A Jointly Triggered H₂ Evolution Model Modulated Polyanionic Hydrogel Electrolyte for Reversible Zn Chemistry

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

Published: March 27, 2025

Abstract Hydrogen evolution reaction (HER) significantly deteriorates the stability of electrolytes and Zn anodes, yet dominant factor different H 2 stages is still unclear, especially in hydrogel electrolytes. Herein, a 2+ ‐solvated water deprotonation free ionization jointly triggered HER model revealed by an anionic group gradient regulating strategy polyanionic electrolyte system (PAHE). Combining experimental characterizations theoretical calculations, this confirms that solvated are key variables dominating onset potential intensity HER, respectively. An in‐depth understanding process realizes better inhibition through synchronously weakening activity. Additionally, fixed multi‐polyanions salt anions endow PAHE with high cation transfer efficiency accelerated desolvation kinetics forming cooperative ion pairs. Consequently, structurally electrochemically stable optimizes Zn‐electrolyte interface, markedly enhancing chemistry reversibility. As proof‐of‐concept, Zn/PAHE/LFP batteries yield superior capacity retention (>99.88% pre‐cycle), rate capability (up to 25 C), cycling durability (over 10000 cycles), wide‐temperature adaptability.

Language: Английский

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Dual-Shielding Solvent Strategy of High Dipole-Moment Monomers for Stabilizing Gel Polymer-Based Lithium Metal Batteries

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

Gel polymer electrolytes exhibit excellent interfacial compatibility and high ionic conductivity attributed to the incorporation of dipole-moment solvents. However, these solvents preferentially adsorb onto anode compared polymer, decomposing into an organic-rich layer with sluggish Li-ion transport kinetics. Furthermore, dominate solvation structure, intensifying formation unstable layers. Herein, a dual-shielding solvent strategy involving higher monomers is proposed mitigate undesirable effects in situ gelled electrolytes. High (allylthiourea 1,1,1,3,3,3-hexafluoroisopropyl acrylate) enhanced electrostatic adsorption, displacing adsorbed lithium metal. Moreover, robust dipole-dipole interactions between inhibit coordination Li-ions, resulting anion-dominated structures. This enables functional more anions synergistically form stable passivation rich LiF Li2S. Consequently, symmetric battery can operate stably for 5000 h at current density 0.25 mA cm-2, LiFePO4||Li maintains 97% capacity retention rate after 2000 cycles 2 C. work integrates properties design gel electrolytes, offering promising addressing challenges metal batteries.

Language: Английский

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Design of ultrafast lithium ion channel for solid-state lithium metal batteries by in-situ polymerization induced phase separation

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162810 - 162810

Published: April 1, 2025

Language: Английский

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Fluorinated ester additive-assisted carbonate-based electrolyte enhances low temperature operation of LiFePO4 batteries

Chinese Chemical Letters, Journal Year: 2025, Volume and Issue: unknown, P. 111263 - 111263

Published: April 1, 2025

Language: Английский

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Designing Aggregates-Dominated Electrolyte via Tuning Cation-Solvent Interaction for High-Safe and Long-Life Sodium-Ion Batteries

Energy storage materials, Journal Year: 2025, Volume and Issue: unknown, P. 104297 - 104297

Published: April 1, 2025

Language: Английский

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