Abstract
AbstractThe improvement of rechargeable zinc/air batteries was a hot topic in recent years. Predominantly, the influence of water and additives on the structure of the Zn deposit and the possible dendrite formation were studied. However, the effect of the surface structure of the underlying substrate was not focused on in detail, yet. We now show the differences in electrochemical deposition of Zn onto Au(111) and Au(100) from the ionic liquid N‐methyl‐N‐propylpiperidinium bis(trifluoromethanesulfonyl)imide. The fundamental processes were initially characterized via cyclic voltammetry and in situ scanning tunnelling microscopy. Bulk deposits were then examined using Auger electron spectroscopy and scanning electron microscopy. Different structures of Zn deposits are observed during the initial stages of electrocrystallisation on both electrodes, which reveals the strong influence of the crystallographic orientation on the metal deposition of zinc on gold.
Highlights
In recent years, the market demand for improved mobile energy devices increased tremendously
Angewandte Chemie International Edition published by Wiley-VCH GmbH Angew
The Zn bulk deposition on Au(111) appears as a homogeneous island-covered surface, whereas the formation of big Zn clusters can be observed on Au(100). This reveals the strong influence of the crystallographic orientation for Zn electrodeposition on different Au single crystal electrode surfaces
Summary
The market demand for improved mobile energy devices increased tremendously. Further analysis of the system reveals that the electrodeposition of zinc results in a positive shift of the negative decomposition potential of [MPPip][TFSI].
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