V and both peaks at 14.3° and 8.9°, which signals the presence of the layered structure, diminished, while a broad peak appeared at 13.4°. This indicates the layered structure was destroyed and amorphous products formed at the deep discharge condition. At the end of the following charge (stage V), no crystalline product(s) can be detected in the XRD pattern, suggesting there was minimal to no restoration of the pristine multi-layered structure of MoS2.