Coupling of Mechanical, Self‐Healing, Adhesion, and High‐Ion Conducting Properties in Anti‐Freezing Hydrogel Electrolytes of Zinc Ion Batteries via Fe³⁺‐Carboxylate Coordination

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

Published: April 14, 2025

Abstract Aqueous zinc‐ion batteries (AZIBs) based on hydrogel electrolytes are considered promising flexible power supplies owing to their intrinsic safety, competent volumetric energy density, and eco‐friendliness. However, severe mechanical deterioration of the caused by insufficient inter‐component contact, zinc (Zn) dendrites, freezing prevents commercialization. Herein, it is found that, doping a trace Fe 3+ ions afford ‐carboxylate supramolecular interaction, practicality an archetypal cellulose nanofiber‐reinforced electrolyte significantly improved in couple aspects, including three eight times increase tensile strength toughness without loss ion conducting ability (up 32 mS cm −1 ) being room‐temperature self‐healable strongly adhesive various battery components. Together with use anti‐freezing mixed Zn salt, resulting able deliver ultrahigh cycling reversibility (averaging 99.4%), great cyclability AZIBs (a high specific capacity 180 mAh g retention 81%), render operable under abuse conditions 180° folding, exposure liquid nitrogen, cutting–rehealing cycles. This work unlocks enormous potential chemistry development self‐healable, anti‐freezing, extreme‐environment‐adaptable gel for storage devices.

Language: Английский

Solvation Structure and Interface Engineering Synergy in Low-Temperature Sodium-Ion Batteries: Advances and Prospects

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(11), P. 820 - 820

Published: May 29, 2025

The performance degradation of sodium-ion batteries (SIBs) in extremely low-temperature conditions has faced significant challenges for energy storage applications extreme environments. This review systematically establishes failure mechanisms that govern the SIBs, including significantly increased electrolyte viscosity, lattice distortion and adverse phase transitions electrodes, sluggish desolvation kinetics at solid interface. Herein, we specifically summarize a series multi-scale optimization strategies to address these challenges: (1) optimizing low-freezing-point solvent components regulating solvation structures increase ionic diffusion conductivity; (2) enhancing hierarchical structure electrodes electron distribution density improve structural stability capacity retention low temperatures; (3) constructing an inorganic-rich interphase induce uniform ion deposition, reduce barrier, inhibit side reactions. provides comprehensive overview SIB coupled with advanced characterization first-principles simulations. Furthermore, highlight solvation-shell dynamics, charge transfer kinetics, metastable-phase evolution atomic scale, along critical pathways overcoming limitations. aims establish fundamental principles technological guidelines deploying SIBs

Language: Английский