The formation energy, phase diagram, voltage, crystal structural parameter and density of state can be calculated using VASP software package.

The rapid development of modern electronic products require power sources with higher energy density, but the state-of-the-art battery technologies cannot meet the requirement.

Secondly, we investigate the energy density produced by a state vector which is the superposition of three single electron states in the Dirac field in the four-dimensional Minkowski spacetime.