Surface Patterning of Metal Zinc Electrode with an In-Region Zincophilic Interface for High-Rate and Long-Cycle-Life Zinc Metal Anode

Abstract

Highlights A stable Zn anode was obtained by patterning Zn foil surfaces and endowing a zincphilic interface in microchannels. The accumulation of electrons in the microchannel and the zincphilic interface promoted preferential heteroepitaxial Zn deposition in the microchannel region and subsequent homoepitaxial Zn deposition on the array surface. The Zn symmetrical cells could undergo repeated plating/stripping for more than 25,000 cycles at the current densities of 10 and 20 mA cm−2.

Keywords

• Zn metal anode
• Surface patterning
• Directional Zn deposition
• Aqueous Zn-I2 batteries