Solar energy factory photovoltaic colloidal battery

The battery storage will provide renewable energy to the facility and collect the electricity of the PV system – even at times when the factory isn't in operation, such as on weekends. The green hydrogen used at the site will be produced in the UK. An energy management system (EMS) will track changes in electricity demand and weather conditions.

Under the same working condition, the PP membrane-based flow batteries in blank electrolytes without starch showed inferior CE at around 65% with severe capacity loss, lower discharging capacity as ~25 Ah L −1catholyte, and short cycle lifespan (~50 cycles) due to the severe cross-over and short-circuits (Supplementary Fig. 30).

Benefiting from stable colloid additives, aqueous colloid electrolytes as fast ion carriers can modulate the typical electrolyte system for improving reversible plating/stripping on Zn anode for high-performance Zn ion batteries 43, 44.

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.

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.

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).