Sole‐Solvent High‐Entropy Electrolyte Realizes Wide‐Temperature and High‐Voltage Practical Anode‐Free Sodium Pouch Cells

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

Published: Jan. 21, 2025

Abstract Anode‐free sodium batteries (AFSBs) hold great promise for high‐density energy storage. However, high‐voltage AFSBs, especially those can stably cycle at a wide temperature range are challenging due to the poor electrolyte compatibility toward both cathode and anode. Herein, AFSBs with cycling ability in (−20–60 °C) realized first time via sole‐solvent high‐entropy based on diethylene glycol dibutyl ether solvent (D2) NaPF 6 salt. The unique solvent‐ions effect of strong anion interaction weak cation solvation enables entropy‐driven salt disassociation high‐concentration contact ion pairs, thus simultaneously forming stable anion‐derived electrode–electrolyte interphases Moreover, liquid D2 further extends extremes battery. Consequently, ampere‐hour (Ah)‐level anode‐free pouch cells cyclability −20–60 °C realized. Impressively, cell achieves leadingly high cell‐level density 209 Wh kg −1 capacity retention 83.1% after 100 cycles 25 °C. This work provides inspirations designing advanced electrolytes practical AFSBs.

Language: Английский

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Approaching industry-adaptable silicon-based anodes via fundamental mechanism understanding

Materials Science and Engineering R Reports, Journal Year: 2025, Volume and Issue: 164, P. 100954 - 100954

Published: Feb. 24, 2025

Language: Английский

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Improving upon rechargeable battery technologies: On the role of high-entropy effects

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

An overview of high-entropy strategies for batteries is provided, emphasizing their unique structural/compositional attributes and positive effects on stability performance, alongside a discussion key challenges future research directions.

Language: Английский

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Local lattice distortion regulation in high entropy engineering to enhance the triple conductivity of layered Ruddlesden-Popper perovskite cathode in H+-SOFCs

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 159463 - 159463

Published: Jan. 1, 2025

Language: Английский

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Impact of Spatial Interactions in Polycarbonate-Based Electrolytes on Ion Transport Dynamics and Battery Performance

The Journal of Physical Chemistry Letters, Journal Year: 2025, Volume and Issue: unknown, P. 2856 - 2866

Published: March 10, 2025

Polymer electrolytes (PEs) show great promise in next-generation solid-state batteries. The interactions between functional monomers and lithium salts PEs remain ambiguous, constraining the material design strategy aimed at optimizing electrochemical performance. Here, we report on local spatial among components polycarbonate-based electrolytes, as determined through nuclear magnetic resonance (NMR) techniques. We used molecular dynamics simulations to rationalize distribution of ions its effect coordination anions cations. cations were further revealed from an ion perspective using variable temperature NMR techniques, shedding light how mobility is affected by different interactions. Finally, clearly delineate battery performances are Our findings provide direct experimental evidence, revealing affect diffusion level. Overall, this work provides valuable guidance for mechanistic understanding PEs.

Language: Английский

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Entropy-based unified theory of failure threshold of degrading systems

Newton, Journal Year: 2025, Volume and Issue: unknown, P. 100035 - 100035

Published: March 1, 2025

Language: Английский

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A Bipartite Synergistic Strategy for All‐Weather Sodium‐Ion Fiber Supercapacitor with Excellent Energy Density and Temperature Adaptability

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

Published: April 1, 2025

Abstract Sodium‐ion fiber supercapacitor (AFSIC) are promising candidates for wearable devices. However, their practical implementation is hindered by the absence of cathodes with fast Na‐ion diffusion kinetics to match anode and poor temperature adaptability conventional electrolytes. To address these challenges, a carbon‐coated NaV 3 O 8 nanowires (NaNVO@C 10 ) low energy barriers designed, enabling rapid reversible intercalation/de‐intercalation. By leveraging liquid crystalline phase induced characteristic graphene oxide (GO), NaNVO@C /rGO cathode fabricated using wet spinning. This achieves large volume capacitive 565 F cm −3 . In parallel, novel dual co‐solvent electrolyte (SLPHNa) developed introducing sulfolane ethylphosphate as co‐solvent. synergistically reshape solvation sheath, thereby improving cycle stability enhancing from −60 80 °C AFSIC. The resulting /rGO//MXene AFSIC exhibits remarkable density 35 mWh , maintains 9.3 even at °C, along an ultra‐long lifespan 000 cycles under all‐weather condition. Moreover, device 82% its initial capacitance after 1000 bending cycles, showing excellent mechanical durability. work offers new insights into development high performance sodium‐ion supercapacitors.

Language: Английский

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Temperature-Robust Solvation Enabled by Solvent Interactions for Low-Temperature Sodium Metal Batteries

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 28, 2025

The broad temperature adaptability associated with the desolvation process remains a formidable challenge for organic electrolytes in rechargeable metal batteries, especially under low-temperature (LT) conditions. Although traditional approach involves utilizing high degree of anion participation solvation structure, known as weakly (WSEs), structure these is highly susceptible to fluctuations, potentially undermining their LT performance. To address this limitation, we have devised an innovative electrolyte that harnesses interplay between solvent molecules, effectively blending strong and weak solvents while incorporating mostly unchanged by variations. Remarkably, competitive coordination two molecules introduces local disorder, which not only boosts ionic conductivity but also prevents salt precipitation solidification. Therefore, has 3.12 mS cm-1 at -40 °C. Na3V2(PO4)3||Na cells demonstrated reversible capacity 95.9 mAh g-1 °C, 87.6% room temperature, well stable cycling 3400 cycles retention 98.2% -20 °C 5 C 600 96.1% 1 C. This study provides new perspective on designing regulating temperature-robust structures.

Language: Английский

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Decoding the Entropy‐Performance Relationship in Aqueous Electrolytes for Lithium‐Ion Batteries

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

Published: April 17, 2025

Abstract Developing aqueous low‐temperature electrolytes aligns with the societal demand for lithium batteries in extreme climates and environments. However, main challenges include high thermodynamic freezing points, slow ion diffusion, instability at interface under low temperatures, resulting energy density poor cycle performance. Here, role of mixing entropy ΔS mix , hydrogen bonding, electrostatic interactions achieving an optimal electrolyte composition is explored. By systematically varying ethyl acetate (EA)/H 2 O ratio, a critical “mixing point” molar ratio 3.91, where exhibits best balance between molecular disorder interfacial stability identified. At this point, EA molecules polar ester group (‐COO‐) effectively break hydrogen‐bond network water, enhancing lowering point to −106.95 °C. Furthermore, stable chemistry derived from entropy‐driven solvation structure suppress evolution expand electrochemical window 6.2 V. Full Li‐ion LiMn 4 ‐Li Ti 5 12 full cell delivered initial discharge specific capacity 135.1 mAh g −1 1000 cycles rapid 10 C rate. The results provide promising foundation designing high‐performance electrolytes, implications next‐generation lithium‐ion batteries.

Language: Английский

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Metal Ion Catalysis within Hard Carbon Synthesis and Electrode Interface Engineering for Sodium‐Ion Batteries

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

Published: May 5, 2025

Abstract Metallic residues in biomass‐derived hard carbons (HCs) are conventionally considered detrimental to Na + ions storage, recent breakthroughs reveal that controlled metal‐ion doping can substantially enhance electrochemical performance. Suitable metal is beneficial its overall Consequently, manipulating the microstructure of HCs at molecular level achieve adaptive with ions, thereby fostering smoother diffusion environments and increasing storage sites for crucial achieving exceptional sodium‐ion batteries (SIBs) This review delves into commercialization potential SIBs provides a comprehensive summary development trajectory ion‐catalyzed hydrocarbons (MICHCs), which encompasses synthesis methodologies, intricate relationship between position/content performance, underlying reaction mechanisms. Regarding catalytic mechanism this outlines interaction HCs, offering theoretical foundations practical guidance developing high‐performance sodium materials. By regulating content type one adjust physicochemical properties local improve MICHCs. Research on MICHCs not only advances related disciplines but also fosters technological innovation industrial upgrading. discusses future developments challenges facing key technologies burgeoning field.

Language: Английский

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