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Rechargeable aqueous Zn metal batteries hold exciting promise for next-generation grid-scale energy storage owing to their virtues of low cost, high safety, and eco-benignity. However, the detrimental corrosion and dendrite...

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Zn metal holds grand promise as the anodes of aqueous batteries for grid-scale energy storage. However, the rampant zinc dendrite growth and severe surface side reactions significantly impede the commercial implementation. Herein, a universal Zn-metal oxide Ohmic contact interface model is demonstrated for effectively improving Zn plating/stripping reversibility. The high work function difference between Zn and metal oxides enables the building of an interfacial anti-blocking layer for dendrite-free Zn deposition. Moreover, the metal oxide layer can function as a physical barrier to suppress the pernicious side reactions. Consequently, the proof-of-concept CeO 2 -modified Zn anode delivers ultrastable durability of over 1300 h at 0.5-5 mA cm −2 and improved Coulombic efficiency, the feasibility of which is also evidenced in MoS 2 //Zn full cells. This study enriches the fundamental comprehension of Ohmic contact interfaces on the Zn deposition, which may shed light on the development of other metal battery anodes.

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Flexible membrane consisting of ultralong VO@conducting polypyrrole (VO@PPy) core-shell nanowires is prepared by a facile in situ interfacial synthesis approach. The VO is for the first time demonstrated to show versatile function of reactive template to initiate the uniform and conformal polymerization of PPy nanocoating without the need for extra oxidants. The freestanding PPy-encapsulated VO nanowire membrane is of great benefit in achieving strong electrochemical harvest by increasing electrical conductivity, shortening ion/electron transport distance, and enlarging electrode/electrolyte contact area. When evaluated as binder- and additive-free supercapacitor electrodes, the VO@PPy core-shell hybrid delivers a significantly enhanced specific capacitance of 334 F g along with superior rate capability and improved cycling stability. The present work would provide a simple yet powerful interfacial strategy for elaborate constructing VO/conducting polymers toward various energy-storage technologies.