New Nanotube Batteries Recharge in Seconds
August 9, 2006 9:54 AM
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The new batteries can also be recharged hundreds of thousands of times say MIT researchers
You could be charging your long lasting batteries in a matter of seconds in the future if several researchers at MIT get their way.
According to a report
, researchers at MIT have discovered a new way of making batteries that involves using millions of nanotubes. Leaping over traditional battery technologies, the new types of batteries are based on capacitors, which have been around even longer than the battery itself.
A capacitor maintains a charge by relying on two metallic electrodes. The actual storage capacity of a capacitor is directly proportional to the surface area of those electrodes, and unfortunately making a capacitor in traditional battery sizes means that the electrode surface area is simply too small. To overcome this, the researchers cover the electrodes with millions of nanotube filaments, effectively increasing the surface area.
According to research team leader Joel Schindall "[the nanotube battery] could be recharged many, many times perhaps hundreds of thousands of times, and ... it could be recharged very quickly, just in a matter of seconds rather than a matter of hours." With such promise, Schindall and his team believes that the new technology will revolutionize portable electronics as well as the automotive industry. "Larger devices such as automobiles where you could regeneratively re-use the energy of motion and therefore improve the energy efficiency and fuel economy."
The research team at MIT is hoping that this new promising technology will show up in the market in less than five years from now.
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RE: a little more than that
8/9/2006 12:29:34 PM
Well first of all you would have cells of several banks of capacitors in parallel, so it’s highly unlikely that the whole battery would release its charge at once. At most you would have numerous smaller discharges instead of one great one.
And only simple fast acting fuses are required to prevent intentional electrical shorting of the main terminals of the entire bank.
What is promising about this technology is the peak instantaneous current draw allowed.
Chemical batteries have limits on the maximum current they can provide based on the rate of reaction. i.e.: short a battery with an ammeter, not only is the max current limited by the reaction speed, but the battery will be destroyed at that current due to heat released by uninhibited reaction, so not only is the maximum current limited, it’s not even attainable in practice.
A capacitor based system, provided the rest of the system could handle it, you could dump tremendous reserves instantly. Good for acceleration response in electric cars?
RE: a little more than that
8/9/2006 2:32:24 PM
You forgot one that is big to me too....the wimpy sound...
I don't know after having 2 300hp or better sports cars in my life back to back....that actually had a nice "rumble" sound....to go to a car that sounds like a blender on steroids...just not the same feeling you know?
Oh yeah and dude...800 hp!! DAYYYYYYUMMMMMM!
"Young lady, in this house we obey the laws of thermodynamics!" -- Homer Simpson
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