Novel Fe single-atom catalysts with highly coordinated Fe–N₄SP structures were designed via the multi-coordination-shell synergistic effect. The optimization of the catalysts enhances their ORR activity in alkaline/acidic media towards rechargeable Zn–air batteries.

Extraordinarily high reversible capacity of lithium-ion battery anodes is realized from SnO₂/α-MoO₃ core-shell nanobelts. The reversible capacity is much higher than traditional theoretical results. Such behavior is attributed to α-MoO₃ that makes extra Li₂O reversibly convert to Li⁺.

Herein we report that organic compounds comprising planar C ₆ ring structures and carboxylate groups can function as an excellent anode material for sodium-organic batteries.