Lawrence Berkeley National Laboratory: Nanostructured Polymer Electrolyte for Rechargeable Lithium Batteries a polymer electrolyte that enables the development of rechargeable lithium metal batteries with an energy density that is high enough "to enable electric battery-driven transportation technology" [REF].
Next-Alternative is developing a carbon nanotube lead acid battery pack that will, according to the company, deliver 380mi range and can be recharged in less than 10 minutes.