New Dissolution Chemistry of Nylon Promises Reversible Li-Metal Batteries

ACS Energy Letters, Journal Year: 2025, Volume and Issue: unknown, P. 1129 - 1138

Published: Feb. 9, 2025

Integrating additives into electrolytes serves as an effective strategy for cultivating robust interphases in batteries. Traditionally, the emphasis has been placed on small-molecule additives, whereas macromolecules have largely overlooked due to their insolubility conventional solvents. In this study, we establish that macromolecule polyamide (nylon, PA) can be effectively solubilized Li+ and utilized a macromolecular additive. The dissolution capability of electrolyte is governed by multiple parameters. Specifically, PA facilitated stronger Lewis acidity cations, weaker solvating capabilities solvents, smaller anions, higher salt concentrations. At molecular level, coordination cations with carbonyl groups formation H-bonds between anions amido disrupt crystalline structure PA, thereby enhancing its solubility. As paradigm practicability, carbonate-based induces Li3N-rich interphases, significantly boosting rechargeability Li-metal batteries (LMBs).

Language: Английский

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Progress and perspectives on electrocatalysis in room-temperature Na–S batteries

Chemical Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Room-temperature sodium–sulfur (RT Na–S) batteries can allow an ultrahigh specific capacity and a high energy density but unfortunately suffer from lot of intractable challenges sulfur cathodes.

Language: Английский

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Fluorine‐Free Cosolvent Chemistry Empowering Sodium‐Sulfurized Polyacrylonitrile Batteries

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

Published: March 4, 2025

Abstract Localized high‐concentration electrolytes (LHCE) show great promise for room‐temperature sodium‐sulfur batteries. However, the majority of diluents in LHCE systems consist fluorinated ethers, which are not only dense and expensive but also demonstrate poor reductive stability with sodium metal. Herein, a low‐density, non‐fluorinated ether electrolyte is presented that demonstrates localized behavior. This feature driven by weak solvating capabilities 1,2‐dimethoxypropane (DMP) ultra‐weak nature cyclopentyl methyl (CPME). Impressively, fluorine‐free CPME cosolvent acts as diluent within electrolyte. Therefore, achieves tailored solvation structure characterized anion‐rich species, fosters development resilient inorganic‐rich SEI superior Na‐ion transport. Consequently, high sulfur‐content sulfurized polyacrylonitrile (SPAN, S content > 45% SPAN) loading 4.4 mg cm⁻ 2 (sulfur loading: ) low electrolyte‐to‐SPAN ratio 9 µL mg⁻¹ (E/SPAN = 9), Na‐SPAN cell remarkable reversibility 530 mA h g sulfur ⁻¹ after 200 cycles at C/5 rate. performance surpasses state‐of‐the‐art ether‐based reported to date. Hence, this work presents novel approach designing cost‐effective, high‐performance stable, practical

Language: Английский

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A comprehensive investigation of solvation structure and cathode-electrolytes interface for sodium-sulfur batteries in high-concentration electrolytes

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: unknown, P. 137312 - 137312

Published: March 1, 2025

Language: Английский

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Inner–Outer Sheath Synergistic Shielding of Polysulfides in Asymmetric Solvent-Based Electrolytes for Stable Sodium–Sulfur Batteries

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

Published: March 26, 2025

Room-temperature sodium-sulfur (RT Na-S) batteries are garnering interest owing to their high theoretical energy density and low cost. However, the notorious shuttle behavior of sodium polysulfides (NaPS) uncontrollable dendrite growth lead poor cycle stability RT Na-S cells. In this work, we report use 1,2-dimethoxypropane (DMP) 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether (TFTFE) as inner solvent outer diluent, respectively, in a localized high-concentration electrolyte system. Impressively, asymmetric DMP solvent, introduced replace conventional 1,2-dimethoxyethane (DME), shields NaPS effectively from incorporation into solvation structure due extra methyl groups molecular structure. Furthermore, TFTFE which contains electron-withdrawing perfluoro segments (-CF3- -CF2-), exhibits significantly power. Consequently, sheath diluent further minimizes dissolution, thereby enhancing stability. This inner-outer synergistic effect leads formation highly effective cathode-electrolyte interphase (CEI) solid-electrolyte (SEI) layers simultaneously, alleviating reducing side reactions between metal. Remarkably, cells with designed present long-cycling reversibility 530 mAh g-1 over 600 cycles at C/2 rate capacity decay 0.077% per cycle. study provides profound understanding involving offers firm basis for rational design electrolytes rechargeable metal-sulfur battery systems.

Language: Английский

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Bifunctional Electrolyte Additive in Room-Temperature Sodium–Sulfur Batteries

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: April 22, 2025

Language: Английский

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Tuning the Solvation Structure of a Weakly Solvating Cyclic Ether Electrolyte for Wide‐Temperature Cycling of Lithium‐Sulfurized Polyacrylonitrile Batteries

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 21, 2024

Abstract Sulfurized polyacrylonitrile (SPAN) cathodes in high energy‐density Li‐metal batteries have garnered widespread interest owing to their good cycling stability and moderately capacities. However, application is hindered by the low prevalence of advanced electrolytes that can simultaneously mitigate polysulfide generation at cathode stabilize anode. Here, a weakly solvating electrolyte presented, employing single solvent tetrahydropyran (THP). The solvation structure effectively tuned adjusting salt concentration both anode SPAN cathode. This approach enables stable with loadings (≈5 mg cm −2 ) lean contents µL −1 across wide temperature range: 0 °C, room temperature, 50 °C. A pouch cell loading electrolyte‐to‐SPAN (E/SPAN) ratio 3 shows 79.1% capacity retention after 40 cycles. Additionally, THP be employed localized high‐concentration (LHCE) systems reduce diluent‐to‐solvent for greater LHCE viability. study demonstrates potential solvents Li‐SPAN batteries, offering pathway practical application.

Language: Английский

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Advanced electrolytes for sodium metal batteries under extreme conditions

Energy storage materials, Journal Year: 2024, Volume and Issue: 72, P. 103753 - 103753

Published: Aug. 31, 2024

Language: Английский

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Ultra-long cycle sodium ion batteries enabled by glutaric anhydride additive

Chemical Science, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

For sodium-ion batteries, solving the issue of short cycle life is key to their large-scale adoption in industry, and electrolyte plays an important role on this. Herein, this work aims design a practical sodium ion battery with industrial application value introduces anhydride compounds as additives for first time. Meanwhile, by adjusting solvent composition using combination ether ester solvents, optimal formulation 1 M NaPF

Language: Английский

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Long-life Graphite – Lithium Sulfide Full Cells Enabled through a Solvent Co-intercalation-free Electrolyte Design

Materials Horizons, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 19, 2024

Graphite (Gr) is the predominant anode material for current lithium-ion technologies. The Gr could offer a practical pathway development of lithium-sulfur (Li-S) batteries due to its superior stability and safety compared Li-metal. However, anodes are not compatible with conventional dilute ether-based electrolytes typically used in Li-S systems. Here, an optimized ether electrolyte presented, utilizing 1 M lithium bis(trifluoromethanesulfonyl)-imide (LiTFSI) 1,3-dioxolane (DOL)/1,1,2,2-tetrafluoroethyl 2,2,3,3-tetrafluoropropylether (TTE). Without altering salt concentration, this regulates solvation structure promotes formation robust solid-electrolyte interphase (SEI) layer, leading significant improvement cyclability anodes. Meanwhile, DOL/TTE maintains adequate kinetics sulfur cathode, enabling pairing without any cathode modification. cell delivers reversible discharge capacity 515 mA h g

Language: Английский

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