Fig. 2

(a) XRD analysis of graphite anode; SEM surface morphologies of (b) electrode-a, (c) electrode-b, (d) electrode-c, (e) electrode-d, (f) 1electrode-e, (g) electrode-f, (h) electrode-g, (i) electrode-h, (j) electrode-i, (k,l) SEM image of graphite electrode at high magnification along with its EDS analysis. Note: Scale for (b) 20 μm, (c–j) 200 μm, and (k,l) 2 μm.