This research examines vanadium-deficient VC MXene, a two-dimensional (2D) vanadium carbide with exceptional electrochemical properties for rechargeable zinc-ion batteries. Through a meticulous etching process, a V-deficient, porous architecture with an expansive surface area is achieved, fostering three-dimensional (3D) diffusion channels and boosting zinc ion storage. Analytical techniques like scanning electron microscopy, transmission electron microscopy, Brunauer-Emmett-Teller, and X-ray diffraction confirm the formation of VC MXene and its defective porous structure. X-ray photoelectron spectroscopy further verifies its transformation from the MAX phase to MXene, noting an increase in V and V states with etching. Cyclic voltammetry reveals superior de-zincation kinetics, evidenced by consistent V/V oxidation peaks at varied scanning rates. Overall, this V-deficient MXene outperforms raw MXenes in capacity and rate, although its capacity diminishes over extended cycling due to structural flaws. Theoretical analyses suggest conductivity rises with vacancies, enhancing 3D ionic diffusion as vacancy size grows. This work sheds light on enhancing V-based MXene structures for optimized zinc-ion storage.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/smtd.202301461 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Electrolyte Decoupling Strategy for Metal Oxide-Based Zinc-ion Batteries Free of Crosstalk Effect.
Angew Chem Int Ed Engl
January 2025
Tsinghua University, Tsinghua Shenzhen International Graduate School, CHINA.
The crosstalk of transition metal ions between the metal oxide cathode and Zn anode restricts the practical applications of aqueous zinc-ion batteries (ZIBs). Herein, we propose a decoupled electrolyte (DCE) consisting of a nonaqueous-phase (N-phase) anolyte and an aqueous-phase (A-phase) catholyte to prevent the crosstalk of Mn2+, thus extending the lifespan of MnO2-based ZIBs. Experimental measurements and theoretical modelling verify that trimethyl phosphate (TMP) not only synergistically works with NH4Cl in the N-phase anolyte to enable fast Zn2+ conduction while block Mn2+ diffusion toward anode, but also modifies the Zn2+ solvation structure to suppress the dendrite formation and corrosion on Zn anode.
View Article and Find Full Text PDFA multifunctional quasi-solid-state polymer electrolyte with highly selective ion highways for practical zinc ion batteries.
Nat Commun
January 2025
State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
The uncontrolled dendrite growth and detrimental parasitic reactions of Zn anodes currently impede the large-scale implementation of aqueous zinc ion batteries. Here, we design a versatile quasi-solid-state polymer electrolyte with highly selective ion transport channels via molecular crosslinking of sodium polyacrylate, lithium magnesium silicate and cellulose nanofiber. The abundant negatively charged ionic channels modulate Zn desolvation process and facilitate ion transport.
View Article and Find Full Text PDFAnti-dendrite separator interlayer enabling staged zinc deposition for enhanced cycling stability of aqueous zinc batteries.
Nat Commun
January 2025
Faculty of Materials Science and Energy Engineering, Shenzhen University of Advanced Technology, Shenzhen, China.
Aqueous zinc ion batteries exhibit great prospects due to their low cost and high safety, while their lifespan is limited by severe dendritic growth problems. Herein, we develop an anti-dendrite hot-pressing separator interlayer through a mass-producible hot-pressing strategy, by spreading metal-organic framework (MOF) precursor on nonwoven matrix followed by a simple hot-pressing process. The in situ modification of MOF crystals on fiber surface processes abundant nitrogenous functional groups and high specific surface area (190.
View Article and Find Full Text PDFEnhancing Zinc Anode Reversibility through Dynamic Interface Engineering with Monolayer Hydrophobic Carbon Dots.
ACS Nano
January 2025
State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
Aqueous zinc-ion batteries promise low-cost and safe grid storage, but their practical application is hindered by poor Zn anode reversibility, primarily due to dendrite formation and water-induced side reactions in the electric double layer (EDL) structure. Herein, a monolayer of hydrophobic carbon dots (CDs) was dynamically constructed at the electrode/electrolyte interface. The trace-added hydrophobic CDs in the electrolyte reconstruct a hydrophobic and favorable EDL structure, suppressing water-induced side reactions in the inner Helmholtz layer and facilitating the desolvation of hydrated zinc ions at the outer Helmholtz layer.
View Article and Find Full Text PDFAdvanced Alkali Metal Batteries based on MOFs and Their Composites.
ChemSusChem
January 2025
Yangzhou University, College of Chemistry and Chemical Engineering, Siwangting road, NO.180, 225002, Yangzhou, CHINA.
The integration of metal-organic frameworks (MOFs) with functional materials has established a versatile platform for a wide range of energy storage applications. Due to their large specific surface area, high porosity, and tunable structural properties, MOFs hold significant promise as components in energy storage systems, including electrodes, electrolytes, and separators for alkali metal-ion batteries (AIBs). Although lithium-ion batteries (LIBs) are widely used, their commercial graphite anode materials are nearing their theoretical capacity limits, and the scarcity of lithium and cobalt resources increases costs.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!