Does polyiodide cross-over affect grid-level battery performance?

However, capacity loss and low Coulombic efficiency resulting from polyiodide cross-over hinder the grid-level battery performance. Here, we develop colloidal chemistry for iodine-starch catholytes, endowing enlarged-sized active materials by strong chemisorption-induced colloidal aggregation.

Can colloidal starch confine polyiodides under high temperature?

For the I x− permeability under high temperature of 50 °C (Supplementary Figs. 42 and 43), the colloidal starch could strongly confine the polyiodides by forming a colloidal aggregation featuring low I x− permeability to impede the cross-over issue even at a severe condition of high temperature.

How stable is a colloidal is FB?

The colloidal IS-based Zn-IS FBs with polypropylene (PP) membranes as LPPM could deliver superior performance of cycling stability for 350 cycles at high current density. In addition, due to the strong chemisorption between starch and iodine redox, the as-developed colloidal IS systems remained stable.

Are aqueous Zn-i flow batteries suitable for high-power-density energy storage?

Nature Communications 15, Article number: 3841 (2024) Cite this article Aqueous Zn-I flow batteries utilizing low-cost porous membranes are promising candidates for high-power-density large-scale energy storage. However, capacity loss and low Coulombic efficiency resulting from polyiodide cross-over hinder the grid-level battery performance.

Does starch confinement enhance i 0 / i conversion efficiency in zinc iodine batteries?

Zhao, D. et al. Enhancing I 0 /I − conversion efficiency by starch confinement in zinc–iodine battery. Energy Environ. Mater. 7, e12522 (2024). Liu, M. et al. Physicochemical confinement effect enables high-performing zinc–iodine batteries. J. Am. Chem. Soc. 144, 21683–21691 (2022).