Heterointerface synergy between a 3 × 3 tunnel τ-MnO2 cathode and Mg2(OH)3Cl·4H2O for achieving long cycle-life aqueous zinc-ion batteries

The prepared of τ-MnO 2 –Mg 2 (OH) 3 Cl·4H 2 O heterostructure cathode material enhances Zn-ion diffusion, increases the proportion of Mn(IV) and suppresses structural instability, thereby improving the cycling stability of τ-MnO 2 .