
Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 26, 2025
Language: Английский
Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 26, 2025
Language: Английский
Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 7, 2025
Abstract With the increasing safety concerns and consensus on sustainability, aqueous zinc‐ion batteries (AZIBs) are gaining significant attention as a green efficient alternative for energy storage technologies. However, prolonged persistent chemical dissolution electrochemical capacity fading of one dominant vanadium oxide cathodes has long posed an unavoidable challenge. Meanwhile, mechanism AZIBs remains controversial, along with formation parasitic derived cathode‐related products during repeated charge/discharge procedure. Herein, this review expects to provide comprehensive analysis fundamental redox reactions in oxide‐based AZIBs, particular emphasis nanostructure features their evolution, ionic transference, occupation, elucidate underlying mechanisms involved system. Furthermore, several effective strategies, including cathode modification electrolyte design summarized. Finally, offers potential avenues advancing materials, inorganic colloids, high‐entropy electrolytes, characterization, thereby contributing continued development field.
Language: Английский
Citations
4Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 20, 2024
Abstract Vanadyl phosphate (VOPO 4 ) is extensively studied as a cathode material for aqueous zinc‐ion batteries (AZIBs). However, due to sluggish ion migration and low electrical conductivity, VOPO typically exhibits moderate specific capacity below 200 mAh g −1 . To address these issues, an iodine (I 2 )‐mediated etching method proposed enhance the electrochemical performance of AZIBs. This effectively regulates structural defects in Initially, I undergoes disproportionation reaction with interlayer H O , inducing crystal nanosheet structure. Additionally, generated HI reduces V 5+ further introducing oxygen vacancies Both experimental computational results indicate that can synergistically improve electron transfer diffusion kinetics electrode. excessive lead crystalline amorphization pulverization impeding Zn 2+ within material. Therefore, iodine‐mediated etched electrode (VOP‐I4) high 249 at current density 0.2 A large energy 300 Wh kg power 246.2 W outperforming most reported ‐based materials study provides new avenue developing high‐performance storage applications.
Language: Английский
Citations
3Nano Letters, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 26, 2025
VOPO4·2H2O (VOP) has attracted significant attention as a cathode material for aqueous zinc-ion batteries owing to its layered structure and high-voltage plateau. However, application is hindered by sluggish Zn2+ transport kinetics instability in electrolytes, leading rapid capacity fading over cycling. In the present work, diethylene glycol (DEG) pre-intercalated VOP (DEG-VOP) with flower-like morphology prepared facile hydrothermal method. The DEG molecules enlarge interplanar lattice of (001) plane introduce oxygen vacancies, accelerating mass charge transfer kinetics. addition, pre-intercalation induces self-assembly nanosheets into structure, which exposes more (201) planes, providing additional ion channels. also enhances hydrophobicity VOP, effectively suppressing decomposition dissolution. These result significantly improved discharge capacity, retention 86% after 2000 cycles at 1 A g–1.
Language: Английский
Citations
0Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 26, 2025
Language: Английский
Citations
0