Capturing Failure Mechanisms in Vanadium Oxide Cathodes for Aqueous Zinc Batteries DOI Creative Commons
Zhi Li, Xuesong Xie, Yang Yang

et al.

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 26, 2025

Abstract Aqueous zinc ion batteries (ZIBs) attract increasing attention as alternative energy storage technologies due to their merits of safety and low cost. However, the continuous dissolution active materials in vanadium oxide-based ZIBs has posed an unavoidable challenge. Here, we systematically analyzed mechanism using both ex-situ in-situ methods. Experimental theoretical analyses revealed excessive reduction valence following H+ insertion at potentials above 1.0 V (vs. Zn2+/Zn), primarily contributing rather than Zn2+ insertion. Protons preferentially form monodentate coordination with oxygen, local electron density around atoms facilitating more transitions from 1s higher-energy 3d states. This leads a pronounced V-valence V-O bond breakage. Specifically, interlayer-inserted exhibits highest its significant binding compared surface-inserted H+. As proof concept, without additives or cathode modifications, electrochemical improvements Zn/NH4V4O10 Zn/V2O5 were achieved by reducing cut-off voltage current high directly inhibit promote favorable surface-dominant We contend that understanding chemistry electrochemistry-related failure mechanisms are crucial for designing Adv. Mater. applications.

Language: Английский

Failure Mechanisms and Strategies for Vanadium Oxide‐Based Cathode in Aqueous Zinc Batteries DOI Open Access

Rohit Kumar Sinha,

Xuesong Xie, Yang Yang

et al.

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

4
Iodine‐Mediated Defect Engineering of Vanadyl Phosphate Cathodes for High‐Performance Aqueous Zinc‐Ion Batteries DOI Open Access

Yulai Lin,

Jianming Meng,

Peng Hei

et al.

Advanced 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

3
Enabling Fast and Stable Zinc-Ion Storage in Vanadyl Phosphate Cathodes DOI
Xuelian Liu, Quan Zong,

Keyi Chen

et al.

Nano 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

0
Capturing Failure Mechanisms in Vanadium Oxide Cathodes for Aqueous Zinc Batteries DOI Creative Commons
Zhi Li, Xuesong Xie, Yang Yang

et al.

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 26, 2025

Abstract Aqueous zinc ion batteries (ZIBs) attract increasing attention as alternative energy storage technologies due to their merits of safety and low cost. However, the continuous dissolution active materials in vanadium oxide-based ZIBs has posed an unavoidable challenge. Here, we systematically analyzed mechanism using both ex-situ in-situ methods. Experimental theoretical analyses revealed excessive reduction valence following H+ insertion at potentials above 1.0 V (vs. Zn2+/Zn), primarily contributing rather than Zn2+ insertion. Protons preferentially form monodentate coordination with oxygen, local electron density around atoms facilitating more transitions from 1s higher-energy 3d states. This leads a pronounced V-valence V-O bond breakage. Specifically, interlayer-inserted exhibits highest its significant binding compared surface-inserted H+. As proof concept, without additives or cathode modifications, electrochemical improvements Zn/NH4V4O10 Zn/V2O5 were achieved by reducing cut-off voltage current high directly inhibit promote favorable surface-dominant We contend that understanding chemistry electrochemistry-related failure mechanisms are crucial for designing Adv. Mater. applications.

Language: Английский

Citations

0