There’s an exciting new development in the global race to discover next-gen battery tech. Iron-air batteries are finally ready to be tested in real-world applications, with major disruptive potential for the energy storage sector. These batteries use rust to create electricity and have the potential to deliver long-term energy storage at a time when such a breakthrough is desperately needed. Iron-air batteries function by running air through a negatively charged cathode toward a positively charged iron anode to react with a water-based…