Are you aware of the progress being made in the field of electric storage technology?. Who said government investment is necessary? All the government needs to do is clear the regulatory roadblocks preventing this technology from being widely adopted for use in hybrid-electrics and EV's.
Not aware of any breakthroughs. If you have new information could you outline some of it? Last I read nano-tube and capacitor storage tech was imminent. As I recall some of the capacitor storage companies had applied for patents. Since then crickets.