Figure 2: Structure and morphology of nanocomposite electrodes.
From: Freestanding three-dimensional core–shell nanoarrays for lithium-ion battery anodes

s.e.m. and TEM micrographs of the CNE (a,e), CCNE (b,f) and CNNE (c,g) based on the copper foils. (d,h) Schematic of the oxidation, deposition and reduction processes of the nanosubstrates. Scale bars in a–c, 20 μm; scale bars in e–g, 200 nm.