- anions. By synergistically density, acidity, structural stability, defect-engineered Hf-MOF-QSSE achieved an conductivity 1.0 mS cm-1 at 30 °C delivered a critical current 2 mA cm-2, surpassing previously reported MOF-QSSEs, underscoring pivotal role electrolyte optimization. Furthermore, Li||LiFePO4 cells exhibited excellent cycling stability ultrahigh rate capability, retaining 93% capacity after 1500 cycles 10C, Li||NCM811 maintained specific 85 mAh g-1 600 5C.

Язык: Английский

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Amide Induced Fast‐Ion Transport in Bulk Phases and Interfaces for Polymer‐In‐Ceramic Electrolytes

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 21, 2025

Abstract Polymer in ceramic (PIC) electrolytes have garnered significant attention due to their advantages over individual inorganic and organic polymer electrolytes. However, the slow movement of Li + on chain segments “hard contact” among particles with irregular surface severely impede smooth transport lithium ions. The bipolar character N‐methyl‐2,2,2‐trifluoroacetamide (MFA) makes it significantly enriched surface, accordingly converting between into a “soft mode, opening up ion multiple phases. structure fluorine substitution further disperses negative charge density carbonyl group from MFA accelerates ligand removal . Accordingly, interconnected PIC electrolyte (MPIC) exhibits an ionic conductivity 1.13 mS cm −1 transfer number 0.81 at 30 °C, also delivering remarkable critical current 2.6 mA −2 corresponding full cell can achieve stable cycling high 1.2 even −20 still retains 94% its capacity after 100 cycles, overcoming temperature limitations. This work paves way for designing commercial viability by interphase regulation.

Язык: Английский

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Flexible lithium-ion batteries: innovations in polymer electrolyte synthesis and structural engineering

Materials Today Energy, Год журнала: 2025, Номер unknown, С. 101902 - 101902

Опубликована: Апрель 1, 2025

Язык: Английский

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Machine-Learning-Guided Screening of Advantageous Solvents for Solid Polymer Electrolytes in Lithium Metal Batteries

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Май 2, 2025

Trace residual solvents in solid polymer electrolytes (SPEs) significantly affect electrolyte and interface properties, where optimal selection enhances the ionic conductivity transference numbers. However, solvent complexity hinders general screening methods. We establish a universal criterion linking electronic (highest occupied molecular orbital (HOMO), lowest unoccupied (LUMO)) macroscopic properties (dielectric constant, dipole moment, polarizability) via machine learning on an ∼10 000-solvent dataset from high-throughput density functional theory (DFT). Two solvents, N-methoxy-N-methyl-2,2,2-trifluoroacetamide 2,2,2-trifluoro-N,N-dimethylacetamide were identified. Experimental incorporation of trace into poly(vinylidene fluoride-co-hexafluoropropylene) matrix achieves 4.5 V window, 5.5 × 10-4 S cm-1 (30 °C), Li+ number 0.78. The cell retains 86.7% capacity over 500 cycles (LiFePO4) 98.7% after 200 at 2C (LiNi0.9Co0.05Mn0.05O2), outperforming 2,2,2-trifluoro-N,N-dimethylacetamide, dimethylformamide, N-methyl-2-pyrrolidone, dimethyl sulfoxide. This synergy enables balanced ion transport, wide stability, cycling durability, advancing safer high-energy lithium metal batteries. Our integrated approach establishes paradigm for rational SPE design, accelerating next-generation battery development.

Язык: Английский

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Indium-MOF as Multifunctional Promoter to Remove Ionic Conductivity and Electrochemical Stability Constraints on Fluoropolymer Electrolytes for All-Solid-State Lithium Metal Battery

Nano-Micro Letters, Год журнала: 2025, Номер 17(1)

Опубликована: Май 7, 2025

Abstract Fluoropolymers promise all-solid-state lithium metal batteries (ASLMBs) but suffer from two critical challenges. The first is the trade-off between ionic conductivity ( σ ) and anode reactions, closely related to high-content residual solvents. second, usually consciously overlooked, fluoropolymer’s inherent instability against alkaline anodes. Here, we propose indium-based metal–organic frameworks (In-MOFs) as a multifunctional promoter simultaneously address these challenges, using poly(vinylidene fluoride–hexafluoropropylene) (PVH) typical fluoropolymer. In-MOF plays trio: (1) adsorbing converting free solvents into bonded states prevent their side reactions with anodes while retaining advantages on Li + transport; (2) forming inorganic-rich solid electrolyte interphase layers PVH reacting promote uniform deposition without dendrite growth; (3) reducing crystallinity promoting Li-salt dissociation. Therefore, resulting PVH/In-MOF (PVH-IM) showcases excellent electrochemical stability anodes, delivering 5550 h cycling at 0.2 mA cm −2 remarkable cumulative capacity of 1110 mAh . It also exhibits an ultrahigh 1.23 × 10 −3 S −1 25 °C. Moreover, LiFePO 4 |PVH-IM|Li full cells show outstanding rate capability cyclability (80.0% retention after 280 cycles 0.5C), demonstrating high potential for practical ASLMBs.

Язык: Английский

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