The world needs a new source of energy, an unspillable source.

Afterburner for ion propulsion?

The ion particle are accelerated out the back of the space ship using a electrostatic grid. The ion particles are accelerated to a top speed of 100 000 km/h. If you are placing more electrostatic grids along the back of the engine, will the ion particles go faster then 100 000 km/h ?