Stanford Researchers Invent Everlasting Battery Material

judgecorp writes "Researchers at Stanford University have invented a battery material that could allow batteries to go through 400,000 charging cycles instead of the 400 or so which today's Li-ion batteries can manage. Among the uses could be storing energy to even out the availability of renewable sources such as sun and wind." Adds a story at ExtremeTech, "The only problem is, a high-voltage cathode (-) requires a very low-voltage anode (+) — and the Stanford researchers haven’t found the right one yet; and so they haven’t actually made a battery with this new discovery."

Comments

Summary is out by an order of magnitude

[Fluffeh]

From TFA:

Stanford, however, has developed a new battery electrode that can survive 40,000 charge/discharge cycles — enough for 30 years of use on the grid.

Re:Summary is out by an order of magnitude

[garyebickford]

Well, in all fairness, that's a binary order of magnitude. :)

  - I know, that's weak. But this is slashdot.

Other orders of magnitude may be calculated using bases other than 10. The ancient Greeks ranked the nighttime brightness of celestial bodies by 6 levels in which each level was the fifth root of one hundred (about 2.512) as bright as the nearest weaker level of brightness, so that the brightest level is 5 orders of magnitude brighter than the weakest, which can also be stated as a factor of 100 times brighter.

- Order of Magnitude

And see, now you know how star magnitude is computed! :D

just starting....

[harvey the nerd]

and the Stanford researchers haven’t found the right one yet; and so they haven’t actually made a battery with this new discovery
They have hypothesized an ideal, microscopic unit device that might be mass produced. They are just starting the applied research phase and may need some additional basic research

Nothing special

[BlueParrot]

This is nothing new. Many battery technologies can last for decades. It's only the Cobalt based lithium ones that have the abysmal 2-3 year shelf-life.

Ni-Iron batteries have demonstrated more than 50 year life, with no noticeable degradation following deep discharge.
LiFePO has demonstrated less than 20% capacity loss over 15 years and many thousands of cycles.
Ni-Hydrogen has been in service without maintenance on satellites for many many years. The batteries on the Hubble went 19 years without servicing.
Lead-Acid requires a bit of servicing and maintenance, but they can also last more than a decade when properly cared for.

Now when it comes to energy storage to deal with renewables the problem is the shear amount of energy storage needed as well as energy lost to inefficiency. The technology exists, but the cost would be prohibitive.

Re:Nothing special

[Jartan]

Now when it comes to energy storage to deal with renewables the problem is the shear amount of energy storage needed as well as energy lost to inefficiency. The technology exists, but the cost would be prohibitive.

RTFA and all that. The interesting thing about this is the electrolyte is supposedly cheap as hell. Thus the idea is making some long lasting batteries the size of a house on the cheap.

Re:Nothing special

[FireFury03]

Then once you get the water up to a lake: if it's an open body of water, you're going to have evaporation. That reduces the net efficiency all the same.

A tiny amount of evaporation.. so tiny it isn't really worth caring about. Also, if you're going to start calculating such minor things, rain will improve your efficiency a tiny amount.

Even if you went to heroic efforts in turbine mechanics and used hydrogen cooled motors and generators to reduce loss to air friction, I'd bet net efficiency over 70% would be very, very difficult to achieve, even in the best and most optimistic scenario involving an open body of water.

Dinorwig Power Station averages 74-75% efficiency with open bodies of water. (No where near the 90% that the grand parent suggested, but still better than what you claim would be optimistic).

Not to say that's a bad thing, but whether or not that would be useful is entirely dependent on the needs of the grid and the type of power supply on that grid. If you've got a nuclear station that needs to run at 90%+ 100% of the time (or whatever the case may be), hydro storage might make a lot of sense; use the surplus to store energy during the low demand times.

It makes sense just to cope with demand peaks. The aforementioned Dinorwig power station can hit peak capacity in 6 seconds if they have presynchronised the generators (75 seconds if not). There aren't many "traditional" power stations that can do that (I suspect even gas turbines would struggle to hit the 6 second mark).

Re:Impossible! Really ? can you name 1 ?

[Crashmarik]

http://en.wikipedia.org/wiki/Electricity_generation#List_of_countries_with_Source_of_Electricity_2008

Because this chart in the wiki doesn't have any that aren't getting power from coal, gas, or nuclear.

Re:Wind and sun are renewable?

[LordLimecat]

Wind is generated only in part by the earth's rotation. Some of it also comes from solar energy, which heats parts of the atmosphere, causing it to rise, which then causes a low pressure zone which causes inrushing air currents.