Achieving the synergy of intercalation and defect engineering in a Cu 2− x Te anode for high-performance aqueous “rocking-chair” zinc-ion batteries

A defect-engineered Cu 2− x Te-CTAB anode with enhanced structural stability suppresses dendrite formation and side reactions, delivering 188.5 mAh g −1 after 100 cycles. The full battery provides 187.5 Wh kg −1 and 20 000-cycle lifespan.