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Batteries

New research examines the economics of storing energy from renewable sources (Photo: Shutt...

True or false: solar and wind power are freely available and clean, and thus should always be stored when they generate more energy than the grid can use? It's easy to assume that renewable energy should never be turned off, but scientists at Stanford have done the math to find the break-even point where storing energy is better than "wasting," or curtailing, that energy, and their findings aren't necessarily as you'd think.  Read More

Two ambient backscatter test devices are able to communicate, despite having no batteries ...

In order for the Internet of Things to become a reality, devices will need to be able to communicate with the internet and with one another. If they have to be powered up in order to so, however, a lot of electricity is going to be wasted. That’s where a new technology known as “ambient backscatter” comes into the picture. Developed by engineers at the University of Washington, it uses ever-present existing TV and cellular signals to provide the power and medium for battery-less communications.  Read More

A phone running OpenSignal's WeatherSignal app

Smartphone batteries contain tiny temperature sensors, designed to keep the phone from overheating. While those sensors do measure the heat generated within the phone, their readings are also affected by the temperature of the phone’s external environment. With that in mind, British app developer OpenSignal has created a system that allows multiple users’ phones to provide real-time, location-specific weather reports.  Read More

Monash University researchers have created a compact electrode that uses a liquid electrol...

Graphene-based supercapacitors have already proven the equal of conventional supercapacitors – in the lab. But now researchers at Melbourne’s Monash University claim to have developed of a new scalable and cost-effective technique to engineer graphene-based supercapacitors that brings them a step closer to commercial development.  Read More

The battery is designed to even out power from renewable sources such as wind (Photo: Jon ...

Europe's largest battery is to undergo testing in the UK, where it will be used to store and regulate energy generated from renewable sources such as wind and solar power, The Guardian reports. The lithium manganese battery, developed by S&C Electric Europe, Samsung SDI and Younicos, will be capable of storing up to 10 MWh of energy.  Read More

A closeup of the wood fibers used by the researchers in their sodium-ion battery (Image: U...

Li-ion batteries may be ok for your smartphone, but when it comes to large-scale energy storage, the priorities suddenly shift from compactness and cycling performance (at which Li-ion batteries excel) to low cost and environmental feasibility (in which Li-ion batteries still have much room for improvement). A new "wood battery" could allow the emerging sodium-ion battery technology to fit the bill as a long-lasting, efficient and environmentally friendly battery for large-scale energy storage.  Read More

One of the lithium-ion 'microbatteries'

While we’re currently witnessing the rise of tiny electronic devices such as biosensors, many of those devices do have one limiting factor – they still require not-so-tiny batteries, which ends up somewhat defeating the whole miniaturization process. Although some devices can get their power from external sources, scientists from Harvard University and the University of Illinois at Urbana-Champaign have come up with an alternative ... functional 3D-printed lithium-ion batteries no larger than a grain of sand.  Read More

Researchers are building an all-solid Li-S battery that is cheap, safe, durable, and store...

Researchers at the Oak Ridge National Laboratory (ORNL) have come up with a promising design for a lithium-sulfur rechargeable battery that is considerably cheaper and energy-dense than standard lithium-ion. Using a solid electrolyte rather than a liquid one, the battery is also testing much safer and more durable than previous designs.  Read More

A new flash-charging system for electric buses delivers 15-second-long battery boosts at s...

When you think of an electric bus, you probably either picture a vehicle that has to stay constantly connected to overhead trolley cables, or that attempts to run its entire route on one charge of its onboard batteries. In Geneva, however, they’re trying something else – a system in which an electric bus takes 15 seconds to receive an energy boost at selected stops.  Read More

Battery-swapping company, Better Place, has filed a motion to be put into liquidation

Swappable batteries might seem like a good idea to overcome the range limitations of electric vehicles, but the benefits of such an approach weren’t enough to save Better Place, the company responsible for the first commercial implementation of a battery-switching service.  Read More

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