Figure 1From: Copper nanofiber-networked cobalt oxide composites for high performance Li-ion batteries FESEM images. (a) Horizontally layered CuNFs (the inset shows a highly magnified image of the prepared nanofiber); (b) CoO x TF prepared by RF-sputtering (the inset shows the deposited thin-film thickness); (c) the composite structure of CuNFs@CoO x (the inset shows the cross-sectional view of the nanofiber and thin-film, respectively).Back to article page