Synergy of Dendrites-Impeded Atomic Clusters Dissociation and Side-Reactions Suppressed Inert Interface Protection for Ultrastable Zn Anode.

The sluggish ions-transfer and inhomogeneous ions-nucleation induce the formation of randomly-oriented dendrites on Zn anode, while the chemical instability at anode-electrolyte interface triggers detrimental side reactions. Herein, we in-situ design a multifunctional hybrid interphase of Bi/Bi 2 O 3 , for the first time resulting in a novel synergistic regulation mechanism involving: (i) chemically-inert interface protection mechanism suppresses side-reactions; and more fantastically, (ii) innovative thermodynamically-favorable Zn atomic clusters dissociation mechanism impedes dendrites formation. Assisted by collaborative modulation behavior, the Zn@Bi/Bi 2 O 3 symmetry-cell delivers an ultrahigh cumulative plating capacity of 1.88 Ah cm -2 at 5 mA cm -2 and ultralong lifetimes of 300 h even at high current density and depth of discharge (10 mA cm -2 , DOD Zn : 60%). Furthermore, under a low E/C (electrolyte-to-capacity ratio: 45 μL mAh -1 ) and N/P (negative-to-positive capacity ratio: 6.3), Zn@Bi/Bi 2 O 3 ||MnO 2 full cell exhibits a superior capacity retention of 86.7% after 500 cycles at 1 A g -1 , which outperforms most existing interphases. The scaled-up Zn@Bi/Bi 2 O 3 ||MnO 2 battery module (6 V, 1 Ah), combined with the photovoltaic panel, presents excellent renewable-energy-storage ability and long output lifetime (12 h). This work provides a fantastic synergistic mechanism to achieve the ultrastable Zn anode and can be greatly promised to apply it into other metal-based batteries. This article is protected by copyright. All rights reserved.