Aqueous Zn-NaV3O8 (NVO) Pouch Cells (0.2-1.0 Ah), CAZnNVOPC

An Aqueous Zn-NaV3O8 Pouch Cell is an advanced, high-energy rechargeable energy storage system that pairs a sodium vanadium vanadate (NaV3O8) positive electrode with a metallic zinc negative electrode inside a flexible, soft-laminate pouch packaging format. Utilizing a safe, non-flammable aqueous zinc salt electrolyte, this system bridges the gap between high-capacity laboratory electrochemistry and scalable, practical energy storage.

The main components of the aqueous Zn-NaV3O8 pouch cell are: (1) Cathode (NaV3O8 Composite): The incorporation of sodium ions (Na+) into the vanadium oxide crystal lattice acts as a structural "pillar," expanding the interlayer spacing and creating wide, open tunnels or ribbon-like morphologies. Fabricated by slurrying active NaV3O8 powder with conductive carbon and polymeric binders, then doctor-blade coating the mixture onto corrosion-resistant current collectors (such as carbon-coated titanium mesh or carbon paper). (2) Zinc Metal Anode: Utilizes high-purity zinc foil or a 3D porous zinc substrate to supply Zn^{2+} ions during discharge. Pouch designs maintain a high Negative-to-Positive (N/P) capacity ratio (~ 3.0) to compensate for minor parasitic consumption and ensure long-term cycle stability. (3) Aqueous Electrolyte & Separator: Employs mild aqueous zinc salt solutions (typically 2 M ZnSO4, often with MnSO4 additive to suppress cathode dissolution and side reactions).

References:

1. J. H. Jo, et al. New Insight on Open-Structured Sodium Vanadium Oxide as High-Capacity and Long Life Cathode for Zn–Ion Storage: Structure, Electrochemistry, and First-Principles Calculation, Adv. Energy Mater., 2020, 10, 2001595.
2. A. Nicoll, et al. Understanding the Benefit of Hybrid Electrolytes towards Vanadium Dissolution Suppression and Improved Capacity Retention in Zinc-Aqueous Batteries Using NaV3O8 Cathodes, Batteries & Supercaps, 2025, 8, e202500036.