Heteroatoms dual-doped hierarchical porous carbon-selenium composite for durable Li-Se and Na-Se batteries

Elemental selenium was impregnated into the heteroatoms (N, O)-doped hierarchical porous carbon (HDHPC). Se/HDHPC exhibits superior electrochemical performance as cathode for lithium/sodium-Se battery in low-cost carbonate electrolyte because of the synergic effect of heteroatoms (N, O) doping and unique porous structure.427