China develops all-iron battery with 99.4% efficiency over 6000 cycles
Original: China's new iron battery hits 99.4 percent efficiency over 6000 cycles
Why This Matters
Could revolutionize grid-scale energy storage with cheap, abundant materials
Chinese Academy of Sciences researchers created an all-iron flow battery achieving 99.4% efficiency across 6000 charge cycles, equivalent to 16+ years of daily use. Iron costs 80 times less than lithium, offering affordable grid-scale storage.
Researchers at the Institute of Metal Research of the Chinese Academy of Sciences developed an advanced all-iron flow battery using a specialized electrolyte formulation. The breakthrough addresses long-standing issues of material degradation and membrane crossover through molecular-level engineering of iron complexes. The battery prototype maintained stable structure and perfect reversibility over 6000 cycles with zero capacity loss, equivalent to over 16 years of daily operation. With iron trading at 80 times less cost than lithium, this technology offers a budget-friendly alternative for grid-scale renewable energy storage. The team employed 'synergistic design' creating a double-layered molecular defense system that physically shields iron cores and uses negative charge to repel leaking particles.