Envia Systems has come up with a new battery technology that could an electric car a range of 300 miles to a charge. Backed by General Motors, Envia Systems has come up with a new process creating a battery with an energy density of 400 watt hours per kilogram.

The lithium cells found in most electric cars today only pac 100-150Wh/kg and even Tesla's batteries in their upcoming Model S pack around 240Wh/kg.

In terms of cost, when it was first produced, the Nissan Leaf's battery cost around $375 per kilowatt-hour. The Envia battery is projected to cost just $125 per kilowatt-hour.

The battery works by combining a "High Capacity Manganese Rich (HCMR)" cathode and a slicon carbon nanocomposite anode, and passing the lithium ions through a new, secret electrolyte formula that allows for increased voltage.

The battery however, has yet to be independently tested by the Electrochemical Power Systems Department at the Naval Surface Warfare Center. Though, the battery won't be commercially available until perhaps 2015.

[AutoblogGreen]