Experts say too much funding is going into hydrogen at the expense of near-term technologies.
Solid-state lighting is mounting a challenge to light bulbs.
Novel, shape-changing batteries could lead to energy-saving aircraft wings and helicopter rotors.
If Plug Power, a maker of hydrogen fuel cells, succeeds, it will be in an unexpected market.
Automakers look to thermoelectrics to help power tomorrow's vehicles.
New production methods could transform the niche technology.
Why hydrogen might not power future vehicles and lithium-based batteries might.
A new, fast-charging battery will make drills and hybrid cars more powerful.
Technology Review speaks with France's head of nuclear energy.
Self-contained power plants could supply growing energy demand in poor countries.