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！
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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.
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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！
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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.