V4C3 MXene-derived Zn0.99V5O12·nH2O nanoribbons as advanced cathodes for ultra-long life aqueous zinc-ion batteries

Zn 0.99 V 5 O 12 · n H 2 O nanoribbons deliver a low decay ratio of 0.000687% per cycle at 5 A g −1 over 15 000 cycles due to low charge transfer resistance, high D Zn 2+ , high capacitive contribution, and excellent reversible phase transition.