Redox flow batteries are emerging as a promising solution for large-scale, safe, and flexible energy storage—critical for stabilizing renewable sources like wind and solar during low-output periods. Unlike lithium-ion batteries, they use liquid electrolytes stored in external tanks, allowing scalable capacity, longer lifespans, and reduced fire risks. Though currently more expensive, their lifetime cost is lower due to reusable components and minimal degradation.

China leads the global market thanks to early government support and massive energy demand, while Germany focuses on precision engineering and research. Innovations such as organic electrolytes could reduce reliance on critical raw materials like vanadium, making production more sustainable and globally scalable. With pilot projects like “Redox Wind” and growing interest in Latin America, redox flow technology is positioned to play a key role in replacing fossil fuels—if costs continue to fall and global investment increases.

This video summary was created by AI from the original DW script. It was edited by a journalist before publication.