Hexaazatrinaphthylene self-fused multi-N-heterocycles for high-capacity and long-life aqueous magnesium-ion batteries

Hexaazatrinaphthylene self-fused multi-N-heterocycles enable multielectron Mg 2+ redox reactions and structural insolubility in aqueous electrolytes, achieving excellent capacity (375 mAh g −1 ) and life (20 000 cycles) in magnesium-ion batteries.