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Did Researchers Create Lifetime Batteries?
May 4, 2016 by admin
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Researchers at the University of California at Irvine (UCI) have accidentally – yes, accidentally – discovered a nanowire-based technology that could lead to batteries that can be charged hundreds of thousands of times.
Mya Le Thai, a PhD candidate at the university, explained in a paper published this week that she and her colleagues used nanowires, a material that is several thousand times thinner than a human hair, extremely conductive and has a surface area large enough to support the storage and transfer of electrons.
Nanowires are extremely fragile and don’t usually hold up well to repeated discharging and recharging, or cycling. They expand and grow brittle in a typical lithium-ion battery, but Le Thai’s team fixed this by coating a gold nanowire in a manganese dioxide shell and then placing it in a Plexiglas-like gel to improve its reliability. All by accident.
The breakthrough could lead to laptop, smartphone and tablet batteries that last forever.
Reginald Penner, chairman of UCI’s chemistry department, said: “Mya was playing around and she coated this whole thing with a very thin gel layer and started to cycle it.
“She discovered that just by using this gel she could cycle it hundreds of thousands of times without losing any capacity. That was crazy, because these things typically die in dramatic fashion after 5,000 or 6,000 or 7,000 cycles at most.”
The battery-like structure was tested more than 200,000 times over a three-month span, and the researchers reported no loss of capacity or power.
“The coated electrode holds its shape much better, making it a more reliable option,” Thai said. “This research proves that a nanowire-based battery electrode can have a long lifetime and that we can make these kinds of batteries a reality.”
The breakthrough also paves the way for commercial batteries that could last a lifetime in appliances, cars and spacecraft.
British fuel-cell maker Intelligent Energy Holdings announced earlier this year that it is working on a smartphone battery that will need to be charged only once a week.
Did Researchers Create Batteries That A Lifetime? : :: TheGuruReview.net ::
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Intel Shows Wireless
Intel demoed its “no wires future” of wireless gigabit docking at its Intel Developer Forum (IDF) in California.
Intel wireless gigabit docking is a fully cable-free experience that includes wireless docking, wireless display and wireless charging. Intel demonstrated a reference design based on a next generation 14nm Intel processor on stage during its opening keynote on Tuesday.
Intel hopes to implement this technology by the end of 2015.
“Not only your wireless display, but storage, keyboard and mouse – all the other peripherals you have that have been weighing down our backpacks or strewn across our desk, we’re eliminating with one technology, and that’s wireless gigabit,” said an Intel expert on stage.
“It’s not only a secure and also localised connection – so you can use it in high dense areas such as in an office – but also extremely fast performing at over three times the performance of today’s WiFi.
“But while that’s cool we still have one more cord in our bag and let’s get rid of it: ditch that brick. That last thing that’s weighing us down is [resolved by] wireless power; the ease of use and installation it has is really going to be an advantage using the wireless resonance technology.”
The technology works over a simple receiver that goes into client devices, along with a resonance board that acts as a dock, which creates its own wireless hotspot.
Intel demonstrated how the standard will work using a laptop that automatically powered up and charged as soon as it reached the surface of the table due to the magnetic charging field built into the desk surface.
Intel said that this technology could also charge wireless Bluetooth earpieces, wearable devices, tablets and notebooks. However, it doesn’t have to be built into devices to work, as Intel said it can also be retrofitted into the cases of the devices we are carrying around.
Intel’s wireless gigabit technology is another push towards the firm’s vision of a cable-free future, meaning there’ll be no annoying wires or leads connecting computers to monitors, laptops to plug sockets or tablets to projectors.
The semiconductor giant first announced this view in August, saying that it’s looking to change the enterprise IT market with a strategy that will offer “three major experiences” in the office, that is, wireless display connectivity, wireless docking and wireless charging.
Tesla Updates Charging Software
January 22, 2014 by admin
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Tesla Motors Inc is making changes to prevent overheating of its charging systems, including giving customers upgraded wall adapters and providing charging-software upgrades, the electric-car company said on Friday.
The moves come after a November garage fire involving a Model S in Irvine, California, which the Orange County Fire Authority said may have been caused by a Tesla charging system or by a connection at the electricity panel on the wall of the garage.
At the time, Tesla disagreed with the fire officials’ findings, denying that the charging electronics were related to the fire. A Tesla spokeswoman did not immediately respond to a question on Friday about whether the upgrades were related to the Irvine fire.
In a Friday press release, Tesla said that its goal was to prevent excessive heating of the adapters used to charge its cars. A variety of factors ranging from corrosion to inappropriate wiring of electrical outlets can cause overheating, the company said.
A December tweak to its charging software tackles the issue through reducing charging by 25 percent if the charging system detects fluctuations in power entering the vehicle, Tesla said.
“Tesla believes that this software update fully addresses any potential risks,” the release said. But as a precaution, it said it would make available an improved wall adapter with a thermal fuse for affected customers, staring in a few weeks.
Separately, three road fires in Model S sedans caused Tesla’s stock to fall sharply in October.
The fires occurred in Washington state, Tennessee and Mexico. In the U.S. incidents, Model S sedans caught fire after running over road debris. In Mexico, a Model S caught fire after striking a concrete wall.
On Friday, Tesla’s stock fell 1.23 percent to $145.72, up from levels under $120 in late November but down from its high of $194.50 in late September.
Toyota Goes Wireless Charging
January 2, 2013 by admin
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Toyota is taking the smartphone boom quite seriously and the car-maker hopes to offer the first wireless charging systems in select models as early as next year.
Toyota’s wireless system will be compatible with the Qi standard and it will be introduced in the new Avalon sedan next year. Of course, it will be optional and it will be part of Toyota’s $1,950 “technology package” which includes other geeky goodies as well.
According to the BBC, Chrysler is also planning to offer a similar system in the Dodge Dart. Other car-makers will no doubt offer wireless charging functionality sooner rather than later.
The number of Qi compatible phones is limited for the time being. Just 34 phones support it, including the Lumia 920, Nexus 4 and HTC Windows Phone 8X. However, some very popular devices like Apple’s iPhone and Sammy’s Galaxy S series phones don’t support wireless charging just yet.