Figure 2From: Copper nanofiber-networked cobalt oxide composites for high performance Li-ion batteries Microstructural properties. (a) x-ray diffraction patterns of the CuNFs, CoO x TF, and CuNFs@CoO x on a stainless steel disc. For the case of CuNFs, we loaded a large amount of CuNFs to acquire a significant signal. The asterisk mark can be indexed to the stainless steel substrate; (b) x-ray photoelectron spectrum for Co 2p3/2 and 2p1/2 of the sputtered CoO x .Back to article page