Researchers in Switzerland have used X-ray tomography to screen lithium-ion battery electrodes and have reconstructed these microstructures in high resolution. The flow behavior of the lithium ions, they have found, can be described by what is known as tortuosity. To put it simply, the more twisted the path of the ions through the electrode, the more slowly the battery is charged or discharged.
The shrinking size and increasing capacity of batteries in the past few decades has made possible devices that have transformed everyday life. But small isn't the only frontier for battery technology. As the world enters its most energy-intensive era, the search is on for bigger, cheaper, and safer batteries that can capture, store, and efficiently use sustainable energy on a large scale. To determine how best to meet those large-scale energy needs, researchers are probing small-scale, off-the-shelf D-cell batteries.
Electric cars are still an iffy proposition for most consumers because of the limited range offered by lithium-ion battery. A promising avenue of research is the lithium-sulfur battery, which is significantly more powerful and less expensive than the better-known lithium-ion battery. Although their short lifespan has made them unsuitable before now, this may be about to change if development work in Germany is successful.
Certain bacteria can breathe iron like we breathe oxygen. Understanding how they do so will help researchers use the microbes for cleaning up soil contaminants, for trapping carbon dioxide, or for making batteries out of bacteria. Now, a team of researchers report that proteins on the surface of bacteria produce an electric current by simply touching a mineral surface, allowing them to breathe the iron in the rock.
A Boeing 787 with a redesigned battery system made a 2-hour test flight on Monday, and the company said the event "went according to plan." The test flight was an important step in Boeing Co.'s plan to convince safety regulators to let airlines resume using the plane, which the company calls the Dreamliner.
According to recent research at Rice University, vanadium oxide and graphene may be a key new set of materials for improving lithium-ion storage. Ribbons created at Rice from these two materials are thousands of times thinner than a sheet of paper, yet have potential that far outweighs current materials for their ability to charge and discharge very quickly. Initial capacity remains at 90% or more after more than 1,000 cycles.
Boeing's comments about the smoldering batteries on its 787 have annoyed the National Transportation Safety Board. Boeing gave its own account of two battery incidents, which included a fire, at a detailed press briefing in Tokyo last week. The problem is that the NTSB is still investigating the incidents. Boeing is a party to the investigation, meaning it provides technical experts and, in effect, gets a seat at the table as investigators try to sort out what happened.
Boeing CEO Ray Conner has met with Japan's transport minister and other officials in Tokyo to explain his company's proposal for resolving problems with the 787 Dreamliner's lithium-ion batteries that have kept the aircraft grounded for over a month.
Northwestern University’s Yonggang Huang and the University of Illinois’ John A. Rogers are the first to demonstrate a stretchable lithium-ion battery—a flexible device capable of powering their innovative stretchable electronics. Their battery continues to work—powering a commercial light-emitting diode (LED)—even when stretched, folded, twisted and mounted on a human elbow. The battery can work for eight to nine hours before it needs recharging, which can be done wirelessly.
The U.S. Department of Energy's Argonne National Laboratory and California Lithium Battery Inc. (CalBattery), a Los Angeles Cleantech Incubator portfolio company, announced that they have signed a licensing agreement for an Argonne-developed, silicon-graphene composite anode material for high-energy lithium batteries.
Japanese investigators have identified the causes of fuel leaks and other problems with Boeing's 787 but are still investigating the more serious battery problem that forced an emergency landing in January and the worldwide grounding of the jets. The Transport Ministry on Friday released the results of its investigation into problems that occurred with 787 Dreamliner jets in January.
While the demand for ever-smaller electronic devices has spurred the miniaturization of a variety of technologies, one area has lagged behind in this downsizing revolution: energy storage units, such as batteries and capacitors. Now, a team from University of California, Los Angeles may have changed the game by developing a groundbreaking technique that uses a DVD burner to fabricate microscale graphene-based supercapacitors.
A probe into the overheating of a lithium ion battery in an All Nippon Airways Boeing 787 found it was improperly wired, Japan's Transport Ministry said Wednesday. The Transport Safety Board said in a report that the battery of the aircraft's auxiliary power unit was incorrectly connected to the main battery that overheated, although a protective valve would have prevented power from the APU from doing damage.
Researchers at the University of Southern California have developed a new lithium-ion battery design that uses porous silicon nanoparticles in place of the traditional graphite anodes to provide superior performance. The new batteries hold three times as much energy as comparable graphite-based designs and recharge within 10 minutes.
A U.N. agency that sets global aviation safety standards is moving to prevent aircraft batteries like the one that caught fire on a Boeing 787 last month from being shipped as cargo on passenger planes, people familiar with the effort said.
A Lawrence Livermore National Laboratory team is working to improve lithium-ion battery performance, lifetime, and safety. Working with Lawrence Berkeley National Laboratory, the scientists are developing a new methodology for performing first-principles quantum molecular dynamics simulations at an unprecedented scale to understand key aspects of the chemistry and dynamics in lithium-ion batteries, particularly at interfaces.
The U.S. government should reassess its safety approval of the Boeing 787's lithium ion batteries, America's top accident investigator said Thursday, casting doubt on whether the airliner's troubles can be remedied quickly.
Netzsch Instrument North America LLC and the National Renewable Energy Laboratory have announced a joint collaboration to develop an instrument designed to test the performance and safety of large-format lithium-ion batteries (LFLIB). The instrumentation will be able to safely and accurately characterize heat output and efficiency of LFLIB, in varying temperature, pressure, load, and use conditions.
The use of lithium ion batteries to power aircraft systems isn't necessarily unsafe despite a battery fire in one Boeing 787 Dreamliner and smoke in another, but manufacturers need to build in reliable safeguards, the nation's top aviation safety investigator said Wednesday.
Japan's Transport Safety Board says the lithium ion battery aboard a Boeing 787 flight in Japan last month found evidence of the same type of "thermal runaway" seen in a similar incident in Boston. The board said in a report Tuesday that CAT scans and other analysis found damage to all eight cells in the battery that overheated on an All Nippon Airways 787 on Jan. 16, prompting an emergency landing.
Researchers at Columbia University are attempting to build self-powered systems using nanoscale devices that can transmit and receive wireless signals using so little power that their batteries never need replacing. Some of the chips built so far are 100 times more energy efficient than most standard technologies, and they rely on tiny bits of ambient solar energy to recharge themselves.
At the time the government certified Boeing's 787 Dreamliners as safe, federal rules barred the type of batteries used to power the airliner's electrical systems from being carried as cargo on passenger planes because of the fire risk. Now the situation is reversed.
Japan's Civil Aviation Bureau is sending investigators looking into problems with Boeing 787 batteries to Seattle, where the aircraft are assembled. The Transport Ministry said members of the team working on the investigation would leave Tokyo on Sunday for Seattle. It provided no further details.
An enhanced battery technology that can potentially reduce the time it takes to charge cell phones, electric vehicles, and other battery-powered devices from hours to minutes is the subject of a commercial license agreement between Battelle and Vorbeck Materials Corp. The agreement will allow Vorbeck to bring lithium batteries incorporating Vor-X graphene technology to market for use in consumer portable electronic and medical devices, tools, and electric vehicles.
Northwestern University graduate student Jonathan Barnes had a hunch for creating an exotic new chemical compound, and his idea that the force of love is stronger than hate proved correct. He and his colleagues are the first to permanently interlock two identical tetracationic rings that normally are repelled by each other. Many experts had said it couldn't be done.