PVP-I {Poly(vinylpyrrolidone)–Iodine} Powder as Battery Electrode Binder, 100 g/bottle, CBEBPVPI

Poly(vinylpyrrolidone)–Iodine (PVP-I), commonly known as Povidone-Iodine, is an emerging multifunctional inorganic-organic hybrid binder and cathode component. While traditionally used as a medical antiseptic (e.g., Betadine), its unique chemical structure makes it a powerful "smart" material for next-generation Lithium-Iodine (Li-I₂) and Aluminum-Iodine (Al-I₂) batteries.

In battery systems, PVP-I acts as both a structural glue and a chemical stabilizer for the iodine active material. In iodine-based batteries, soluble polyiodide ions (I3- and I5-) tend to migrate to the anode, causing rapid capacity loss.5 The pyrrolidone rings in the PVP chain form strong hydrogen bonds and donor-acceptor complexes with iodine, effectively "trapping" it at the cathode. By stabilizing the triiodide (I3-) species, PVP-I ensures that the conversion reaction is highly reversible, allowing for thousands of cycles with minimal degradation.

Moreover, PVP-I is also the "gold standard" for experimental Al-I₂ cathodes. It helps achieve high capacities (>200 mAh/g) and excellent stability in corrosive ionic liquid electrolytes. White in Li-I2 battery system, it is used as a combined binder and active material to create ultra-stable cathodes that can survive over 9,000 cycles when paired with specialized electrolytes.

Part Number	CBEBPVPI (C-BEB-PVPI)
CAS	25655-41-8
Chemical Formula	(C6H9NO)n • xI2
Appearance	Dark Brown Powder
Package Size	100 g/bottle

Notes: Please try to store the PVPI powders in a dry place (glovebox is the best option). 

References: 

1. M. M. Nishshanke, et al. Role of Polymer-Iodine Complexes on Solid-Liquid Polysulfide Phase Transitions and Rate Capability of Lithium Sulfur Batteries, Adv. Energy Mater., 2025, 15, 2403092.
2. J. Yang, et al. High-capacity zinc–iodine flow batteries enabled by a polymer–polyiodide complex cathode, J. Mater. Chem. A, 2021,9, 16093-16098.