Energy

Brainiacs at Rice University today debuted a spray-on lithium ion battery that they say could be applied to nearly any surface. You read that right -- a paintable battery.

The paint contains layers, each representing a necessary component of a conventional battery -- current collectors made in part from purified single-wall carbon nanotubes, a cathode, an anode, and a polymer separator -- as described in a report published today in Nature authored by Rice graduate student Neelam Singh and her team. Spraying the painted battery is a multilayer process, but when you're done, you have a covered surface that stores energy and discharges it when needed -- that is, a battery. … Read more

Apple's iPad costs precious little for you to charge it each year, according to a new study.

The Electric Power Research Institute (EPRI) conducted a study recently to see how much the iPad costs in electricity if users fully charge it every other day. The research agency, which is funded by electric power companies, found that the iPad will cost owners $1.36 a year, thanks to its consumption of just 12 kWh of electricity each year.

The EPRI assumed that there are now 67 million iPads in the world and applied the average energy use to each device … Read more

On October 4, 2004, the idea of incentive prizes hit the mainstream when Burt Rutan and his team at Scaled Composites launched SpaceShip One into orbit for the second time and won the $10 million Ansari X Prize.

Since then, prizes like that have become more and more common, and though the X Prizes are still the gold standard, there are now similar competitions from medical research to science to business, and beyond.

Not long ago, however, the U.S. government got into the business (PDF) of using competitions like these to come up with new ways to solve existing … Read more

How does a microbe know how to share electrons with an inanimate object? A wide variety of microbes can send electrons into, or accept electrons from, conducting materials. Witness the fuel cells that rely on different types of bacteria to exchange electrons with graphite electrodes.

But investigators have wondered how that ability arose. Most organisms internally generate energy by coupling the addition of electrons to one molecule with their removal from another. But some microbes find themselves in circumstances where they must cooperate to generate the energy for life, swapping molecules or electrons with other species. Do these microbes enhance … Read more

The Nest Learning Thermostat has found a new home with the folks at Apple.

The company better known for iPhones and iPads is now selling the high-tech thermostat in its online store for $249.95. But the Nest is unlike conventional thermostats.

As befits the term "learning," the Nest can learn and remember your preferred temperatures to automatically keep things cool or warm. It turns itself off when your house is empty. And it taps into the power of remote control, letting you change the temperature from anywhere via your iPhone, iPad, Android device, or Mac.

This is … Read more

The concept of an illuminated piece of wood might seem hard to visualize, but Japanese designer Ryosuke Fukusada created a surreal wooden light bulb that would make anyone do a double take.

Fukusada, who previously worked with Sharp, designed the "still under development" lamp with a "mix of modern design and traditional craft technique," as noted on his Web site. … Read more

Your Gmail box lives somewhere in the jumble of servers, cables, and hard drives known as the "cloud" but it often migrates in search of the ideal location.

Google today released an animation that answers the question: what happens when I press send on Gmail? The company created the interactive feature called The Story of Send to highlight the security and relatively low energy footprint of its data centers. The graphics repeat Google's estimate that its data centers use 50 percent less energy than a typical data center and 30 percent of their data center energy is … Read more

Scientists are genetically engineering viruses in the pursuit of better battery life, perhaps leading to smartphones charged from the motion of walking.

The Department of Energy's Lawrence Berkeley National Laboratory yesterday described a microelectronic device that uses a benign virus to build up electric charge from movement.

Its first prototype was able to display the No. 1 on an LCD display when a person pressed a postage-stamp size button.

That amount of current isn't useful enough to charge common electronics, such as a music player or phone. But the researchers' novel approach to harvesting energy from motion shows … Read more

It's a green-energy geek's dream do-it-yourself project: attach a few solar panels to your deck and watch your electric bills go down. Now one company is selling such a product.

SpinRay Energy has developed a system that lets consumers install up to five solar panels on their decks and plug them into an outdoor power outlet. People can install one panel at a time, and get up to 1,000 watts of power with five installed.

The main electrical components of the system have the UL safety certification, including the solar panel and the microinverter, which converts direct … Read more