Molecule Crowding Strategy in Polymer Electrolytes Inducing Stable Interfaces for All‐Solid‐State Lithium Batteries

Advanced Materials, Год журнала: 2024, Номер 36(31)

Опубликована: Июнь 5, 2024

All-solid-state lithium batteries with polymer electrolytes suffer from electrolyte decomposition and dendrites because of the unstable electrode/electrolyte interfaces. Herein, a molecule crowding strategy is proposed to modulate Li

Язык: Английский

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A Supercapacitor Driven by MXene Nanofluid Gel Electrolyte Induced the Synergistic High Ionic Migration Rate and Excellent Mechanical Properties

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 6, 2024

Abstract The current application of gel electrolytes in energy storage fails to meet the demand for higher ion transport and excellent mechanical properties due low ionic conductivity poor properties. Herein, a novel strategy is proposed graft oligomer polyetheramine on surface MXene achieve transformation from solid nanofluid avoiding oxidation aggregation MXene, then it introduced providing channels synergistic effect core canopy produce Lewis acid–base interactions electrolyte ions, which not only promote dissociation but also provides path‐way. experiment molecular dynamics simulations show that diffusion ability ions enhanced, because reduce electrostatic interference between anions cations. specific capacity assembled supercapacitor 114.28 F g −1 at 1 A density, retention rate 91.30% after 3000 cycles. This work new insight fabricating high‐performance devices.

Язык: Английский

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Tailoring Multiple Interactions in Poly (Urethane‐Urea)‐Based Solid‐State Polymer Electrolytes for Long‐Term Cycling Lithium Metal Batteries

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 10, 2025

Abstract Polyethylene oxide (PEO)‐based solid polymer electrolytes (SPEs) are considered as one of the most promising candidates for next‐generation lithium metal batteries. However, their application is limited by poor electrode/electrolyte interfacial stability, low Li‐ions transference number, and weak mechanical strength. Herein, poly (urethane‐urea)‐based SPEs developed to enhance improve transport kinetics, provide superior properties. The (urethane‐urea) structure integrates abundant polar groups rigid conjugated moieties, which facilitate interactions with anions salt in SPEs, promoting number supporting formation a LiF‐rich electrolyte interphase (SEI) guide uniform deposition suppress dendrite growth. Furthermore, supramolecular crosslinked network formed through multiple hydrogen bonds π‐π stacking interactions, enhancing strength toughness SPEs. As result, Li//Li solid‐state symmetric cells assembled this SPE demonstrate stable cycling over 3000 h, while LiFePO 4 retain 93.6% initial capacity after 500 cycles at rate 1C. This work presents feasible design strategy developing highly functional materials.

Язык: Английский

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Bioinspired gel polymer electrolyte for wide temperature lithium metal battery

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Март 12, 2025

Stable operation of Li metal batteries with gel polymer electrolytes in a wide temperature range is highly expected. However, insufficient dynamics ion transport and unstable electrolyte-electrode interfaces at extreme temperatures greatly hinder their practical applications. We report bioinspired electrolyte that enables high-energy-density to work stably from –30 80 °C. The wide-temperature fabricated by using branched which side chains are double coupled asymmetric analogues. dipole coupling regulates the Li+ coordination environment form weak solvation structure offers fast uniform deposition temperatures. Consequently, non-flammable displays an ionic conductivity 1.03 × 10–4 S cm−1 –40 °C transference number 0.83. LiNi0.8Co0.1Mn0.1O2 positive electrode deliver initial specific discharge capacities 121.4 mAh g–1 172.2 °C, corresponding currents 18.8 mA 188 g–1, respectively. Additionally, pouch cell delivers energy up 490.8 Wh kg−1. Lithium-metal struggle environments, restricting Here, authors employs structure, enabling stable lithium-metal −30

Язык: Английский

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Elastic Polymer Electrolytes Integrated with In Situ Polymerization-Transferred Electrodes toward Stretchable Batteries

ACS Energy Letters, Год журнала: 2024, Номер 9(8), С. 3672 - 3682

Опубликована: Июль 17, 2024

Stretchable Li-ion batteries (LIBs) are important potential power sources for flexible electronics. Here, we propose an integrated in situ polymerization-transfer strategy to construct intrinsically stretchable LIBs (is-LIBs). Specifically, a polymer electrolyte (PE) with chain-liquid synergistic effect by poly(ethylene glycol methyl ether acrylate)-ionic liquid/lithium salt has been developed, which facilitates rapid Li+ transport (10–4 S cm–1) and promotes mechanical flexibility (stretching over 5000%) due the unique phase-separated structure of PE ionic–bipolar interactions between C=O-rich imidazolium cations. Additionally, Ag nanowires (AgNWs)/electrode materials transferred PDMS electrodes. The strong physical interaction AgNWs/electrode endows electrodes high strain 100% low sheet resistance 0.9 Ω □–1. Finally, is-LIB is achieved integration, showing good cycle rate performance. results suggest new avenue development energy storage devices.

Язык: Английский

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3D hierarchical porous hydrogel polymer electrolytes for flexible quasi-solid-state supercapacitors

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161766 - 161766

Опубликована: Март 1, 2025

Язык: Английский

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Molecular Crowding Solid Polymer Electrolytes for Lithium Metal Battery by In Situ Polymerization

Advanced Energy Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 13, 2024

Abstract Solid‐state polymer electrolytes (SPEs) require high ionic conductivity and dense contact with the electrodes for high‐performance lithium‐metal solid‐state batteries. However, massive challenges such as poor migration ability, low antioxidant lithium dendrite formation still remain unresolved. These issues severely restrict its practical applications. Herein, a new type of electrolyte molecular crowding feature is rationally designed by in situ polymerization precursor containing poly (ethylene glycol) diacrylate (PEGDA) 1,2‐dimethoxyethane (DME). Noticeably, prepared SPE expands electrochemical window to 4.7 V lithium‐ion transfer number 0.55 superior 3.6 mS cm −1 at room temperature. As result, symmetrical batteries achieve stable cycles more than 3000 h no dendrites current density 0.5 mA −2 . Importantly, this design provides porous cathode anode, allowing assembled winding‐type pouch cells outstanding cycling stability 81.7% retention 340 It shows excellent adaption widely technology large‐scale battery production, offering solution future development

Язык: Английский

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TpDa-Li COFs-based solid-state electrolyte for all solid lithium metal batteries

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 73, С. 443 - 450

Опубликована: Июнь 10, 2024

Язык: Английский

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3D printing zwitter Molecule‐Enhanced Solid Polymer Electrolytes for High‐Energy Lithium Metal Batteries

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 19, 2025

Abstract Unsatisfying preparation controllability, mechanical properties, ionic conductivities, and working voltage windows limit the practical applications of solid polymer electrolytes (SPEs) in lithium‐metal batteries. Herein, a 3D printing strategy combined with zwitter molecule modification is proposed to efficiently solve problems SPEs polyvinylidene fluoride‐hexafluoropropylene (PH) matrix. The electron‐donating property resulting from carboxyl groups aspartate acid (Asp) induces cis‐conformation change fluoride, which enhances Li + transport anion immobilization on chains. In addition, amphoteric functional Asp simultaneously promote lithium salt dissociation desolvation N,N‐dimethylformamide, thus leading formation stable 3 N/LiF‐enriched interphases between electrodes electrolyte. Moreover, technology increases continuity uniformity SPE membrane, further increasing conductivity properties. As result, exhibits high (1.20 × 10 −4 S cm −1 ), large transfer number (0.68), wide electrochemical window (4.6 V), good tensile strength (≈110 MPa), endowing half cells cycling performance over 2000 h low overpotential 40 mV. Furthermore, high‐energy densities (492 Wh kg 1303 L ) are delivered by pouch cell SPE, indicating application prospects.

Язык: Английский

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Enhanced Interfacial Contact and Lithium-Ion Transport in Ionic Liquid Polymer Electrolyte via In-Situ Electrolyte-Cathode Integration

Molecules, Год журнала: 2025, Номер 30(2), С. 395 - 395

Опубликована: Янв. 18, 2025

Solid polymer electrolytes (SPEs) have attracted much attention due to their excellent flexibility, strong interfacial adhesion, and good processibility. However, the poor contact between separate solid electrodes leads large impedance and, thus, hinders Li transport. In this work, an ionic liquid-modified comb-like crosslinked network composite solid-state electrolyte with integrated electrolyte/cathode structure is prepared by in situ ultraviolet (UV) photopolymerization. Combining enhanced introduction of liquid, a continuous fast Li+ transport channel at electrolyte–cathode interface established, ultimately enhancing overall performance lithium batteries. The (CSEs) exhibit conductivity 0.44 mS cm−1 60 °C. LiFePO4//Li cells deliver high discharge capacity (154 mAh g−1 0.5 C) cycling stability (with retention rate more than 80% C after 200 cycles)

Язык: Английский

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