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Iron phosphate  (Source: MIT)
The new battery isn't ready for commercial development, but it shows great promise

A new battery material created by researchers from the Massachusetts Institute of Technology (MIT) could lead to much faster recharge times for batteries.

MIT professor Gerbrand Ceder and researcher Byoungwoo Kang said the material can discharge energy and recharge nearly 100 times faster than batteries currently used in mobile phones.  Lithium-ion batteries are widely used in laptops as well, and could allow longer battery life and faster recharge time if a user is away from a power source for long durations of time.

"The ability to charge and discharge batteries in a matter of seconds rather than hours may open up new technological applications and induce lifestyle changes," Ceder and Kang sad in the latest edition of Nature.

The duo created a small battery that normally takes six minutes to charge, but used their new traffic flow to recharge the same battery in just 10 to 20 seconds.

It was widely believed the ions and electrons inside the battery moved too slowly, but the researchers noticed that wasn't the case.  They focused on how ions enter nano-scale tunnels aimed at moving electrons around the battery, and eventually created a lithium phosphate coating that helps push ions to the nano-scale tunnels.

Rechargeable lithium batteries used today have the ability to store high amounts of energy, but don't normally release that power, so they discharge very slowly.    

The battery has been supported with federal research money, and two companies have already licensed the technology, MIT announced.  It'd be possible to start mass producing the batteries in two to three years, the MIT researchers said. 



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RE: dangerous?
By TomZ on 3/13/2009 12:27:10 PM , Rating: 0
quote:
Nothing produces energy
The Sun produces energy via nuclear fusion.

http://en.wikipedia.org/wiki/Sun


RE: dangerous?
By stirfry213 on 3/13/2009 12:56:13 PM , Rating: 2
Thermodynamics...

Energy can not be created or destroyed, it can only change forms.

The Sun neither creates or destroys energy. It's nuclear fusion creates heavier atoms out of lighter ones, with the excess given off in many forms - heat/light/etc.

Don't believe everything you read in wikipedia...


RE: dangerous?
By TomZ on 3/13/09, Rating: -1
RE: dangerous?
By stirfry213 on 3/13/2009 2:54:28 PM , Rating: 2
You are sadly mistaken.

quote:
The increase in the internal energy of a system is equal to the amount of energy added by heating the system, minus the amount lost as a result of the work done by the system on its surroundings.


Since you like wikipedia:

http://en.wikipedia.org/wiki/First_law_of_thermody...
http://en.wikipedia.org/wiki/Conservation_of_energ...
http://en.wikipedia.org/wiki/Conservation_law

In nuclear fission or fusion (or any reaction what-so-ever), energy is NEVER created or destroyed. The amount of energy that binds the particles of an atom is immense. This allows fusion reaction of converting hydrogen to helium to release insane amounts of energy that is stored in an atom.

quote:
In stars, hydrogen nuclei combine with each other in nuclear reactions to build helium atoms. These high-energy reactions create the light and heat of the Sun and most other stars.


http://encarta.msn.com/encyclopedia_761552913/hydr...

Once you grasp all this information, you might try research Entropy:

http://en.wikipedia.org/wiki/Entropy


RE: dangerous?
By TomZ on 3/13/2009 4:48:55 PM , Rating: 2
Maybe it's just semantics, not sure.

But the First Law, when stated just in terms of "energy" alone as you and I have stated it thus far, only holds up as long as you exclude nuclear processes like fission and fusion. And this makes sense when you think about it because these nuclear processes were first described in the beginning of the 20th century. The First Law, however, was stated nearly a century earlier.

If you restate the First Law to say that the combination of mass and energy are always conserved, then this properly takes into account nuclear processes. This is a more modern definition.

Mass and energy are not strictly speaking the same thing, although through a nuclear process it is possible to convert one to another.

This is how I learned it in college physics, and I don't see anything in any of your links that contradicts what I'm saying.

And here's a link that covers the "except" part for you (notice footnote #2).

http://www.cudenver.edu/Academics/Colleges/College...

Based on all this, I don't think it is much of a stretch to say the Sun "creates" energy, even though technically it is just converting mass to energy through fusion. But since most people agree that mass and energy are different things...you follow what I'm saying here?


RE: dangerous?
By Black69ta on 3/14/2009 12:43:28 PM , Rating: 4
First Law does hold up even in terms on Fission and or Fusion.
Think of it this way Nuclear Bonds are immensely strong, so when you fissile an atom (or split it) you release the energy that was required to hold it together. But one atom isn't split at a time, it is a function of millions and billions of atoms at a time hence the tremendous amounts of energy released.

Fusion is the opposite, Deuterium and Tritium both contain a set amount energy to bond them into atoms. When fused they form an ordinary Helium atom. Helium requires less nuclear bonding then Deuterium and Tritium combined so the excess energy is released. There is no creation just conversion. The "First Law of Thermodynamics" is a law because there are no exceptions.

If a star like our sun produced energy instead of just converting the mass is contains, there would be no Supernovas or Black Holes or stars that just burn out. They burn out out because the mass of fuel they contains runs out and they can no longer support fusion.

Mass is not the same a energy however is is equivalent to energy related by the formula E=Mc^2, at least least until someone can prove Einstein wrong. Mass and energy can be thought of as the same in the way that water and Ice can be thought of as the same while a cubic meter of water doesn't freeze into a cubic meter of ice, the ratio is constant, much the same as the ratio of mass to energy.


RE: dangerous?
By MrPoletski on 3/16/2009 7:13:06 AM , Rating: 2
You sir, are correct.

Mass is another form of energy, but energy is not another form of mass. =)


RE: dangerous?
By masaauk on 3/16/2009 10:20:40 PM , Rating: 2
I am truly sorry good sir but you're incorrect. Nuclear fission/fusion does not change mass into energy (not intrinsic mass anyways). They change relativistic mass, which already has an energy component to it, (the energy added by binding energies within the atom) into energy. The intrinsic mass of two hydrogen atoms is the same as one helium atom (assuming a deuterium ion). If you take into account the differences in binding energy, the helium atom now has a relativistic mass lower than its components. That energy is released in the form of EM radiation.
Don't blame it on the alcohol, blame it on the strong force!


RE: dangerous?
By stirfry213 on 3/13/2009 4:04:09 PM , Rating: 2
Just incase anyone is curious, here's another link that can be informative.

http://en.wikipedia.org/wiki/Energy


RE: dangerous?
By Omega215D on 3/14/2009 7:09:35 AM , Rating: 2
Right at the bottom of the page (for me) "In this house we obey the laws of thermodynamics"


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