In Situ Coordinated MOF‐Polymer Composite Electrolyte for Solid‐State Lithium Metal Batteries with Exceptional High‐Rate Performance

Small, Год журнала: 2025, Номер unknown

Опубликована: Фев. 5, 2025

Abstract The integration of metal organic frameworks (MOFs) and electrospun polymer fibers offers the potential to achieve uniform dispersion high loading fillers, providing a unique perspective for advancing composite solid electrolytes in solid‐state lithium batteries. In this work, electrolyte is fabricated through combination electrospinning chemical immersion, facilitating situ nucleation growth HKUST‐1 on polyacrylonitrile (PAN) nanofibers. coordinated particles not only modify solvation structure Li + coordination environment TFSI − , but also encapsulate PAN mitigate interfacial side reactions with metal, thereby improving stability. Consequently, achieves ion transference number 0.77 an impressive critical current density 4.5 mA cm −2 . assembled Li||Li symmetric cell exhibits stable operation over 4000 h at 4.0 while Li||LFP Li||NCM811 cells demonstrate exceptional rate capability cycling This work provides valuable insights into design fabrication MOF/polymer‐based electrolytes.

Язык: Английский

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Simultaneous Structure, Thermal, and Mechanics Regulation for Boosting Performance of PVDF-Based Solid-State Electrolytes

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер 17(9), С. 14058 - 14072

Опубликована: Фев. 18, 2025

Poly(vinylidene fluoride) (PVDF) is promising for polymer solid-state electrolytes (PSEs) but faces challenges such as low ionic conductivity, uneven strain distribution, and poor lithium (Li) dendrite inhibition. Herein, an effective strategy proposed to enhance PVDF-based PSEs by incorporating a fast ion conductor LiZr2(PO4)3 (LZP) with negative thermal expansion property NASICON-type structure, the effects are investigated using multifarious methods. The added LZP not only enhances mobility of PVDF chain concentration free Li+, regulates heat release volume during cycles, thereby protecting electrode morphology well improving interface between electrolyte. Compared pristine PSEs, conductivity increased 3.3 × 10-4 S cm-1, stability augmented adding 10 wt % LZP. At 25 °C 0.5 C, values discharge capacity retention Li|PVDF-10 %LZP|LiFePO4 %LZP|LiNi0.8Co0.1Mn0.1O2 full cells without liquid improved from 61.4 53.4% 90.4 87.7% after 300 200 respectively. enhancement mechanisms based on interactions heat, deformation, interface, transfer. It paves unique way develop simultaneously adjusting mechanics.

Язык: Английский

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In situ Triggered Rich‐LiF/Mg Multifunctional Passivation Layer for Modifying the Anode Interface of All‐Solid‐State Lithium Metal Batteries

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 10, 2024

Abstract Lithium (Li) is a promising anode material for all‐solid‐state Li metal batteries (ASSLMBs) due to its high energy density. However, the interface incompatibility of Li/solid electrolyte and uneven deposition induces penetration dendrites. Herein, multifunctional rich‐LiF/Mg artificial solid interphase (SEI) layer constructed from MgF 2 ‐PVDF‐HFP film passivate achieve effective inhibition Notably, triggered x Mg alloys rivet 6 PS 5 Cl (LPSCl) together well, producing satisfactory contact reducing overpotential. The mechanism LiF enhance stability Li/LPSCl further elucidated by density functional theory (DFT). Moreover, synergistic interaction with interfacial low diffusion barrier promotes uniform during plating/stripping structural stability. Therefore, modified Li‐symmetric cell exhibits ultra‐high critical current (2.0 mA cm −2 ) considerable cyclic (more than 1000 h at 0.5 ). Remarkably, NCM//LPSCl//3% ‐PVDF‐HFP@Li ASSLMBs exhibit long‐term cycle (86.9% capacity retention after 100 cycles 0.2 C). This work highlights role intermediate passivating in mitigating side reactions preventing penetration.

Язык: Английский

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Improving the Ionic Conductivity and Anode Interface Compatibility of LLZO/PVDF Composite Polymer Electrolytes by Compositional Tuning

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(24), С. 31648 - 31656

Опубликована: Июнь 5, 2024

Utilizing aluminum-doped nano LLZO (Li6.28La3Zr2Al0.24O12) as the ceramic filler, we synthesized and optimized LLZO/PVDF/LiClO4 composite polymer electrolytes (CPEs) to achieve high ionic conductivity good interfacial stability with metallic lithium. The research examines how PVDF grade mass ratio of LiClO4 affect conductivity, lithium metal compatibility, overall performance CPEs. CPE using Kynar 741 a PVDF-to-LiClO4 2:1 emerged superior, displaying at room temperature (0.12 mS/cm), lowest activation energy (0.247 eV), an extensive electrochemical window (approximately 4.9 V), robust mechanical strength. In tests symmetric cells, membrane facilitated over 1000 h stable cycling 0.1 mA cm–2 mAh cm–2. Furthermore, when integrated into full solid-state lithium–metal batteries LiFePO4 cathodes, it sustained more than 80% capacity retention across 500 charge/discharge cycles rate 0.5 C constantly Coulombic efficiencies above 99.8%, underscoring its exceptional durability efficiency. This provides practical framework benchmarks for developing LLZO/PVDF-based CPEs enhanced against metals.

Язык: Английский

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Surficial Regulation of LLZO for High Performance Composite Solid Electrolyte

ACS Applied Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 2, 2025

Язык: Английский

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Recent Advances for Cation‐Anion Aggregates in Solid Polymer Electrolytes: Mechanism, Strategies, and Applications

Small Methods, Год журнала: 2025, Номер unknown

Опубликована: Март 13, 2025

Abstract Solid polymer electrolytes (SPEs) have garnered significant attention from both academic and industrial communities due to their high safety feature energy density in combination with lithium(Li) metal anode. Nevertheless, practical applications remain constrained by the relatively low room‐temperature ionic conductivity interface issues. Anion‐derived cation‐anion aggregates (AGGs), derived high‐concentration liquid electrolytes, promote a stable solid‐electrolyte interphase layer, which gradually propelled application SPEs. Meanwhile, unique ion transport mechanism of AGGs SPEs also helps enhance conductivity. However, detail progress poorly understood. Here, it is begin concise historical review on development configuration, followed discussion fundamental mechanisms AGGs‐based Then, focused recent developments, design strategies for are summarized detail. Finally, perspectives provided future developments challenges high‐performance

Язык: Английский

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Trapping Anions to Govern the Li⁺ Local Coordination Environment for a Highly Li⁺ Conductive Solid Polymer Electrolyte

ACS Applied Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 24, 2025

Язык: Английский

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Methacrylated Wood Flour-Reinforced Gelatin-Based Gel Polymer as Green Electrolytes for Li–O₂ Batteries

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(33), С. 44033 - 44043

Опубликована: Авг. 6, 2024

With its very high theoretical energy density, the Li–O2 battery could be considered a valid candidate for future advanced storage solutions. However, challenges hindering practical application of this technology are many, as example electrolyte degradation under action superoxide radicals produced upon cycling. In that frame, gel polymer was developed starting from waste-derived components: gelatin cold water fish skin, waste fishing industry, and wood flour industry. Both were methacrylated then easily cross-linked through one-pot ultraviolet (UV)-initiated free radical polymerization, directly in presence liquid (0.5 M LiTFSI DMSO). The works cross-linking points, reinforcing mechanical properties obtained electrolyte, but it also increases Li-ion transport with an ionic conductivity 3.3 mS cm–1 transference number 0.65 at room temperature. cells assembled green able to perform 180 cycles 0.1 mA cm–2, fixed capacity 0.2 mAh constant O2 flow. Cathodes post-mortem analysis confirmed slow down solvent degradation, revealed higher reversibility explained by formation Li2O2 amorphous phase compared purely gelatin-based electrolyte.

Язык: Английский

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In-situ crafted fast Li-ion transport networks in composite quasi-solid-state electrolytes from electrospun hybrid polymer nanofibers

Chemical Engineering Journal, Год журнала: 2024, Номер 503, С. 158474 - 158474

Опубликована: Дек. 10, 2024

Язык: Английский

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Loosening the Solvation Cage in Polysaccharide Polymer Electrolyte for Sustainable Lithium Metal Batteries

Small, Год журнала: 2024, Номер unknown

Опубликована: Дек. 18, 2024

Biomass with naturally ion-conducting segments (e.g., hydroxyl) holds promise for sustainable batteries. Several expeditions are proposed to successfully enhance the ion conduction in biomass polymer mainly by intermolecular structure regulation. Presently, recognition and research of electrolytes still limited, requiring continuous explorations promote application such promising electrolytes. Herein, a molecularly asymmetric electrolyte is produced, comprising polysaccharides starch chitosan. The strong Li

Язык: Английский

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