We
demonstrate the growth of dendritic magnesium deposits with
fractal morphologies exhibiting shear moduli in excess of values for
polymeric separators upon the galvanostatic electrodeposition of metallic
Mg from Grignard reagents in symmetric Mg–Mg cells. Dendritic
growth is understood on the basis of the competing influences of reaction
rate, electrolyte transport rate, and self-diffusion barrier.
Galvanostatic electrodeposition from Grignard reagents in symmetric Mg–Mg cells is used to map Mg morphologies from fractal aggregates of 2D nanoplatelets to highly anisotropic dendrites with singular growth fronts and entangled nanowire mats.
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