Technology Outline (Process Description)

Low-cost Iron-based Redox Flow Batteries (IRFBs) are a promising technology for efficient and sustainable energy storage in renewable energy systems. IRFBs utilize abundant and inexpensive iron-based electrolytes, making them cost-effective com- pared to other flow battery chemistries.

The technology operates by storing energy in the form of electroactive species dissolved in the electrolyte. During charging, electricity from renewable sources drives the electrolysis of iron salts, converting them into higher-valence states. The charged electrolyte is then stored in separate tanks. During discharge, the electrolyte is circulated through an electrochemical cell, where the iron species undergo reduction, releasing electrons and generating electricity.

The advantages of IRFBs include long cycle life, high energy efficiency, and scalability. The low cost of iron-based electrolytes enables large-scale deployment, making IRFBs suitable for grid-scale energy storage applications. Additionally, their excellent cycling stability and high energy efficiency contribute to their appeal.

To enhance performance, ongoing research focuses on improving electrode materials, electrolyte compositions, and system designs. By optimizing these factors, IRFBs have the potential to revolutionize renewable energy storage, facilitating a reliable and sustainable transition towards a clean energy future.