Energy

A new prototype device works like a kind of reverse solar panel, harvesting energy from the cold night sky to passively power an LED.

It’s not unusual to find rust around salt water, but now the pairing might be more useful. Researchers have found that electricity can be produced when salt water flows over the top of thin films of rust. The process was previously seen in – what else – graphene, but rust is far easier to scale up.

Coastal wastewater treatment plants may be a nasty but necessary way to handle the effluent from our cities, but a new study by Stanford University indicates that by mixing fresh water from the plants with seawater, they have the potential to recover 18 gigawatts of electricity worldwide.

CERN’s Large Hadron Collider (LHC) has made some groundbreaking discoveries for physics, but it’s hard to tell how exactly that benefits the average Joe/Jill. Now CERN has announced that the LHC will soon divert some of the waste heat from the collider to help heat thousands of nearby homes.

One of the largest natural sources of renewable energy could be right under our feet – literally – with geothermal energy. Now researchers at Tokyo Institute of Technology and Sanoh Industrial have developed a new type of battery cell that can directly convert heat energy into electricity.

Heat loss is wasted energy. If we're to successfully create smaller, more efficient technology, then the thermal energy that our gadgets waste needs to be put to better use. This new device, which works at the nanoscale where the theoretical "blackbody limit" falls apart, could be the answer.

Abu Dhabi are claiming the title of the World's largest single-site solar project, having hit the go-button on the Noor Abu Dhabi project this week, with a reported capacity of 1.177 gigawatts, eclipsing Dubai's Mohammed bin Rashid Al Maktoum Solar Park – for now at least.

Nuclear fusion could be an essentially unlimited energy source, but large eruptions in the plasma can damage reactors. But now physicists have found a way to prevent those large eruptions, by triggering lots of small ones through the injection of tiny pellets of beryllium.

Researchers at EPFL have crunched the numbers on heat transfer in the air of train tunnels, and outlined a geothermal heat recovery system that could potentially supply heating and cooling to thousands of nearby homes.

Snowy places aren’t ideal for harvesting solar energy – panels can’t do much if they’re buried under blankets of snow, of course. Now a team from the University of California Los Angeles (UCLA) has developed a new device that can produce electricity from snow itself.

​We've already heard how batteries that are built into the structure of items – such as cars or satellites – could help extend run times without increasing bulk. Now, the flight time of a drone has been almost doubled, thanks to such "structural batteries."

After a decade of research, scientists at KU Leuven in Belgium have developed a device that can uses sunlight to produce a record-breaking 250 liters (66 gal) of hydrogen a day.