Vanadium Pentoxide (V2O5, >99.9%) Nanopowder (~50 nm) for Aqueous Zn-Ion Battery Cathode, 50-100 g/Bottle, CAZIBCV2O5NP

Vanadium pentoxide (V2O5) nanopowder is one of the most extensively studied and high-performance intercalation cathode materials for aqueous zinc-ion batteries (AZIBs).Due to its layered or open orthorhombic framework, multi-valence vanadium redox chemistry (V^{5+}/V^{4+}/V^{3+}), and high theoretical capacity, it serves as a benchmark host for divalent zinc ion insertion.

The key electrochemical advantages of the V2O5 nanopowder for aqueous Zn-Ion battery are: (1) Reversible Zn^{2+} Intercalation and Deintercalation: During discharge, zinc ions (Zn^{2+}) intercalate into the interlayer galleries of the V2O5 crystal lattice, accompanied by the reduction of vanadium ions from V^{5+} to lower oxidation states (V^{4+} and V^{3+}). Upon charging, Zn^{2+} ions are extracted, reversing the process. (2) Proton Co-Intercalation: In many mild aqueous systems (such as ZnSO4 electrolytes), a concurrent proton (H+) co-intercalation mechanism often occurs due to minor localized pH fluctuations near the cathode surface. This dual-ion insertion helps maintain structural charge balance and contributes to high initial capacities.

The nanosize dimension brings the following advantages: (1) Shortened Solid-State Diffusion Paths: Divalent zinc ions (Zn^{2+}) possess a high charge density and strong electrostatic interactions with host lattice oxygen atoms, resulting in intrinsically sluggish solid-state diffusion. Scaling V2O5 down to the nanoscale (e.g., nanoparticles, nanobelts, or ultra-thin nanosheets) drastically reduces the diffusion distance required for Zn^{2+}, accelerating charge-transfer kinetics. (2) Enhanced Electrochemically Active Surface Area: A high surface-to-volume ratio maximizes contact with the aqueous electrolyte, exposing more active redox sites and lowering local interfacial resistance. (3) Mechanical Stress Accommodation: Nanostructured architectures can better accommodate the localized lattice expansion and contraction that occurs during repeated ion insertion and extraction, preventing premature structural pulverization.

References: 

1. K. Zhu, et al. Understanding the Dissolution and Phase Transformation Mechanisms in Aqueous Zn/α‑V2O5 Batteries, Chem. Mater. (2021) 33 (11): 4089–4098.
2. A. Guo, et al. A Comprehensive Review of the Mechanism and Modification Strategies of V2O5 Cathodes for Aqueous Zinc-Ion Batteries, ACS Nano (2024) 18 (40): 27261–27286.