Are aqueous iron-based flow batteries suitable for large-scale energy storage applications?

Thus, the cost-effective aqueous iron-based flow batteries hold the greatest potential for large-scale energy storage application.

Can all-iron flow batteries be operated at low temperatures?

In 2024, Yang et al. proposed a highly soluble, polar and electron-donating additive, N,N -dimethylacetamide (DMAc), for operating all-iron flow batteries at low temperatures . In an aqueous environment below −10°C, smooth and compact iron deposition was demonstrated on carbon felt (CF), indicating excellent Fe 2+ /Fe 0 reversibility.

How much does an all-iron flow battery cost?

Benefiting from the low cost of iron electrolytes, the overall cost of the all-iron flow battery system can be reached as low as $76.11 per kWh based on a 10 h system with a power of 9.9 kW. This work provides a new option for next-generation cost-effective flow batteries for long duration large scale energy storage.

Are all-iron aqueous redox flow batteries suitable for large-scale energy storage?

All-iron aqueous redox flow batteries (AI-ARFBs) are attractive for large-scale energy storage due to their low cost, abundant raw materials, and the safety and environmental friendliness of using water as the solvent.

What is an example of an all-liquid all-iron flow battery?

For instance, Yan et al. came up with an all-liquid all-iron flow battery constructed by coupling an iron-triethanolamine (TEA) redox pair with an iron-cyanide redox pair in an alkaline aqueous system.

Why is electrolyte engineering important for all-iron flow batteries?

For all-iron flow batteries, electrolyte engineering is particularly important to mitigate HER, which competes with iron redox reactions. Additionally, optimizing carbon-based electrodes through surface modifications or catalyst coatings can enhance charge transfer efficiency.