Fig. 2: Effect of substrate type on nucleation overpotential during galvanostatic Zn deposition.
From: Zincophilic CuO as electron sponge to facilitate dendrite-free zinc-based flow battery
a Voltage profiles of galvanostatic Zn deposition on various substrates at a current density of 20 mA cm−2. b Adsorption energy of single Zn atom on various substrates. The inset image is a charge density difference map comparing CuO (001) and adsorbed Zn atom to their preadsorption states. The depletion and accumulation of electron charge are indicated by cyan and yellow, respectively (isosurface level: 0.005 e Å−3). c Variation of nucleation overpotential as a function of current density on b-graphite and CuO-graphite substrates.
