Abstract
Aqueous zinc-ion batteries are considered to be a promising technology for large scale energy storage deployment due to their advantages of low cost and high security. However, the zinc anodes suffer long-standing problems of uncontrollable dendrite growth and unstable interfacial chemistry that hinder their industrial applications. In this work, we manage to manipulate the facet zincophilicity of commercial titanium oxide (TiO2) by nitrogen implanting as a protective coating to realize long-term zinc plating/stripping. The nitrogen-implanting significantly increases the habitual facet zincophilicity of TiO2 layer to enable uniform and fast zinc deposition kinetics. Impressively, the as-protected Zn anode could be operated for a long lifespan of 2400 hours accompanying with a high cumulative capacity of 4.1 Ah cm-2 and a stable Coulombic efficiency of 99.53% over 900 cycles. This work will shed new insight on the importance of manipulating the facet zincophicility of protective coatings for dendrite-free metal anodes beyond zinc chemistry.
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