Biopolymeric Gels: Advancements in Sustainable Multifunctional Materials

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

Published: Feb. 9, 2025

With the growing emphasis on building a global sustainable community, biopolymeric gels have emerged as promising platform for environmentally friendly and applications, garnering significant research attention. Compared to conventional synthetic gels, offer numerous advantages, including abundant renewable raw materials, energy-efficient eco-friendly fabrication processes, tunable physicochemical properties, superior biocompatibility biodegradability. This review provides comprehensive overview of recent advancements in multifunctional gels. It begins by introducing various blocks their intrinsic properties across multiple scales. Subsequently, strategies are thoroughly discussed, emphasizing versatile gelation strategies, approaches fabricating diverse processing achieve tailorable with desired functionalities. The applications systematically explored, focusing roles energy storage, environmental remediation water management, thermal bioelectronics. Finally, concludes an outlook challenges opportunities advancing key materials pursuit sustainability.

Language: Английский

Innovative Design of a Double‐Layer Gradient Coating for Dendrite‐Free and Ultrastable Zinc Anodes

Small, Journal Year: 2025, Volume and Issue: 21(11)

Published: Feb. 14, 2025

Abstract The rampant “top‐growth” dendrites, hydrogen evolution reaction (HER), and zinc (Zn) self‐corrosion severely impede the further development of rechargeable aqueous ion batteries. To address these challenges, a novel double‐layer gradient coating consisting zincophilic Sn inner layer an organic polymer outer (OSA/PAM@Sn) is constructed on surface Zn anode. layer, composed cross‐linked oxidized sodium alginate polyacrylamide (OSA/PAM), not only serves as physical barrier to isolate active water but also accelerates 2+ diffusion by facilitating desolvation process [Zn(H 2 O) 6 ] due its plentiful polar functional groups, thereby effectively suppressing detrimental HER self‐corrosion. Simultaneously, loose can offer abundant nucleation sites induce uniform “bottom‐to‐top” deposition with low overpotential. Benefiting from synergistic effect designed coating, OSA/PAM@Sn‐Zn anode exhibits remarkable reversibility, lifespans over 5000 1200 h at 1 mA cm −2 –1 mAh 5 –5 in symmetric cells, respectively. Additionally, MnO ||OSA/PAM@Sn‐Zn full battery displays improved rate performance cycle stability. This work emphasizes importance effects interface design achieve side reaction‐free dendrite‐free anodes.

Language: Английский

Ionic Liquid‐Based Hydrogel Electrolytes Enabling High‐Voltage‐Plateau Zinc‐Ion Batteries

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

Published: March 5, 2025

Abstract Aqueous zinc ion batteries (ZIBs) have been recognized as highly promising energy storage systems due to their high safety, low cost, and environmental benignity. However, voltage platform of cathode, coupled with uneven Zn deposition, side reactions, limited operational temperature range caused by free water molecules, has hampered the practical application ZIBs. To address these issues, 1‐ethyl‐3‐methylimidazolium acetate (EmimAc) ionic liquid (IL) is utilized modify active in polyvinyl alcohol (PVA)‐based hydrogel electrolyte. The abundant hydroxyl groups on PVA chains, along strong interactions between IL H 2 O, disrupt hydrogen bonds molecules. This electrolyte alleviates improves low‐temperature performance through suppressing crystallization lowering freezing point Furthermore, binding 2+ restricts migration, ensuring de‐intercalation Na + at 3 V (PO 4 ) (NVP) thereby maintaining a plateau (1.48 V) for improved density. Benefitting from merits, pouch cell Zn||NVP achieves 100 cycles 25 °C, coin 81.3% capacity retention after 1600 −20 °C. work represents significant advance designing expanded voltage/temperature electrolytes

Language: Английский