Capturing Failure Mechanisms in Vanadium Oxide Cathodes for Aqueous Zinc Batteries

Research Square (Research Square), Год журнала: 2025, Номер unknown

Опубликована: Фев. 26, 2025

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.

Язык: Английский

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Innovative synergistic control of electric fields and Zn²⁺ dynamics for revolutionizing zinc metal battery stability

Chemical Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Aqueous zinc-ion batteries (ZIBs) are emerging as promising next-generation energy storage systems due to their inherent safety, environmental sustainability, and cost-effectiveness. However, widespread application is hindered by challenges such dendritic Zn growth, hydrogen evolution, corrosion-induced passivation, which compromise performance scalability. To overcome these obstacles, we developed a novel dual-interface modified zinc anode integrating fluoride (ZnF2)-silicon (Si) interface using fluorine-doped silicon nanoparticles encapsulated within hollow mesoporous carbon nanospheres (F-Si@HMCS). The in situ formation of ZnF2 layer provides high electrochemical stability, effectively suppressing dendrite formation, mitigating corrosion, reducing side reactions with the electrolyte. silica further facilitates uniform electrodeposition forming Si-O-Zn bonds, regulate electric field distribution lower nucleation barriers. Additionally, structure efficient ion transport acts buffer against volume changes during cycling. Consequently, F-Si@HMCS@Zn electrode exhibits long lifespan over 2500 h at 5 mA cm-2 capacity 0.5 symmetrical cell test. When coupled α-MnO2 cathodes, resulting ZIBs exhibit outstanding stable cycle life 2000 cycles 2 A g-1.

Язык: Английский

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MOF-based electrode materials for aqueous zinc-ion batteries: design strategy and future challenges

Inorganic Chemistry Frontiers, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Summary of MOF-based aqueous zinc-ion battery electrode materials design strategies.

Язык: Английский

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Enhancing Safety in Lithium Batteries: A Review on Functional Separators Controlling Substance and Heat During Thermal Runaway

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 5, 2025

Abstract In past few decades, the rapid advancement of lithium battery technology has revolutionized our lives by powering portable electronic devices and vehicles. However, increasing risk thermal runaway (TR) poses significant challenges to their wider application, particularly regarding detrimental effects on electric vehicles large‐scale energy storage. The separator, serving as a barrier between cathode anode, is critical in preventing active materials generate Joule heat, thereby playing vital role ensuring safety. As understanding TR mechanism deepens, it evident that numerous exothermic reactions substances are closely linked separator. Consequently, functional design development runaway‐blocking separators (TR‐blocking separators) regarded key strategies for mitigating TR. intricate relationships these remain poorly understood, making challenging gain progress targeted separators. This review presents an in‐depth analysis regulating internal side batteries minimize heat release during TR, summarize advancements TR‐blocking enhancing safety at different stages. Furthermore, insights into presented based previous studies various unfavorable reactions. Additionally, future directions suggested

Язык: Английский

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A MOF@ZnIn₂S₄ Composite Quasi‐Solid Electrolyte for Highly Reversible Zn‐Ion Batteries

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 12, 2025

Abstract Zn‐ion batteries hold significant promise for large‐scale energy storage systems owing to their intrinsic safety and cost‐effectiveness. However, practical deployment is hindered by uncontrolled dendrite growth sluggish electrode reaction kinetics at metallic Zn anodes. To overcome these limitations, a quasi‐solid electrolyte (M@Z) based on MOF@ZnIn 2 S 4 composite presented. This innovative exhibits high room‐temperature conductivity (0.99 mS cm −1 ) an improved 2+ transference number (0.54). The microporous MOF component ensures uniform deposition effectively suppresses formation. Meanwhile, the ZnIn nanosheets wrapped around particles promote formation of beneficial In/ZnS‐contained interphase anodes during cycling, which mitigates side reactions accelerates anode kinetics. By virtue above merits, symmetric cells achieve stabilized plating/stripping over 3130 h with low overpotential tolerate critical current density 10 mA −2 . Furthermore, vanadium‐based full assembled M@Z deliver exceptional cycling stability, almost no capacity decay after 1000 cycles 1.0 A g

Язык: Английский

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