万立骏院士领衔！中科院化学所「国家杰青」郭玉国&郭玉洁，最新Nature Nanotechnology！

TL;DR - A Nature Nanotechnology study identifies iron migration and dissolution as the main degradation mechanism in iron-rich layered sodium-ion cathodes. Multi-element nanoscale doping stabilizes iron coordination, enabling durable ampere-hour-scale cells.

• Fe migration into sodium layers and subsequent dissolution trigger microcracks, dislocations, uneven stress, and capacity loss.
• Al, Co, and Y dopants respectively strengthen Fe–O bonding, reduce magnetic frustration, and stabilize surface interfaces.
• The doped cathode suppresses cracking, layer slipping, and iron dissolution while retaining its O3 structure.
• A 2.7 Ah pouch cell achieved 121 Wh kg⁻¹ initially and retained 83.4% capacity after 2,000 cycles.