Figure 7
X-ray diffraction patterns evolution upon delithiation of LiCoO2 in electrolyte ethylene carbonate:dimethyl carbonate (1:1) with 1 M LiPF6. The indicated potential is versus Li/Li+; the dotted line represents the position of the (003) rhombohedral peak. Peaks indicated are the (003) reflection of rhombohedral Li1–xCoO2 (*); the (002) reflection of carbon (+); the (001) reflection of monoclinic Li1–xCoO2 (§); and reflections from polyethylene and polypropylene from the cell case (#). |