Fig. 2. Characterizations of Zn@CFs composite anode. (a) XRD patterns of Zn@CFs and pristine carbon fiber substrate. (b) XPS spectrum of the as-prepared Zn@CFs anode. (c and d) SEM images of pristine carbon fiber substrate and Zn@CFs anode, the image inside (d) is a cross-view of Zn@CFs anode. (e and f) Mapping image and EDS test of the as-prepared Zn@CFs anode, Zn element was marked in red (e).
