Facile Design of Multiscale Cellulose‐Enhanced Hydrogel Electrolytes for Flexible Zn‐Ion Capacitors in Wearable Electronics

Macromolecular Rapid Communications, Год журнала: 2025, Номер unknown

Опубликована: Апрель 30, 2025

Flexible solid-state supercapacitors show significant potential for wearable electronics; however, achieving simultaneous mechanical robustness and high ionic conductivity remains challenging. In this work, a polyacrylamide (PAM)/cellulose nanocrystal (CNC)-based hydrogel electrolyte loading with carboxymethyl cellulose (CMC) is engineered to address limitation (PAM/CNC-CMC-Zn2+). Incorporating CNC improved the properties of hydrogels, while subsequently adding CMC-Na enriched hydrophilic groups (─OH ─COO-) into PAM/CNC hydrogels disrupted hydrogen-bond networks within ZnSO4 electrolyte, thereby optimizing Zn2+ solvation sheath structure. This modification suppressed corrosion currents minimized side reactions. The demonstrated outstanding properties, including tensile strength 0.22 MPa, stretchability (1452.1%), remarkable fracture toughness (0.98 MJ m-3). zinc-ion capacitors (Zn // PAM/CNC-CMC-Zn2+ AC) demonstrate exceptional electrochemical performance, specific capacitance 151.4 F g⁻¹ at 0.5 A g⁻¹, coupled power density 1150 W kg⁻¹ (at 10.9 Wh kg⁻¹). Notably, device exhibits performance stability, maintaining its functionality under folding retaining efficiency after 10 000 long charge-discharge cycles. These multiscale cellulose-based design highlights electrolyte's dual in balancing adaptability efficiency, offering solution next-generation energy storage systems.

Язык: Английский

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Quasi-Solid-State Electrolytes: Bridging the gap between solid and liquid electrolytes for Zinc-Ion batteries

Chemical Engineering Journal, Год журнала: 2025, Номер 514, С. 162994 - 162994

Опубликована: Май 1, 2025

Язык: Английский

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Micro–Macro Hierarchical Hydrogel Architectures with Dual‐Scale Polyanionic Networks for High Energy Density PBA||Zn Batteries

Small, Год журнала: 2025, Номер unknown

Опубликована: Май 23, 2025

Abstract Hydrogel electrolytes are promising for aqueous zinc metal batteries but face challenges in suppressing Zn dendrites and cathode dissolution. This study develops a polyanionic hydrogel electrolyte, poly(2‐acrylamido‐2‐methyl‐1‐propanesulfonic acid‐co‐acrylamide) (P(AMPS‐co‐AM)), featuring dense porous structure that enables higher 2+ transference number (t = 0.81) homogeneous deposition. Additionally, the further reduces proportion of free water molecules, thereby side reactions. Based on benefits hydrogel, Zn||Zn symmetric cell demonstrates over 3000 h continuous cycling, Zn||Cu asymmetric exhibits an exceptional Coulombic efficiency 99.29% first cycle. Benefiting from fixation transition metals by groups reduced content molecules within densely packed architecture, PBA||Zn full achieves high energy density 267 Wh kg −1 . electrolyte design strategy provides significant insights achieving long cycle life through both microscale macroscale to achieve low cost zinc‐metal (AZMBs).

Язык: Английский

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Super-Reversible CuCl Cathode Enabled by Cu2+-Coordinated Alginate and Carbon Composite Film for Chloride Ion Battery

Electrochimica Acta, Год журнала: 2025, Номер unknown, С. 146659 - 146659

Опубликована: Июнь 1, 2025

Язык: Английский

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