Toward High‐Performance, Flexible, Photo‐Assisted All‐Solid‐State Sodium‐Metal Batteries: Screening of Solid‐Polymer‐Based Electrolytes Coupled with Photoelectrochemical Storage Cathodes

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

Published: Feb. 18, 2025

Abstract The advancement of photo‐assisted rechargeable sodium‐metal batteries with high energy efficiency, lightweight structure, and simplified design is crucial for the growing demand in portable electronics. However, addressing intrinsic safety concerns liquid electrolytes sluggish reaction kinetics existing photoelectrochemical storage cathodes (PSCs) remains a significant challenge. In this work, functionalized light‐driven composite solid electrolyte (CSE) fillers are systematically screened, optimized PSC materials employed to construct advanced solid‐state battery (PSSMB). To further enhance mechanical properties poly(ethylene oxide) compatibility CSE, natural lignocellulose incorporated, enabling fabrication flexible PSSMBs. situ tests density functional theory calculations reveal that electric field facilitated sodium salt dissociation, reduced interfacial resistance, improved ionic conductivity (0.1 mS cm −1 ). Meanwhile, energy‐level matching maximized utilization photogenerated carriers, accelerating enhancing interface between cathode. resulting pouch‐type PSSMB demonstrates remarkable discharge capacity 117 mAh g outstanding long‐term cycling stability, retaining 89.1% its achieving an efficiency 96.8% after 300 cycles at 1 C. This study highlights versatile strategy advancing safe, high‐performance batteries.

Language: Английский

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Charge-Complementary Hydrogen-Bonded Complex Separator for Realizing Dendrite-Free Aqueous Zinc-Ion Batteries

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

Published: March 7, 2025

With the merits of high reliability, cost-effectiveness, and ecofriendliness, aqueous zinc-ion batteries (AZIBs) are promising for grid-scale energy storage. However, zinc dendrites associated side reactions encountered in AZIBs, leading to a reduced lifespan. This work presents novel separator design strategy tackle these problems through synergistic combination chitosan sodium alginate, which contain cationic anionic functional groups, respectively. The complementary polarity two polymer matrices strong hydrogen bonding between them can establish unique electrostatic environment that offers isolated transport paths cations anions construct robust stable complex structure. Besides, both biopolymers have affinity with H2O molecules Zn(002) crystal facet. Hence, effectively promote Zn2+ ion transport, uniformize distributions, restrain interfacial planar diffusion ions, facilitate desolvation process, boost dynamics. It is demonstrated systematic experiments suppress adverse phenomena at metal/electrolyte interface, resulting significantly stabilized chemistry. use such separator, extraordinary cycling stability achieved Zn//Zn cells full even under remarkable areal capacities. research new concept battery separators.

Language: Английский

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Enhanced Zinc Deposition and Dendrite Suppression in Aqueous Zinc‐Ion Batteries Via Citric Acid‐Aspartame Electrolyte Additives

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

Published: March 24, 2025

Abstract Despite the advantages of low cost, safety, and environmental friendliness, aqueous zinc‐ion batteries (AZIBs) encounter challenges such as zinc dendrite formation, severe side reactions, electrolyte instability. Many effective additives exhibit limited solubility in water, thus reducing their practical application potential. In this study, a dissolution‐promoting strategy is proposed by introducing citric acid (CA) to enhance dissolution aspartame (APM), resulting sulfate electrolyte. Simulations experiments indicate that CA regulates both solvation structure Zn 2+ pH electrolyte, while APM preferentially integrates into electric double layer form solid interphase with CA, thereby suppressing hydrogen evolution reactions. Consequently, zinc‐zinc symmetric cell exhibits an extended lifespan over 4,500 h at 1.0 mA cm −2 /1.0 mAh . As result, AZIBs commercial foil MnO 2 enhanced rate capability improved capacity retention (75.6%) after 2,000 cycles. This study presents novel for stabilizing anodes offers comprehensive framework addressing fundamental AZIBs, advancing next‐generation energy storage systems.

Language: Английский

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Defect Vacancies in Pitch-Based Hard Carbon Coating for a Long-Life Nature Graphite Anode

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: April 22, 2025

Language: Английский

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