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Electrostatic and Structural Engineering in Preintercalated V2O5: A Design Framework for Multivalent Ion Storage
Anagha P Vincent1, P Vipin Kumar1,2, S B Gudennavar1
1Department of Physics and Electronics CHRIST University Bengaluru India.
Small Science
|August 4, 2026
Summary
Preintercalation in vanadium oxides stabilizes structures and enhances electrochemical performance by tuning ion transport and electrostatic interactions. This unified framework guides the design of advanced layered oxide cathodes for energy storage.
Area of Science:
- Materials Science
- Electrochemistry
- Solid-State Chemistry
Background:
- Preintercalation is a key strategy for improving layered vanadium oxide cathodes.
- A unified mechanistic understanding of preintercalation's effects is currently lacking.
Purpose of the Study:
- To establish a unified framework for understanding how preintercalation influences ion transport, structural stability, and electrochemical behavior in V2O5-based cathodes.
- To identify design principles for optimizing preintercalation in layered oxides.
Main Methods:
- Systematic analysis of monovalent, divalent, and trivalent preintercalated metal ions.
- Investigation of the coupled structural-electrostatic mechanism involving interlayer spacing, charge screening, and solvation.
- Redefinition of the role of structural water as an electrostatic mediator.
Main Results:
- Preintercalation stabilizes the lattice and tunes the electrostatic environment via guest species acting as interlayer pillars.
- Ionic size, charge density, hydration state, and electronic structure critically influence Zn2+ diffusion barriers and redox kinetics.
- Structural water actively reduces effective ion charge and migration barriers.
Conclusions:
- A generalizable design framework for preintercalation engineering in layered oxides has been established.
- This framework has implications for zinc-ion, multivalent, and hybrid energy storage systems.
- Understanding preintercalation's coupled structural-electrostatic mechanism is crucial for advanced cathode design.
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